作物学报2012，Vol.38Issue(6)：954-961,8.DOI:10.3724/SP.J.1006.2012.00954
鲁麦14对山东新选育小麦品种的遗传贡献
Genetic Contribution of Lumai 14 to Novel Wheat Varieties Developed in Shandong Province
摘要
Abstract
Lumai 14 is a semi-dwarf high-yield wheat variety developed in the mid of 1980s, which is also a backbone parent of more than 40 wheat varieties released in China. This study aimed to understand the genetic contribution of Lumai 14 to its deri-vate varieties and lines at the genomic level. Using 350 SSR markers covering the whole wheat genome, the alleles of Lumai 14 were screened in six Lumai 14 derivants and Yannong 15 (another parent of Qingfeng series). A total of 662 alleles were obtained on the 350 loci, and each locus had 1-5 alleles with an average of 1.9 alleles. The polymorphism information content (PIC) was 0.21. In the UPGMA dendrogram, Jimai 22 and Lumai 14 were clustered together firstly, and further grouped with Qingfeng series. Jimai 20 showed relative large genetic distance to the backbone parent. The derivants of Lumai 14 shared common loci with their parents with percentages of 67.1% (235/350) for Jimai 22, 60.0% (210/350) for Jimai 20, 65.4% (229/350) for Qingfeng 1, and 70.6% (247/350) for Qingnong 2. Most of these loci were assembled on 21 chromosomes, and some of them, such as regions gwm304-barc360-gwm415-barcl on chromosome 5A and bare 196-gdm127-barc 123 on chromosome 6D, were shared in six Lumai 14 derivants. In Jimai 22, alleles inherited from Lumai 14 varied among chromosomes, and chromosomes 3A, 4A, 7A, 2B, 4B, 7B, 1D, 3D, and 4D contained more than 70% of Lumai 14 alleles, whereas chromosome 3B showed the lowest percentage of 46%. These alleles from Lumai 14 were mainly distributed in several regions on each chromosome, which proved to harbor genes/QTLs for important traits in QTL analysis and association analysis. Therefore, we conclude that the elite background of Lumai 14 contributed greatly to Jiraai 22. In breeding practices, background selection should be highly considered besides the transmission of elite target genes.关键词
鲁麦14/济麦22/SSR标记/聚类分析/遗传贡献Key words
Lumai 14/ Jimai 22/ SSR/ Clustering Analysis/ Genetic contribution引用本文复制引用
盖红梅,李玉刚,王瑞英,李振清,王圣健,高峻岭,张学勇..鲁麦14对山东新选育小麦品种的遗传贡献[J].作物学报,2012,38(6):954-961,8.基金项目
本研究由国家现代农业产业体系建设项目(CARS-3-1-2)和青岛市科技计划项目(09-1-1-69-nsh,10-3-4-14-1-jch)资助. （CARS-3-1-2）
