This study aimed to investigate the effects of different light qualities on the morphological development, photosynthetic characteristics, stomatal structure, and yield of potato, providing theoretical and practical guidance for optimizing light environments in controlled agricultural systems and enhancing the efficient production of potato microtubers. Six light qualities—white, red, blue, green, far-red, and ultraviolet—were applied to systematically evaluate their effects. The results showed that light quality significantly influenced plant morphological traits and physiological metabolism. Red and blue light demonstrated the most pronounced promotive effects. Under red light, plant height and stem diameter increased by 57.47% and 31.10%, respectively, compared to white light, while single tuber weight increased by 20.09%, despite a 14.96% reduction in tuber number per plant. Blue light significantly enhanced chlorophyll content (by 20.35%) and stomatal density (adaxial stomata increased by 28.85%), leading to a 38.98% increase in tuber number, a 51.79% increase in single tuber weight, and a remarkable 110.37% improvement in total yield per plant, compared to white light. In contrast, green light moderately promoted photosynthesis in lower leaves, but reduced the total yield by 39.90%. Far-red (740 nm) and ultraviolet light (390 nm) severely inhibited plant growth and failed to induce tuber formation. Correlation analysis revealed a highly significant positive relationship between chlorophyll content, net photosynthetic rate, stomatal density, and yield per plant (r = 0.96, p < 0.01). This study systematically evaluated the independent effects of single light quality on potato growth and production for the first time, clarifying the regulatory advantages of red and blue light, and providing important theoretical insights for optimizing the light environment with red and blue light to improve potato microtuber yield. Furthermore, this study provides critical data to support future research on the dynamic optimization of light quality ratio.

Potato tubers undergo greening and accumulate steroidal glycoalkaloids (SGAs) upon light exposure, posing potential food safety risks. In this study, six potato cultivars (“Favorita”, “Lucinda”, “Jizhangshu 12”, “Longshu 10”, “Qingshu 9”, and “Purple Potato”) were subjected to six light treatments (dark, UVA, blue, green, red, and white), and peel color, pigment content, SGAs, and the expression of genes related to light signaling, chlorophyll biosynthesis, and SGA biosynthesis was evaluated. Under green light, the contents of α-solanine and α-chaconine were 76.22 and 171.84 mg/kg fresh weight (FW), respectively; by contrast, their levels under blue and white light were approximately 60% higher. These effects may be mediated by the upregulation of HY5 and COP1 expression, which in turn could regulate the biosynthesis of chlorophyll-related genes (CHID, CHLI1) and SGA-related genes (HMGR, SGT1). Yellow-skinned cultivars exhibited pronounced light sensitivity (chlorophyll 18.47–18.52 mg/kg FW; SGAs up to 290.41 mg/kg FW), whereas red- and purple-skinned cultivars delayed greening through anthocyanin-mediated light attenuation. Collectively, these findings provide a framework for postharvest management and breeding, suggesting that reducing blue light while enhancing green light in spectral illumination, together with the development of anthocyanin-enriched cultivars, may serve as effective strategies to extend shelf life, mitigate food safety risks, and reduce postharvest losses.

