Brassicaceae oilseed crops can provide rotation benefits to dryland wheat (Triticum aestivum L.) and supply feedstock for biofuel production. However, growers face decisions about what oilseed crop is best suited for an environment. The objective of this study was to determine how varying production environments affect the agronomic performance of modern cultivars of six Brassicaceae crop species and identify ideal genotypes for seven growing environments spanning four ecoregions. A field experiment was replicated in Colorado, Idaho, Iowa, Minnesota, Montana, North Dakota, and Oregon, USA, between 2013 and 2016 to measure seed and oil yields of seed for four cultivars of Brassica napus, two of B. carinata, two of B. juncea, two of Sinapis alba, one of B. rapa, and one of Camelina sativa. Also, δ13C signature of seed was used as an indicator of water limitation. Generally, across all genotypes, seed and oil yields increased with increased growing season precipitation. Modern commercial cultivars of B. napus and B. juncea had the highest seed oil contents and generally produced the greatest oil yields across most environments, although they were not always the highest seed yielders. For instance, B. carinata over six site years in North Dakota and Minnesota yielded greater than B. napus producing as much as 2471 kg ha−1 in Minnesota. Camelina produced competitive seed yields in some of the drier environments and its δ13C signature indicated that it had the greatest drought resistance. However, seed oil content of some of these high yielding genotypes may need improvement before they are viable as biofuel feedstock.

Canola is a new crop for many inland Pacific Northwest U.S. wheat growers to consider for integration into their wheat-dominated systems. Both crops have winter and spring varieties that can fill niches in different precipitation zones across the region, and they both efficiently extract available water to depths of 4 to 6 ft if soil depth allows. Yet, physiological and morphological differences dictate necessary changes in 4R N management approaches and recommendations when transitioning from wheat to canola. Additional differences in water and N use efficiency are also key factors that contribute to region-specific N recommendations. And so, the saying goes in the inland Pacific Northwest that canola “is not your father's wheat.” Earn 1 CEU in Nutrient Management by reading this article and taking the quiz at www.agronomy.org/education/classroom/classes/410

Despite benefits to crop rotations and recent increases in value, the United States produces only a third of the canola ( Brassica napus L.) it consumes. To encourage production expansion, an experiment in Moscow, ID, evaluated dual‐purpose winter canola in a biennial system for forage and seed production. Two winter canola cultivars were sown at three planting densities (4.5, 6.7, and 9.0 kg ha −1 ) over four planting dates (May through September) in 2008, 2009, 2010, and 2011. Vegetative biomass during the first year was harvested and ensiled to determine silage quality. Cultivars performed similarly over all treatments for forage yield and quality. The two highest planting densities yielded more forage, but no seed yield differences were detected. Total dry matter forage yield (DMFY) was greatest for May plantings (5.2 t DM ha −1 ), while August seeded canola yielded 2.4 t DM ha −1 . Baldur produced higher seed yield than Athena by 352 kg ha −1 , while planting dates had significant, but inconsistent effects on seed yield compared to the fall‐planted, uncut control, which averaged 2389 kg ha −1 . Fiber content of canola silage (canolage) was extremely low while crude protein (CP) remained consistently high. Canolage quality was exceedingly high, however, high silage pH indicated poor ensiling, which likely led to excessive loss of organic material in the silage that increased ash content. Early‐planted winter canola withstood multiple forage harvests without having a large impact on seed yield most years and economics indicate this may be a feasible management practice.

Crop ScienceVolume 46, Issue 2 p. 992-993 Registrations of Cultivar Registration of ‘Premier’ Spring Rapeseed J. Brown, Corresponding Author J. Brown [email protected] Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author ([email protected])Search for more papers by this authorL. Seip, L. Seip Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorJ.B. Davis, J.B. Davis Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorN. Baker, N. Baker Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author J. Brown, Corresponding Author J. Brown [email protected] Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author ([email protected])Search for more papers by this authorL. Seip, L. Seip Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorJ.B. Davis, J.B. Davis Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorN. Baker, N. Baker Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author First published: 01 March 2006 https://doi.org/10.2135/cropsci2004.0737Citations: 1 Registration by CSSA. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article. REFERENCES 1Brown, J., J.B. Davis, A.P. Brown, D.A. Erickson, and L. Seip. 1998. Registration of ‘Sunrise’ spring rapeseed. Crop Sci. 38: 542– 543. 2Christie, W.W. 1992. Preparation of fatty acid methyl ester. Inform 3: 1031– 1034. 3Hammond, E.G. 1991. Organization of rapid analysis of lipids in many individual plants. p. 321– 325. In Modern methods of plant analysis. Vol. 12. Springer-Verlag, Berlin. 4Pooni, H.S., and J.L. Jinks. 1978. Predicting the properties of recombinant lines derived by single seed descent for two or more characters simultaneously. Heredity 54: 397– 411. Citing Literature Volume46, Issue2March–April 2006Pages 992-993 ReferencesRelatedInformation

