摘要
A RIL population was used in this study, which was derived from a cross between a temperate maize germplasm inbred line B31-1 and a tropical maize germplasm inbred lines Huangzao 4. A genetic linkage map was constructed comprising of 153 polymorphic markers. Among the 153 polymorphic markers, 82 markers showed the significantly segregation distortion（P〈0.05）, favoring either the marker alleles of female parent 1331-1（62.50%） or male parent Huangzao 4（37.50%）. Segregation distortion marker distribution along the present molecular maps of maize was far from uniform, with clusters of tightly linked loci and single marker. Nine segregation distortion regions were detected on 10 chromosomes, indicating that possible causes for segregation deviation of molecular markers are genetic selection.
以热带玉米自交系B31-3与温带自交系黄早四杂交得到的F8代重组自交系群体为材料,筛选出153个多态性SSR标记,以此为基础构建遗传连锁图谱。对这些多态性标记进行偏分离分析,发现48个表现为偏分离(P<0.05),这些偏分离标记中有30个标记位点偏向母本B31-3,占62.50%,18个标记位点偏向父本黄早四,占37.50%。这些偏分离标记在图谱上的分布有2种:成簇分布和孤立位点的偏分离。在10条不同染色体上共发现9个偏分离热点区域。这些偏分离热点区域的形成可能与配子体选择有关。
基金
Supported by the Fund for Breeding and Commercial Seed Production of Functional Maize Materials(cstc2016shms-ztzx80013)
the Fund for Commercial Seed Production Innovation of New Silage Maize Varieties(cstc2016shms-ztzx80015)
the Fund for Breeding and Mechanized Production of High-quality and High-Yield Silage Maize Varieties in Southwest China(2016YFD0300309-4)
Chongqing basic scientific research fund in 2016(Discovery and Application of Key Gene for Selenium Accumulation in Maize Grains)~~