The Trihelix transcription factor family, characterized by its unique triple-helix structure (helix-loop-helix-loop-helix), plays a significant role in plant growth, development, and responses to various abiotic stresses. Potato (Solanum tuberosum L.), as a globally important food crop, experiences significant impacts on its growth and yield due to abiotic stresses such as drought, low temperature, and salt stress. Although the functions of Trihelix transcription factors have been extensively studied in various plants, systematic analysis in potatoes remains relatively scarce. This study aims to comprehensively identify the Trihelix gene family in potatoes through bioinformatics methods and analyze their expression patterns under abiotic stresses to reveal the potential functions of this gene family in potato growth, development, and stress responses. Through genome database searches and BLAST comparisons, 35 StTrihelix genes were identified in potatoes, and phylogenetic, gene structure, functional motif, and cis-acting element analyses were conducted. The expression patterns of these genes in different tissues and under low-temperature and drought stresses were analyzed using qRT-PCR technology. Additionally, the nuclear localization of StTrihelix30 was verified through subcellular localization experiments. The results indicate that the 35 StTrihelix genes are unevenly distributed across 12 chromosomes and can be classified into five subfamilies: GT-1, GT-2, GTγ, SH4, and SIP1. Gene structure and functional motif analyses revealed high conservation within the same subfamily. Cis-acting element analysis showed that these genes are closely related to hormone responses, stress responses, and growth and development processes. Tissue expression analysis showed that StTrihelix4 is highly expressed in stamens, while StTrihelix13 is highly expressed in roots. qRT-PCR results indicated that most StTrihelix genes are significantly upregulated under low-temperature and drought stresses. This study systematically identified the Trihelix gene family in potatoes and revealed its important role in abiotic stress responses. It provides new insights into the functions of the Trihelix transcription factor family in potato growth, development, and stress adaptation, offering theoretical references for stress-resistant potato breeding.

Enzymatic browning markedly reduces the processing quality and economic value of potatoes. This study evaluated the effects of copper sulfate (CuSO4) on potato growth, yield, and enzymatic browning. Quantitative analysis of browning-related enzymes, organic acids, free amino acids, and the browning index (BI) was conducted using high-performance liquid chromatography and non-contact colorimetric technology. Moderate Cu2+ (0.078–0.157 mmol·L−1) supply enhanced photosynthetic capacity, biomass, and starch accumulation, whereas excessive Cu induced oxidative stress, increased PPO activity, phenolic accumulation, and BI. Metabolic profiling revealed that Cu2+ activates PPO via its copper-binding sites and reprograms amino acid and organic acid metabolism—upregulating arginine and proline while downregulating isoleucine, leucine, phenylalanine, lysine, citrate, and chlorogenic acid, all strongly correlated with BI. These findings highlight the dual role of copper in yield formation and enzymatic browning, introducing metabolic reprogramming as a potential mechanism for optimizing Cu fertilization to balance productivity and postharvest quality.

为筛选甘肃省2018—2019年马铃薯(Solanum tuberosum L.)品种区域试验中丰产、稳产和适应性强的品系,同时评价试点的代表性和鉴别力,本研究收集整理2018—2019年在甘肃省安定区、秦州区、渭源县、永昌县、临夏县、庄浪县6个试点种植的各育种单位育成的15个品系的产量数据,用主效可加互作可乘模型(AMMI)和基因型与环境互作分析模型(GGE)联合对产量进行基因型与环境互作分析,评价品系的丰产性、稳定性、适应性和环境的鉴别力.方差分析结果表明,马铃薯品系的产量在基因型效应(G)、环境效应(E)和互作效应(G×E)中均呈现极显著差异(P<0.01),环境效应平方和占总方差平方和最大,其次是基因型效应,互作效应占比最小.AMMI分析结果显示,丰产稳产的品系是0730-185;品系凯薯2号、0730-156和0730-185在永昌县的适应性较好,庄薯8号在安定区的适应性较好,GN-99、W1在渭源县的适应性较好,GN-99、GN-122和W1在临夏县的适应性较好;AMMI环境的鉴别力由强到弱依次为2018年的永昌县、2018年的安定区、2019年的临夏县等.GGE分析结果显示,丰产稳产的品系是GN-99;品系凯薯2号在永昌县的适应性最好,品系GN-122在渭源、安定区、秦州区、庄浪县、临夏县适应性最好;GGE环境的鉴别力由强到弱依次为2018年的永昌县、2019年的临夏县、2019年的安定区等.利用AMMI模型和GGE模型共同对甘肃省马铃薯区域试验的产量数据联合分析可以更好地评价并筛选优良品种.两种模型对基因型丰产性分析的准确性取决于其解释变异的大小,AMMI对基因型稳定性和环境鉴别力的分析优于GGE,GGE对基因型适应性分析优于AMMI.两种模型鉴定出高产稳产品种(系)有GN-99和0730-185;高适应性的品系试点组合有GN-122-临夏县、GN-122-庄浪县、GN-122-秦州区、GN-122-安定区、GN-122-渭源县、凯薯2号-永昌县;环境的鉴别力最好的两个试点为永昌县、安定区,其他试点均属于以上两试点的品种生态亚区.本研究结果为马铃薯新品种推广和后续的区域试验提供了参考.