Crop ScienceVolume 45, Issue 2 p. 800-801 Registrations of Cultivars Registration of 'Athena' Winter Rapeseed J. Brown, Corresponding Author J. Brown [email protected] Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author ([email protected])Search for more papers by this authorJ.B. Davis, J.B. Davis Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorT. Gosselin, T. Gosselin Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD. Wysocki, D. Wysocki Columbia Basin Agric. Research Center, Oregon State Univ., Tubbs Ranch Road, Pendleton, OR, 97001Search for more papers by this authorS. Ott, S. Ott Columbia Basin Agric. Research Center, Oregon State Univ., Tubbs Ranch Road, Pendleton, OR, 97001Search for more papers by this author J. Brown, Corresponding Author J. Brown [email protected] Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author ([email protected])Search for more papers by this authorJ.B. Davis, J.B. Davis Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorT. Gosselin, T. Gosselin Dep. Plant, Soil and Ent. Sci., Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD. Wysocki, D. Wysocki Columbia Basin Agric. Research Center, Oregon State Univ., Tubbs Ranch Road, Pendleton, OR, 97001Search for more papers by this authorS. Ott, S. Ott Columbia Basin Agric. Research Center, Oregon State Univ., Tubbs Ranch Road, Pendleton, OR, 97001Search for more papers by this author First published: 01 March 2005 https://doi.org/10.2135/cropsci2005.0800Citations: 8 Registration by CSSA. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat References 1Auld, D.L., Registration of 'Cascade' rapeseed. Crop Sci. (1987) 27, 1309–1310 http://doi.org/10.2135/cropsci1987.0011183X002700060052x, 10.2135/cropsci1987.0011183X002700060052x Google Scholar 2Brown, J., Registration of 'Ericka' winter rapeseed. :. Crop Sci. (1997) 38, 543http://doi.org/10.2135/cropsci1998.0011183X003800020062x, Google Scholar 3Brown, J., J.B. Davis, A. Hang, and D. Wysocki. 1999. 1999 Pacific Northwest spring and winter canola variety trial results. p. 19–21. In Proc. Pacific Northwest Canola Meeting, Great Falls, MT. 6–10 Nov. 1999. Google Scholar 4Brown, J., J.B. Davis, A. Hang, and D. Wysocki. 2000. 2000 Pacific Northwest winter canola variety trial results. p. 25–27. In University of Idaho Rapeseed, Canola and Mustard Report. University of Idaho, Moscow. Google Scholar 5Brown, J., J.B. Davis, and D. Wysocki. 2001. 2000 Pacific Northwest winter canola variety trial results. p. 17–20. In Department of Plant, Soil and Entomological Sciences Research and Extension Report. University of Idaho, Moscow. Google Scholar 6Brown, J., J.B. Davis, and D. Wysocki. 2002. 2000 Pacific Northwest winter canola variety trial results. p. 1–3. In Proc. Idaho and Washington Oilseed Commission Meeting, Moscow, Idaho. February 2003. Google Scholar 7Lein, K.A., Methods for quantitative determination of seed glucosinolates of Brassica spp. and their application in plant breeding of rape low in glucosinolate content. Z. Pflanzenzuecht. (1970) 63, 137–154 Web of Science®Google Scholar Citing Literature Volume45, Issue2March–April 2005Pages 800-801 ReferencesRelatedInformation

