小麦骨干亲本南大2419对衍生品种(系)HMW-GS的贡献分析  

The Analysis of HMW-GS Evolution in Mentana and its Derivatives

作　　者：相吉山[1,2] 杨欣明[1] 李秀全[1] 刘伟华[1] 高爱农[1] 李立会[1] 马晓岗[3] 

机构地区：[1]中国农业科学院作物科学研究所/国家农作物基因资源与基因改良重大科学工程,北京100081 [2]新疆农垦科学院作物研究所/谷物品质与遗传改良兵团重点实验室,石河子832000 [3]青海大学,西宁810016

出　　处：《植物遗传资源学报》2013年第6期1053-1058,1063,共7页Journal of Plant Genetic Resources

基　　金：农业部作物种质资源保护项目(NB07-2130135-(25-30)-21);新疆兵团青年科技创新资金(2013CB022);新疆农垦科学院引导计划(44YYD201204)

摘　　要：南大2419是我国小麦育种的骨干亲本之一。为了了解南大2419对衍生品种(系)HMW-GS的贡献,本研究利用SDS-PAGE技术对南大2419及其99个衍生品种(系)的HMW-GS组成与演变进行了分析。结果表明,南大2419 HMW-GS组成为N/7+8/2+12,品质得分7分。衍生品种(系)的平均品质得分7.62分,高于亲本南大2419;其中N/7+8/2+12组合的品种占45.45%,且该类型在每一代都是优势组合。南大2419 HMW-GS在后代中得到了较好的遗传,在子一代到子四代中,Null、7+8、2+12亚基出现的频率均高于50%,最高可达100%。衍生品种(系)中,12个大面积推广的品种都具有与南大2419相同的丰产性高、适应性好和抗性强的优点,但HMW-GS均不是优质组合。说明骨干亲本南大2419由于本身品质上的局限,对其衍生品种在品质遗传改良上的贡献很小,其主要贡献是传递丰产性状。Mentana is one of the backbone parents in wheat breeding of China. In order to investigate the con- tribution of Mentana in quality breeding, the HMW-GS combination and evolution of Mentana and its derivatives were analyzed by SDS-PAGE. The results showed that the HMW-GS combination of Mentana was N/7 ＋ 8/2 ＋ 12 and its quality score was 7. The average quality score of the derivatives was 7.62, which was higher than Men- tana. 45.45% derivatives carried the same HMW-GS as Mentana, and it was dominant in every generation. The he- redity of HMW-GS from Mentana was stable, and its frequency was over 50% , and even 100% in the first to the fourth generation. Twelve Mentana-derived varieties planted in large areas had same merits as Mentana such as high yield,good adaptability,and strong disease resistance. The results indicated that the backbone parent Mentana con- tributed little in quality, but more in stripe rust resistance and high yield potential.

关 键 词：南大2419 骨干亲本 衍生品种 HMW—GS 品质 

分 类 号：S512.1[农业科学—作物学]