This study mainly focused on the application of GGE (genotype + genotypes and environment interactions) biplot in potato breeding, to evaluate the productivity, stability and adaptability of yield traits of potato lines in different environments comprehensively, and screen out the excellent lines adapted to different mage-environments.The representativeness and discriminating ability of each test-environment were also evaluated, providing a basis for the selection of test-environment.A total of 101 advanced lines from International Potato Center (CIP) and potato variety Qingshu 9 were planted in Neiguan Town, Lujiagou Town and Wuzhu Town of Gansu province in 2015 and 2016 to measure the plot yield, plot yield of large-sized tubers, plot yield of small-sized tubers, yield per plant, large-sized tuber yield per plant, small-sized tuber yield per plant, tuber number per plant, large-sized tuber number per plant and small-sized tuber number per plant.The genotype and environment interactions were analyzed by the combined analysis of variance and GGE biplot.Except the plot yield of small-sized tubers had no significant difference in genotype and environment interactions effect, all the other yield components had significant differences (P < 0.01) in genotype effect, environmental effect and genotype and environment interaction effect.The square sum of environmental effect on the plot yield, plot yield of large-sized tubers, plot yield of small-sized tubers, yield per plant, large-sized tuber yield per plant, tuber number per plant, and the square sum of genotype and environment interaction effect on the plot yield of small-sized tubers, the large-sized tuber number per plant, and the small-sized tuber number per plant were worth the largest in the square sum of total variance.The most adaptable lines in Lujiagou Town were G86, in Wuzhu Town G65, in Neiguan Town G86.The high-yield lines were G86, G116, and G124; the stable-yield lines were G124, G125, and G10; the high-yielding and stable lines were G86, G116, G124, and Qingshu 9.The lines with more large-sized tuber number per plant were G45, G86, and G67, and the lines with good stability were G67, G116, and G51.The variety Qingshu 9 did not have stable large-sized tuber yield per plant.According to the comprehensive discrimination and representativeness, the order of test-environments were Lujiagou Town in 2016, Lujiagou Town in 2015, Wuzhu Town in 2015, Wuzhu Town in 2016, Neiguan Town in 2015, and Neiguan Town in 2016.GGE model can intuitively display the results in the genotype-location-year framework, and objectively evaluate the productivity, stability and adaptability of tested lines, as well as the representativeness and discriminating ability of test-environment.According to the comprehensive evaluation of GGE model, the high-yielding and stable lines were G116, G124, G125, G122, and Qingshu 9, and the high-yielding and unstable lines were G86, G10, G121, G106, G107, and G72.The most ideal mage-environment is Lujiagou Town, and Wuzhu Town is the test-environment with the strongest discriminating ability for varieties identification.

炸片是马铃薯重要的加工产品.对10个马铃薯品系进行田间农艺性状评价,并分析4℃低温储藏60 d后块茎中蔗糖、 葡萄糖、 果糖、 游离氨基酸含量以及鲜薯块茎和炸片色泽的变化.结果表明,低温储藏(4℃)60 d,不同品系还原糖含量显著不同.品系0724-11、0722-46、0724-8油炸后薯片表面色泽鲜亮均匀,ΔE值变化小且块茎糖含量和游离氨基酸含量较低,炸片加工性状优良.

The present study is the first to integrate physiological and proteomic data providing information on Fe, Mn and Zn deficiency-responsive mechanisms of potato plants in vitro.