Oilseed Bassica is susceptible to attack by the cabbage seedpod weevil while commercial yellow mustard, Sinapis alba L., is resistant. The objective of this study was to determine if canola-quality S. alba would maintain its resistance traits. In laboratory choice and nochoice tests we found the number of eggs laid by the weevil to be low or non-existent in all S. alba genotypes. Key words: Ceutorhynchus obstrictus, Ceutorhynchus assimilis, Sinapis alba, plant resistance

Phyllotreta cruciferae is an important insect pest of spring-planted Brassica crops, especially during the seedling stage. To determine the effect of early season P. cruciferae infestation on seed yield, 10 genotypes from each of two canola species (Brassica napus L. and Brassica rapa L.) and two mustard species (Brassica juncea L. and Sinapis alba L.) were grown in 2 yr under three different P. cruciferae treatments: (1) no insecticide control; (2) foliar applications of endosulfan; and (3) carbofuran with seed at planting plus foliar application of carbaryl. Averaged over 10 genotypes, B. rapa showed most visible P. cruciferae injury and showed greatest yield reduction without insecticide application. Mustard species (S. alba and B. juncea) showed least visible injury and higher yield without insecticide compared with canola species (B. napus and B. rapa). Indeed, average seed yield of S. alba without insecticide was higher than either B. napus or B. rapa with most effective P. cruciferae control. Significant variation occurred within each species. A number of lines from B. napus, B. juncea, anid S. alba showed less feeding injury and yield reduction as a result of P. cruciferae infestation compared with other lines from the same species examined, thus having potential genetic background for developing resistant cultivars.

Crop ScienceVolume 44, Issue 6 p. 2271-2272 Registrations Of Cultivar Registration of 'Pacific Gold' Oriental Condiment Mustard J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu)Search for more papers by this authorJ.B. Davis, J.B. Davis Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorT. Gosselin, T. Gosselin Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this author J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu)Search for more papers by this authorJ.B. Davis, J.B. Davis Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD.A. Brown, D.A. Brown Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorT. Gosselin, T. Gosselin Department of Plant, Soil and Entomological Sciences, University of Idaho, Moscow, ID, 83844-2339Search for more papers by this author First published: 01 November 2004 https://doi.org/10.2135/cropsci2004.2271aCitations: 19 Registration by CSSA. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Citing Literature Volume44, Issue6November–December 2004Pages 2271-2272 RelatedInformation

Spring canola (Brassica napus L.) is a new crop in the Pacific Northwest and growers have adopted cultural practices used in western Canada where spring canola (or rapeseed) must be swathed to hasten maturity and avoid frost damage. The aim of this study was to evaluate the effect of preharvest swathing on the seed yield and seed quality, and determine the best time to swath in northern Idaho, if swathing is needed. Five spring canola cultivars were planted in 1992 and 1993 to compare seed yield and quality of swathed and direct harvest crops. In 1994, commercial agricultural machinery was used in larger plots, to compare seed yield and quality from three different swathing dates with direct harvest. In 1992, directly harvested canola had higher yields than swathed canola. The following year, yield of directly harvested and swathed canola were not different. in commercial scale trials, yield loss was linearly related to time of swathing with the least reduction occurring when swathed at 60 to 80% brown seed, and most yield loss occurring when swathed at 10 to 20% brown seed. Therefore, optimal swathing time would be when most seeds were brown. Swathing canola resulted in smaller seed and greater chlorophyll content. However, swathed crops had lower seed moisture content, which may ease harvest operations. We recommend that canola should only be swathed in northern Idaho in cool and wet growing seasons, where harvest is delayed.

