摘要
利用由 98个家系组成的Nipponbare/Kasalath//Nipponbare回交重组自交系 (backcrossinbredlines,BIL)作图群体(BC1F9) ,以及混合线性模型的数量性状位点 (QTL)定位方法 ,对水稻有效穗、每穗颖花数、每穗实粒数、结实率、千粒重、着粒密度和单株产量等 7个重要农艺性状进行了QTL分析。共检测到分布在 8条染色体上的 2 6个QTL ,其贡献率差异较大 ,在 5 2 %～ 4 9 2 %之间 ,其中有 4个QTL的贡献率超过 30 % ,分别是控制有效穗的qPN 4、每穗颖花数的qSN 3、每穗实粒数qGN 2和千粒重的qGW 3a。相关显著的产量性状QTL往往分布在染色体上相同区域 ,并集中在少数几个连锁群上。与其他研究结果比较表明 ,主效QTL在不同群体中的重演性较好。
A mapping population of 98 BC 1F 9 lines(backcross inbred lines,BIL),derived from a backcross of Nipponbare(Japonica)/Kasalath(Indica)//Nipponbare by the single seed descent methods,was employed to map quantitative trait loci(QTL)underlying such rice characters as panicle number per plant(PN),spikelet number per panicle(SN),grain number per panicle(GN),seed setting rate(SSR),1000 grain weight(GW),spikelet density(SD)and grain yield per plant(GY)by mixed linear approaches.Atotal of 26 QTL for seven yield related traits were detected which distributed on eight chromosomes;the variances explained by each QTL ranged from 5 2%～49 2%.There were 4 QTL explaining more than 30% of total phenotypic variations individually,which were qPN?4 controlling PN,qSN?3 controlling SN,qGN?2 conferring GN and qGW?3a conferring GW.Correlated traits often have QTL sharing the same chromsome locations.Comparison among different studies revealed that QTL with large effect are easy to be detected in different populations and environments.
出处
《南京农业大学学报》
CAS
CSCD
北大核心
2002年第2期1-6,共6页
Journal of Nanjing Agricultural University
基金
教育部优秀骨干教师基金
农业部超级稻研究计划 (Q2 0 0 0 2 5 )
江苏省自然科学基金 (Q2 0 0 0 3 6)
