Abstract ‘NeoTrinity’ ( Oryza sativa L.; Reg. no. GP‐156, PI 710320) is a blast‐resistant, premium‐quality, long‐grain rice germplasm developed by the Texas A&M AgriLife Research and Extension Center, Beaumont, TX, through marker‐assisted backcrossing by introgressing the blast resistance Pib gene into the ‘Trinity’. Foreground selection identified 44 of 139 BC 2 F 2 plants as homozygous for Pib . Background selection showed that these lines shared 82%–95% genetic similarity with Trinity, given the shared pedigree between Trinity and the Pib donor, ‘Saber’. All their trait marker alleles were identical to Trinity except for the introgressed Pib gene. Agronomic and disease evaluations in 2024 and 2025 identified 17 Texas inbred lines (TILs) with grain yields ranging from 6039 to 7247 kg ha −1 , comparable to Trinity. These TILs were semidwarf, non‐lodging, and headed ∼1 week later than Trinity. Under high blast disease pressure in 2025, the TILs had lower neck blast ratings, ranging from 0.0 to 2.5, with a mean of 1.1, compared with Trinity's rating of 5.0. Three high‐yielding and highly blast‐resistant TILs (TIL24099, TIL24109, and TIL24088) were advanced for grain quality evaluation. The chalky grain percentages of the three TILs (1.2%–3.9%) were lower than those of ‘Presidio’ (6.0%) and Trinity (7.0%). TIL24088 showed stable whole milled rice recovery across years, and its grain dimensions were most similar to those of Trinity. TIL24088 was selected for release as NeoTrinity because it combines high grain yield, improved grain quality, and superior blast resistance.
Abstract Developing genetic populations is a fundamental task in the molecular mapping of many important agronomic traits, especially those determined by multiple genes and environmental factors. In this study, barley ( Hordeum vulgare L. subsp. vulgare ) genotypes—a feed barley variety, ‘Golf’, developed in England and a malting barley variety, ‘95SR316A’, bred in the United States—were used to develop a recombinant inbred line (RIL) population named ‘ID21’ ( H. vulgare L. subsp. vulgare; Reg. no. MP‐5, NSL 558939 MAP). A total of 219 RILs were generated via the single seed descent method and genotyped using the barley 50K single nucleotide polymorphism array platform. We observed segregation of morphological traits, including leaf sheath and auricle colors, among the RILs, and detected a single quantitative trait locus (QTL) associated with both traits on barley chromosome 7H that explained 87% of the variance. Five markers were found within the QTL confidence interval spanning a 3‐cM genetic distance. Adult‐plant resistance to barley stripe rust was evaluated in the field, with >60% of the RILs showing resistance responses. Seed of the 219 RILs has been deposited in the USDA National Plant Germplasm System, and the genotyping data are also publicly available, providing valuable resources for mapping complex traits and improving barley genetics.
Abstract ‘S12‐1362’ (Reg. no GP‐554, PI709600) is an F 4 ‐derived maturity group V conventional soybean [ Glycine max (L.) Merr.] germplasm with enhanced flood tolerance at the early reproductive R1–R2 growth stages. This germplasm was released by the University of Missouri‐Fisher Delta Research, Extension, and Education Center in 2025. S12‐1362 was derived from the cross S05‐11482 × RIL 159 (S99‐2281 × PI 408105A) and carries two flood‐tolerant quantitative trait loci (QTLs) inherited from PI 408105A. S12‐1362 has an indeterminate growth habit, a white flower, tawny pubescence, and tan pod wall color. Its seed has a yellow cotyledon, intermediate luster, and a black hilum. Irrigated yield trials in 26 environments indicated that S12‐1362 has high seed yield potential, providing105%, 86%, and 103% of the check's means on clay (3775 kg ha −1 ), loam (3839 kg ha −1 ), and sandy soil (3827 kg ha −1 ) environments, respectively. Under flooding conditions, S12‐1362 outperformed the checks in 4‐year flood yield trials on a zero‐grade, poorly drained, heavy clay soil (1389 kg ha −1 ), exceeding the mean yields of the commercial checks (605 kg ha −1 ) and that of the flood‐susceptible check (411 kg ha −1 ). This germplasm line carries two QTLs for flood tolerance, on chromosomes 3 and 13, from PI 408105A. Given its elite background and improved flood tolerance, S12‐1362 can serve as a promising donor line for breeding high‐yielding, flood‐tolerant soybean varieties.
Abstract The soybean [ Glycine max (L.) Merr.] breeding program at the University of Missouri‐Fisher Delta Research, Extension, and Education Center has developed and released ‘S16‐13165’ (Reg. no. CV‐571, PI710416). It is a conventional, non‐GM, Maturity Group IV soybean germplasm (Relative Maturity 4.8). S16‐13165 was evaluated across 99 environments in seven states between 2017 and 2024. Across multi‐environment yield trials, S16‐13165 exhibited competitive and stable performance, yielding 96% of the check average and 104% of the non‐Xtend check average, with strong regional adaptation in southern environments. In drought‐specific trials across four states (from 2021 to 2024), S16‐13165 demonstrated superior performance under both irrigated and rainfed conditions, with average yields of 4417 and 3302 kg ha −1 , respectively, along with a moderate canopy wilting score, indicating a favorable drought‐stress response and yield stability across environments. Moreover, it showed strong resistance to soybean cyst nematode (HG Types 1.2.5.7, 0, and 2.5.7), along with complete resistance to southern stem canker. These performance metrics indicate that S16‐13165 is a broadly adapted soybean germplasm with strong drought adaptation, competitive yield, and resistance to major abiotic stresses.
Abstract Arkot 1510a (Reg. no. GP‐1177, PI 710314), Arkot 1510b (Reg. no. GP‐1178, PI 710315), Arkot 1511 (Reg. no. GP‐1179, PI 710316), and Arkot 1519 (Reg. no. GP‐1180, PI 710317) are conventional cotton ( Gossypium hirsutum L.) germplasm lines released by the Arkansas Agricultural Experiment Station in 2026. Arkot 1510a and Arkot 1510b are sister lines derived from crossing UA222 with Ark 0615‐49, a breeding line derived from crossing Arkot 9706 and Arkot JJ46. Arkot 1511 was derived from a cross between UA222 and LA 11309060. Arkot 1519 was derived from crossing Arkot 0409 and an undisclosed industry line. In replicated field tests at three Arkansas sites over 4 years, the four lines produced higher lint yields than UA222 and UA48. Arkot 1510b produced higher lint yields but lower fiber quality than Arkot 1510a. Wide adaptation of the lines was indicated by the high lint yields of the lines in the 2023 Regional Breeders Testing Network and Regional High Quality tests. The four Arkot lines displayed high resistance to bacterial blight and equal or higher resistance to tarnished plant bugs than UA222. Arkot 1519 was later maturing than UA222, while the range of maturity of the other three lines was between that of UA222 and UA48. Plant (leaf, stem, and bract) trichomes varied among the lines, with Arkot 1510b being more similar to UA48, while the other three resembled UA222. Yield component values of the four lines tended to be closer to UA222 than to UA48. Fiber quality of Arkot 1510a and Arkot 1511 was equal to that of UA48, while the quality of the other two was closer to that of UA222.