Canola (Brassica napus L.), yellow mustard (Sinapis alba L.) and intergeneric crosses of S. alba×B. napus were assessed for resistance (antixenosis) to the cabbage seedpod weevil (Ceutorhynchus assimilis Paykull). Pod trichomes did not appear to be a major factor in the resistance of S. alba to weevils. The number of feeding punctures and eggs per pod in S. alba was not significantly different in pods with trichomes than in those where the trichomes had been removed. Choice and no-choice laboratory tests examining feeding punctures and eggs laid per pod suggested that resistance in S. alba is not conferred in the intergeneric cross, S. alba×B. napus. Similar data on feeding and weevil oviposition were found in field test plots. However, despite many eggs being laid in S. alba×B. napus hybrid plants, fewer cabbage seedpod weevil larvae developed to exit the intergeneric hybrid pods. Glucosinolate analyses of leaves, pods and seeds showed that S. alba plants have a high concentration of p-hydroxybenzyl glucosinolate in all three plant parts, but B. napus has no p-hydroxybenzyl. Interestingly the intergeneric hybrid examined in this study had 62% and 60% of p-hydroxybenzyl concentration in the leaves and seeds, respectively, than was found in the S. alba parent. However, pod tissues contained very little (3%) compared with the S. alba parent. It is possible, therefore, that the adult cabbage seedpod weevil feeds on the pods of the intergeneric hybrid and lays eggs in the pod, because of the low concentration of p-hydroxybenzyl glucosinolate, but the larvae then fail to develop as they feed on the seeds containing high concentrations of p-hydroxybenzyl glucosinolate. It should be noted also that this hybrid produced pods that were more similar in physical shape to canola pods and that this may also be a factor determining cabbage seedpod weevil feeding and subsequent egg laying. In addition, both B. napus and the intergeneric hybrid produced 3-butenyl and 4-pentenyl glucosinolates in their pods, and degradation products (3-butenyl, and 4-pentenyl isothiocyanates) from these glucosinolate types, are known to be stimulatory kairomones that attract cabbage seedpod weevil. Further studies are being conducted to examine these factors in more detail.

Canola (edible rapeseed) crops are often infested by related weed species. This paper addresses effects that seeds from various Brassicaceae weeds may have on canola oil and meal quality. Seeds of common Brassicaceae weeds were collected from canola fields throughout northern Idaho. These were wild mustard, black mustard, birdsrape mustard, shepherd's-purse, flixweed, tumble mustard, and field pennycress. Collected seeds were physically described by weight, size, and shape and were analyzed for oil concentration, fatty acid composition, and glucosinolate concentration. Seed weights ranged from 0.1 to 2 g/1,000 seed. Oil concentration in the weed seeds ranged from 25 to 38%, with erucic acid levels ranging from less than 1 to 47%. Glucosinolate concentration in the mustard weed seeds was over 100 μmol/g oil-free meal, except for shepherd's-purse, which had only 3.4 μmol/g. Using these data, a simple model predicts that both canola oil and seed meal quality can be adversely affected by contamination with weed seeds. Increased erucic acid concentration in modeled admixtures was the most likely oil quality problem associated with weed seed contamination. Glucosinolate concentration in modeled admixtures was higher than acceptable only in those admixtures that also had erucic acid levels that exceeded canola quality standards. Canola-quality oil and seed meal can be maintained with conspicuous weed seed mixtures up to the 2% maximum allowed in U.S. No. 1 canola. However, canola-quality oil and seed meal was not achieved when a 5% weed seed mixture allowed in No. 2 canola was evaluated with the model.

The effect of late season insect infestation on seed yield, yield components, oil content and oil quality of two canola species (Brassica napus L. and B. rapa L.) and two mustard species (B. juncea L. and Sinapis alba L.) was examined over 2 years. In each year, ten genotypes from each species were evaluated with late season insects controlled with either methyl parathion or endosulfan insecticides, and without insecticides. Major late season insect damage in 1992 was caused by cabbage seedpod weevil (Ceutorhynchus assimilis Paykull), while diamondback moth (Plutella xylostella L.) and aphids (primarily cabbage aphids, Brevicoryne brassicae L.) were major insect pests in 1993. Insecticide application was very effective in controlling diamondback moth larvae and adult cabbage seedpod weevils, but only partially effective in controlling aphids. Higher numbers of diamondback moth larvae were observed on mustard species compared to canola species. S. alba was completely resistant to cabbage seedpod weevil and there was no damage due to this pest observed. Aphid colonization was observed on plants from all species, but infestation on S. alba and B. rapa occurred too late to have a major effect on seed yield. Seed oil content of canola species was significantly reduced by insect damage although oil quality (indicated by fatty acid profile) was not affected by insect attack. Uncontrolled insect infestation reduced seed yield of canola species by 37 and 32% in B. napus and B. rapa, respectively. Least yield reduction occurred in S. alba, where average yield reduction from plants in untreated control plots was <10% of insecticide treated plants. S. alba, therefore, has good potential as an alternative crop suitable for northern Idaho because it can be grown with reduced late season insecticide application.

