作物学报2007，Vol.33Issue(2)：223-229,7.
多环境下水稻DH群体剑叶长度的QTL分析
QTL Analysis for Flag Leaf Length in a Rice DH Population under Multi Environments
摘要
Abstract
A double haploid rice population from IR64/Azucena was used to dissect the quantitative inheritance of flag leaf length The QTL mapping method based on mixed linear model approaches was employed for detecting QTLs with additive and epistatic effects as well as their QE interaction effects in 4 years The results revealed that altogether 18 QTLs for leaf length were detected on 11 chromo somes, and all of them were involved in epistasis Three QTLs were involved in epist asis but without detectable additive effects, such loci might play the role of modifying agents that tend to activate other loci or modify the action of other loci The same locus could get involved in interactions with more than one other locus, as might indicate the possibility of multi-QTL associations in the forma ti on of complex traits. QTL and epistasis could have both genetic main effects that expressed stably in every environment and QE interaction effects. Some QT Lshad QE effects under multi-environments but without genetic main effect, asmight suggest expression of this kind of QTLs could bemodified by environmental factors easily. And also some QTLs had only genetic main effect, so would not easily be affectedby environment. Epistasis had wider range of epistasis×environme nteffects than that of main effects, might indicate that some digenic interactio ns were more easily subjected toenvironmental influence. Compared with indirec tmapping method with QE effects but without epistatic effects, more QTLs were detected in the present study, but no major QTL was found The QE effects weretre ated as random effects, so the sum of QE effects would be zero in theory, and multi environments were suitable for estimating genetic main effects better.关键词
数量性状位点/上位性效应/环境互作效应/水稻剑叶长度Key words
Quantitative trait locus (QTL)/Epistatic effects/QTL by environment interaction effects/Flag leaf length of rice分类
农业科技引用本文复制引用
曹刚强,高用明,朱军..多环境下水稻DH群体剑叶长度的QTL分析[J].作物学报,2007,33(2):223-229,7.基金项目
Supported by the National Natural Science Foundation of China(39893354) （39893354）
