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利用SSR标记探讨骨干亲本欧柔在衍生品种的遗传
引用本文:李小军,徐鑫,刘伟华,李秀全,李立会.利用SSR标记探讨骨干亲本欧柔在衍生品种的遗传[J].中国农业科学,2009,42(10):3397-3404.
作者姓名:李小军  徐鑫  刘伟华  李秀全  李立会
作者单位: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
基金项目:国家重点基础发展研究计划(973计划) 
摘    要: 【目的】研究骨干亲本欧柔染色体片段在衍生后代的分布及所关联的性状,旨在揭示骨干亲本对后代品种的遗传贡献。【方法】对小麦骨干亲本欧柔及其衍生的23份在中国生产和育种中发挥重要作用的后代品种进行农艺性状调查和SSR扫描。【结果】在43个SSR位点欧柔特异等位变异在一代品种的传递频率高于理论比例0.38; 在41个位点欧柔特异等位变异在二代品种的传递频率高于理论比例0.18;在21个位点欧柔特异等位变异被持续选择(在2个子代的分布频率分别大于0.38和0.18)。SSR标记与农艺性状关联分析表明,在Xwmc710、Xbarc235和Xbarc252位点,欧柔等位变异类型在后代具有高的分布频率且与较高的穗粒数、产量相关。【结论】推测本研究发现的重要染色体区域及相关的优异性状在中国小麦品种改良中发挥了重要作用,是进一步研究的重点。

关 键 词:小麦  骨干亲本  染色体位点  选择  关联分析
收稿时间:2009-01-04;

Genetic Diversity of the Founder Parent Orofen and Its Progenies Revealed by SSR Markers
LI Xiao-jun,XU Xin,LIU Wei-hua,LI Xiu-quan,LI Li-hui.Genetic Diversity of the Founder Parent Orofen and Its Progenies Revealed by SSR Markers[J].Scientia Agricultura Sinica,2009,42(10):3397-3404.
Authors:LI Xiao-jun  XU Xin  LIU Wei-hua  LI Xiu-quan  LI Li-hui
Institution:(The National Key Facility for Crop Gene Resources and Genetic Improvement (NFCRI), Institute of Crop Science, Chinese Academy of Agricultural Sciences)
Abstract:【Objective】 The main objective is to uncover the genetic contribution of founder parent to its offspring through tracking chromosomal regions of Orofen in its progeny. 【Method】 Orofen and its 23 representative progenies were analyzed using morphological traits in five environments and microsatellite markers. 【Result】 The frequencies of the alleles which were amplified in Orofen but absent in other 4 parental accessions (Jinan 4, Beijing 8, 54405 and Heine Hvede) at 43 SSR loci were higher than the theoretical ratio 0.38 in the first generation; the frequencies of the alleles which were amplified in Orofen but absent in other 6 parental accessions (Jinan 4, Beijing 8, 54405, Heine Hvede, Lovrin 10 and Lovrin 18) at 41 SSR loci were higher than the theoretical ratio 0.18 in the second generation; at twenty-one of the found loci above, the unique alleles amplified only in Orofen have been selected continuously in the both generations. Association mapping indicated that the alleles according to Orofen which occurred in most progenies at the loci Xwmc710, Xbarc235 and Xbarc252 were associated with higher grain number and yield when compared with the remaining amplified alleles at the same loci. 【Conclusion】 It was speculated that the genomic region detected and associated traits played an important role for the improvement of wheat in China and could be acted as the emphases for further study.
Keywords:wheat  founder parent  chromosomal loci  selection  association mapping
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