Crop ScienceVolume 38, Issue 2 cropsci1998.0011183X003800020059x p. 541-541 Registration of Cultivars Registration of ‘IdaGold’ Yellow Mustard J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu).Search for more papers by this authorJ. B. Davis, J. B. Davis Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD. A. Erickson, D. A. Erickson Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorA. P. Brown, A. P. Brown Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu).Search for more papers by this authorJ. B. Davis, J. B. Davis Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorD. A. Erickson, D. A. Erickson Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorA. P. Brown, A. P. Brown Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this authorL. Seip, L. Seip Dep. of Plant and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author First published: 01 March 1998 https://doi.org/10.2135/cropsci1998.0011183X003800020059xCitations: 7AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article.Citing Literature Volume38, Issue2March–April 1998Pages 541-541 RelatedInformation

Spring canola acreage has increased in the Pacific Northwest over the past 5 yr, Traditional cultivars are inbred lines, although a high proportion of newer cultivars are hybrids. This study examined the magnitude of heterosis in spring canola to determine the potential advantage of hybrid cultivars. Four inbred cultivars, with diverse geo graphic origins of development, were hand-pollinated in a diallel design. Performance of F-1 hybrids and their respective inbred parents was evaluated under greenhouse conditions. Field trials were conducted at two locations to compare F-1 hybrids and F-2 progeny with inbred parents. Positive heterosis was found for yield, oil content, and oil quality, with the highest degree of heterosis observed for yield. Hybrids and F-2 progeny produced higher yield than inbred parents because of increased pod number (primarily on the main raceme), larger seeds, and later maturity, However, the magnitude of heterosis observed varied between hybrids. Inbred and hybrid cultivars also were compared in the Pacific Northwest Regional Canola Variety Trials. In these trials, the most adapted hybrids had a yield advantage compared with the most productive inbred cultivars, However, average yield and oil content of hybrids were not significantly different from inbred cultivars, Inbred cultivars tended to have higher oil content and matured earlier. Introduction of hybrid canola cultivars in the Pacific Northwest region has potential to increase canola acreage and grower profit. However, choice of hybrid parents and economics of high quality hybrid seed production will be important factors in hybrid canola cultivar development and acceptance.

Crop ScienceVolume 38, Issue 2 cropsci1998.0011183X003800020060x p. 541-542 Registration of Cultivars Registration of ‘Selkirk’ Winter Rapeseed J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Dep. of Plant, Soil and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu).Search for more papers by this authorJ. B. Davis, J. B. Davis Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorA. P. Brown, A. P. Brown Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorD. A. Erickson, D. A. Erickson Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorL. Seip, L. Seip Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorD. L. Auld, D. L. Auld Dep. of Plant, Soil and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author J. Brown, Corresponding Author J. Brown jbrown@uidaho.edu Dep. of Plant, Soil and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Corresponding author (jbrown@uidaho.edu).Search for more papers by this authorJ. B. Davis, J. B. Davis Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorA. P. Brown, A. P. Brown Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorD. A. Erickson, D. A. Erickson Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorL. Seip, L. Seip Plant and Soil Science Dep., Texas Tech Univ., Box 42122, Lubbock, TX, 79409-2122Search for more papers by this authorD. L. Auld, D. L. Auld Dep. of Plant, Soil and Entomological Sciences, Univ. of Idaho, Moscow, ID, 83844-2339Search for more papers by this author First published: 01 March 1998 https://doi.org/10.2135/cropsci1998.0011183X003800020060xCitations: 2AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article.Citing Literature Volume38, Issue2March–April 1998Pages 541-542 RelatedInformation