[目的]对引进的具有优良田间农艺性状的马铃薯种质材料进行块茎及全粉色泽品质分析,探究贮藏环境对马铃薯块茎内成分及全粉色泽品质的影响,丰富全粉加工型马铃薯种质资源.[方法]将引进的11个马铃薯种质材料分别贮藏在4、25℃条件下0、60、120 d后进行块茎及全粉色泽品质分析,测定材料块茎内淀粉、可溶性糖、还原糖的含量,分析在不同贮藏条件下块茎和全粉的色泽变化特性,分析块茎内淀粉、可溶性糖、还原糖的含量与块茎和全粉色泽的相关性.[结果]试验材料在25℃贮藏120 d时块茎和全粉的色泽变化最大.短时期内60 d、4℃低温贮藏环境对马铃薯鲜薯块茎和全粉色泽影响的程度显著大于25℃贮藏环境,而在长时间120 d、4℃低温贮藏环境对马铃薯鲜薯块茎和全粉色泽的变化具有抑制效应.在贮藏过程中,马铃薯块茎色泽的变化与块茎内可溶性糖和还原糖含量显著相关,块茎内可溶性糖含量越高,其全粉的光泽度越暗.[结论]马铃薯块茎内可溶性糖含量与其全粉色泽显著相关,是判定全粉加工型品种的重要指标.引进材料中CIP301040.63和CIP397067.2是适合全粉加工的潜在品种及优良亲本材料,可有效补充我国马铃薯种质资源,有利于全粉加工型马铃薯品种的选育.

In China, potato is a kind of foreign crop lacking germplasm resource, especially the varieties grown in arid and semi-arid areas. Therefore, it is an effective way to rich the germplasm resource by introducing potatoes abroad. In this study, the Shannon-Wiener's diversity index and comprehensive score (F-value) were used to investigate the genetic diversity of 119 intro-duced potato clones from Peru International Potato Center about 10 phenotypic traits (emergence rate, plant height, stem diameter, leaf area, growth period, tuber number per plant, yield per plant, commodity rate, dry matter content and tuber length-width ratio). The genetic diversity of growth period was the most abundant among these phenotypic traits in 119 potato clones. Stem diameter, leaf area, growth period, tuber number per plant, yield per plant, commodity rate, dry matter content and tuber length-width ratio had significant effects on comprehensive value of phenotypic traits, and could be used to evaluate the potato germplasm resources on the drought farming. The F-value was significantly correlated with the economic characters (yield per plant, commodity rate and dry matter content), which can be used as the main evaluation index of potato germplasm resources. CIP393228.67 and CIP385561.124 in arid area and CIP304350.95, CIP392797.22, and CIP388615.22 in semi-arid area showed high and stable yield characteristics. These 119 introduced potato clones are rich in genetic diversity with good comprehensive evaluation, they could effectively complement potato germplasm resources and be beneficial to potato breeding in China.

[目的]研究苜蓿(Medicago Sativa)与连作马铃薯土壤浸提液对基质栽培马铃薯植株的光合、生理特性及产量的影响,以期为克服马铃薯连作障碍提供理论依据.[方法]以马铃薯品种‘新大坪’为试验材料,研究了马铃薯第4年连作田土壤浸提液与4年龄清水苜蓿土壤浸提液配比液(记为1∶1,1∶2,1∶3,1∶4,1∶5,CK-连作马铃薯土壤浸提液)对基质栽培马铃薯叶片光合参数、酶活性、叶绿素含量及产量的影响.[结果]在马铃薯盛花期,1∶2处理的SOD活性、CAT活性,比对照(CK)增加5.2％、77.8％;1∶4处理的POD活性较对照(CK)提高19％;盛花期600μmol/(m2·s)光照下,1∶3处理的净光合速率(Pn)、气孔导度(Gs)蒸腾速率(Tr)的值最大,分别比对照(CK)增加64.7％、73.3％、132.2％;盛花期1 000 μmol/(m2·s)光照下,PnGs、t先上升再降低,到达T3处理时为最大值,比对照(CK)分别增加63.6％、272.7％、162.8％.在马铃薯块茎膨大期,1∶4处理叶绿素相对含量最高,比CK提高29.9％;块茎膨大期600 μmol/(m2·s)下的1∶3处理下的Pn、G3、Tr均处于最大值,分别比对照(CK)增加64.2％、164.7％、117.1％;块茎膨大期1 000 μmol/(m2·s)光照下,1∶3处理的Tr比CK显著提高69.6％.1∶3处理马铃薯产量最高,较CK提高19.3％.[结论]不同浓度比例的连作马铃薯土壤浸提液与清水苜蓿土壤浸提液可有效改善马铃薯光合生理特性,并能提高马铃薯产量,尤以1∶3处理最佳.

The canopy-air temperature difference can reflect the physiological adaptability of plants under drought stress. In this study, drought tolerant varieties Jizhangshu 8 and Longshu 10, drought sensitive varieties Atlantic and Shepody, and ten potato clones with different drought tolerance levels from Peru International Potato Center were used to measure plant phenotypic traits (plant height, leaf area, leaf fresh weight, normalized difference vegetation index), photosynthetic indexes (photosynthetic rate, stomatal conduc-tance, transpiration rate, chlorophyll content) and the canopy-air temperature difference, and evaluated the drought tolerance under semi-arid and semi-humid environments. The canopy-air temperature difference, transpiration rate and stomatal conductance were most sensitive to drought stress. The canopy-air temperature difference was significantly different among different potato varieties (clones) under semi-arid and semi-humid environments. The drought tolerance coefficient of canopy-air temperature difference showed significantly positive correlations with drought tolerance coefficients of plant phenotypic characters and photosynthetic in-dexes. The canopy-air temperature difference is an effective indicator to evaluate potato drought tolerance by using infrared ther-mometers, which could provide a theoretical basis for the research of potato drought tolerance breeding.

[目的]为解决我国西北地区旱地全膜双垄沟播玉米在大喇叭口和抽雄时期传统追肥存在劳动强度大、不易吸收等问题,设计了一种直插式液态施肥机.[方法]采用凸轮-曲柄连杆机构组合式设计,利用反转法根据顶杆的运动规律设计了凸轮的轮廓曲线.借助ADAMS软件对施肥针运动进行模拟,得到施肥针速度-时间关系曲线和运动轨迹.[结果]机具行驶速度为0.53 m/s时,喷肥针入土和出土时水平分速度为0.53 m/s,施肥间距为300 mm,最大施肥深度为115 mm,施肥轨迹符合实际工况.[结论]该施肥机可实现直插施肥,满足全膜双垄沟播玉米施(追)肥作业的农艺技术要求.

以马铃薯品种"大西洋"的试管苗为材料,在5个不同镁浓度(0、188、375、750、1500μmol·L-1)的MS培养基上培养,20 d后测定生理和形态指标,研究了低镁胁迫对马铃薯试管苗叶绿素含量和碳水化合物积累与分配以及根系形态建成的影响.结果表明:试管苗的总叶绿素、叶绿素a(Chla)和叶绿素b(Chlb)含量以及根冠比、总根长、根表面积、根体积和侧根数均为缺镁(0μmol·L-1)处理最低,分别比对照(1500μmol·L-1)降低42.3％、40.8％和46.2％以及96.4％、63.9％、54.1％、82.4％和89.9％;平均根直径和Chla/Chlb值为缺镁处理最高,分别较对照增加16.7％和9％;茎叶中淀粉、蔗糖、果糖和可溶性糖含量以及根中蔗糖、果糖和可溶性糖含量均为缺镁处理最高,分别比对照增加了58.5％、54.8％、59.7％和25.9％以及22％、46.7％和54.7％,而根中淀粉含量为缺镁处理最低,较对照降低32.8％.相关性分析表明,马铃薯试管苗茎叶中淀粉、果糖和可溶性糖含量与镁浓度均呈显著负相关.说明缺镁影响马铃薯试管苗的光合作用和碳水化合物代谢,大量碳水化合物在茎叶中积累,向根部的运输量减少,侧根形成减少,根冠比降低,抑制根系的形态建成.低镁水平下(750μmol·L-1)试管苗的叶绿素含量增加,更多的碳水化合物向根部运输,根冠比增大,促进根系的形态建成,与正常镁水平(1500μmol·L-1)下马铃薯试管苗指标变化相同,差异不显著,表明含750μmol·L-1 Mg2+的MS培养基适宜于马铃薯试管苗的生长和发育.