'Garnet' spring rapeseed [Brassica napus L. subsp. oleifera (Metzg.) Sinskaya f. annua] (Reg. no. CV-17, PI 597355) was developed for use as an industrial oil-quality cultivar by the Idaho Agricultural Experiment Station. Garnet is a near pure-line spring rapeseed cultivar with high erucic acid content in the seed oil and canola-quality seed meal. Garnet was selected for adaptability to environmental conditions of the Pacific Northwest region (Idaho, Oregon, Washington, and Montana). The cultivar was developed from a single plant selected in 1994 from an F4 population derived from the cross 'DNK.89.213'/'Hero'.DNK.89.213haslowemcicacidcontent(#) g kg") and <30 umol gof total glucosinolate in defatted seed meal; it is a selection originating from Dansk Planterforaedling, Denmark. Hero is a cultivar developed in 1989 at the University of Manitoba in Canada, with high erucic acid content (>500 g kg-') in the seed oil and low glucosinolate content (<30 umol g-) in the seed meal. FI seed from the original cross was produced in the spring of 1992. Progeny from the cross were evaluated in a multivariate cross prediction trial (4) in the greenhouse in 1992 (Fi plants) and in the field in 1993 (F2 plants). Seeds from plants in the ¥3 population were evaluated for erucic acid content in the oil using a halfseed technique (2,3). The highest erucic acid selections (those with >500 g kg-') from half-seed analyses were selfed over the winter of 1993-1994 in the greenhouse. Seed from each F4 plant was evaluated for glucosinolate content using a glucose-sensitive Testape procedure (5). Lines with very low Tes-tape scores (<0.5 units, on a scale of 0 to 5) were selected and planted in field trials as single-plant plots in 1994. A further winter seed increase was carried out from FS to Fe seed in 1994-1995. Oil and seed meal quality were re-evaluated after each increase and only plants with the highest quality were retained for re-planting. Breeder seed of Garnet was derived from a single plant selected from the Fe population grown in the greenhouse in 1994-1995. This seed was grown as Fe single-plant field plots in 1995, and prior to harvest, 30 single-plant selections were identified with the desired plant uniformity, oil content, oil and seed meal quality. In 1996, F? seed from these 30 plants were grown in single-plant plots. During the 1996 growing season, single-plant plots were visually inspected and offtype plants removed. Before harvest, 20 single-plant selections were taken from each of the 30 single-plant plots and evaluated for fatty acid profile and seed meal glucosinolate content. Four hundred single Fg plants were selected and their seeds combined to plant foundation seed in the spring of 1997. Agronomic performance of Garnet was compared with the control cultivars Hero, Reston, and R.500 in replicated plot trials over 3 yr (1994,1995, and 1996). The 1996 trials were part of the Pacific Northwest Canola Variety Trials (PNWCVT) (1). Hero and Reston are high erucic acid B. napus cultivars developed at the University of Manitoba in Canada. These cultivars account for a high proportion of the Canadian industrial-quality rapeseed acreage. R.500 is a B. rapa (yellow sarson) high erucic acid cultivar with high seed glucosinolate content, which shows poor adaptation to conditions in the Pacific Northwest. R.500 was included as control in the 1994 and 1995 trials because it is the only high erucic acid spring rapeseed cultivar commercially available to U.S. growers. Average seed yield of Garnet was 1557 kg ha over all sites and locations tested, compared with 1337, 936, and 280 kg ha" for Hero, Reston, and R.500, respectively. Seed yield of Garnet, averaged over sites within years was 1239, 1841, and 1610 kg ha from 1994,1995, and 1996, respectively, compared with the mean of the control cultivars at 838, 855, and 1343 kg ha" in the same respective years. Garnet produced higher seed yield than the highest-yielding control cultivar (Hero) at 11 of the 12 year-sites. Average oil content of Garnet was 400 g kg-, which was significantly (P < 0.05) higher than Reston (369 g kg-), but not significantly different from Hero (403 g kg-'). Erucic acid content of Garnet (490 g kg-) was significantly higher (P < 0.05) than Hero (423 g kg-) or Reston (398 g kg-). Total seed glucosinolate content of Garnet was low, averaging 7.2 umol gdefatted seed meal. Garnet plants are medium to tall (105 cm), averaging 1 cm taller than Hero. Plants mature early, at an average of 98 d after planting, compared with 97 d for Hero. Average 1000-seed weight of Garnet was 3.1 g. U.S. plant variety protection of Garnet is pending (PVP Certificate no. 9700373). Seed increases are limited to foundation and certified seed classes. Requests for seed of Garnet for commercial production can be made to the Idaho Agricultural Experiment Station, University of Idaho, Moscow, ID 83844-2331. Small amounts of seed for experimental purposes will be available from the corresponding author for at least five years.