To investigate the effect of different dosages UV-C treatment on CAT activity,POD activity,PAL activity,MDA concentration and the inhibition of potato dry rot.The potato tubers during storage were taken as a material,treated with UV-C irradiation dose at O,5,15,25,35 and 45 kJ · m-2.The results showed that the activity of MDA and PAL in tubers were significantly decreased and the activity of POD was significantly increased by 5 ～ 45 kJ · m-2,UV-C irradiation dose with 5 kJ · m-2 could increase the activity of CAT in potato tuber after inoculation,irradiation dose of 5 ～ 45 kJ · m-2 could effectively inhibit the diffusion of potato tubule spot diameter,The optimum irradiation dose was at 35 kJ· m-2 for all concerned.This study confirmed that UV-C irradiation was helpful to improve the resistance of potato tuber to dry rot during storage.The results provided a theoretical reference for the use of UV-C as a new environmentally friendly potato storage method.

地膜覆盖播种技术依赖于精密穴播机.甘肃省地处西北丘陵山区,大型农业机械作业困难,而小型农机发展相对不足,迫切需要适用于山区小地块播种的小型精密穴播机.因此,设计了一种手推式小型精密穴播机.该播种机采用外置式种箱和窝眼轮式精量排种器,能够有效避免种子拥堵和精量播种;采用齿轮传动,排种器排种和鸭嘴开启同步进行.田间试验结果表明:播种机播种深度合理,空穴率、穴粒数合格率等均合格,满足作物播种农艺要求.

This study investigated the morphological and physiological traits of eight transgenic potato (Solanum tuberosum L.) lines carrying AtNHX1 gene and one non-transgenic control "Gannongshu No.2" grown on normal soil and saline land at 0.56％ salt and 0.29％ salt concentration.The salt tolerance of transgenic potato was evaluated using a comprehensive evaluation method including subordinate function,correlation analysis and cluster analysis.The result showed that with the increase of salt concentration the plant height,leaf area expansion rate,yield per plant,chlorophyll content,activity of SOD and the rising range of proline content of transgenic lines were higher 1.17 ～ 3.96 times than that of the control.However,the increasing degree of MDA,relative conductivity of transgenic lines was significant lower than that of control,only 63.07％ ～78.4％ and 82.7％ ～ 86.35％ of the control.A transgenic potato line with highest salt tolerance and three transgenic lines with higher salt tolerance were screened out according to the comprehensive evaluation on the morphological,physiological and biochemical parameters.The transgenic lines with different degree of salt tolerance were as follows:19 ＞ 15 ＞ 8 ＞ 4 ＞ 18 ＞ 2 ＞ 1 ＞ 6 ＞ CK.The result concluded that the salt tolerance of transgenic potato grown in field can be improved by introducing AtNHX1 gene,and the comprehensive evaluation method can be used to screen out transgenic potato with high salt tolerance.

选择马铃薯品种大西洋和甘农薯5号的悬浮细胞为研究对象,通过分析其在5℃、20℃及40℃环境下的细胞相对生长量、 质膜离子渗漏率、 细胞活力值、 渗透调节物质质量分数、 光合系统ⅡFv/Fm来阐明马铃薯在温度胁迫下的生理适应机制.结果表明,不同马铃薯品种对温度胁迫的适应性不同,环境温度为5℃时马铃薯悬浮细胞的生长状态最好.

[目的]沟垄覆膜种植模式是克服马铃薯连作障碍、提高降水利用效率和农田生产力的有效途径,在半干旱区必须选择最佳的沟垄覆膜模式.[方法]依托4 a大田定位试验,测定平畦覆膜(T1)、全膜垄播(T2)、全膜沟播(T3)、半膜垄播(T4)、半膜沟播(T5),平畦不覆膜(CK)6种模式下连作马铃薯植株SPADR、相对含水量、酶活性、光合特性和荧光参数,明确马铃薯产量.[结果]连作条件下,沟垄覆膜种植马铃薯叶片SPADR、相对含水量、SOD和CAT活性均高于CK,其中T3处理显著高于CK,盛花期增幅分别为9.37％,9.31％,166.74％和230.77％,薯块膨大期增幅分别为26.56％,15.56％,203.21％和207.54％;薯块膨大期P n,G s,T r,F v/Fm,ΦPSI和qP均高于CK,T3处理增幅最大,分别为50.21％,150.00％,58.43％,17.47％,54.86％和7.79％;各处理游离Pro,Ci,F0和MDA均低于CK,其中T3处理显著低于CK,分别为46.88％,20.92％,4.54％和63.72％;另外,沟垄和覆膜处理均能提高马铃薯产量,增产幅度为32.43％～42.98％,其中T3处理产量最高并且与CK差异显著.[结论]沟垄覆膜种植模式均可提高连作马铃薯光合能力和产量,其中全膜双垄沟播模式效果最好.

[Objective] French fries are the main important potato processing products.The compositions of potato tuber are effected by storage environments after harvest.The change of the tuber compositions affects the features of physio-chemical characteristics of in tubers resulted in potato processing colour and texture.The French fry quality of potato should be analyzed and classified according to the commercially processing criteria.Firstly,screening of French fries processing potato lines according to agronomic traits in fields.Then,analyzing potato tuber processing colour and texture qualities from varieties and advanced lines according to current consumption habits and market demand.The above standards are important required for French fry varieties screening purpose.[Method] Selection at an early breeding stage,characteristics with agronomic traits such as yield,tuber size,tuber shape,tuber colour,eye depth,tuber length,tuber width,ratio of tuber length to width,diseases resistance and commodity rate were evaluated based on three different locations in three years.Fourteen potato varieties and lines were selected for French fry qualities test after storage for 0,60,and 120 days at 4 ℃ and 25 ℃,respectively.The contents of dry matter,starch,total glycoalkaloid,sucrose,reducing sugars,free amino acids,chlorogenic acid,ascorbic acid,citric acid were measured.In addition,the French fry colour change,the tuber and French fry hardness were determined and analyzed.A correlation analysis was conducted to determine the correlation coefficient between the content of starch and the hardness.[Result] In regard to tuber shape,the processing standard for French fry is long to long-oval.A longaxis to transverse-axis ratio greater than 1.5∶1 is acceptable.The ratios refer to variety characteristics as a mean value,not to natural variations in shape which may occur within a variety.Tubers should be uniform and not excessively disfigured by secondary growth,enfolded ends or growth cracks.The values of ΔE reflected the change of French fry colour under different storage environments.The correlation analysis indicated that the changes of colour were caused mainly by fructose,glucose,and secondly by chlorogenic acid.The content of ascorbic acid was correlated only with brightness colour parameter,L value.The content of fructose,glucose,sucrose,chlorogenic acid had a positive significant correlation with a and b values.There was a positive correlation between hardness and tuber starch content in fresh tuber and French fry.The decrease of hardness was caused mainly by the water loss and starch degradation.[Conclusion] The present results indicated that after field agronomic traits screening,colour and texture evaluation under different storage environments,the varieties Russet Burbank,Shepody and lines 0719-32,0716-39 are the better French fry processing potato varieties and lines.