山东农业科学2016，Vol.48Issue(9)：10-16,7.DOI:10.14083/j.issn.1001-4942.2016.09.003
不同水分环境下小麦株高性状 QTL 定位分析
QTL Mapping Analysis for Plant Height Traits in Wheat under Different Water Environments
摘要
Abstract
Plant height is one of the most important traits that associated with drought resistance of wheat.In order to explore the gene sites associated with drought resistance and water saving,and provide guidance for drought -resistant breeding of wheat,the plant height QTL was evaluated with the population of 302 recombinant inbred lines derived from a cross between drought -tolerant cultivar Luohan 2 and water -sensitive cultivar Weimai 8 in 6 different water regimes.Total 17 additive QTL loci for plant height were iden-tified,and they distributed on chromosomes 2B,3A,3B,4A,5A,5D,6B,7A and 7B,respectively.These QTL loci could explain the phenotypic variations varied from 3.3160% ~26.9489% with the additive effects of 1.9196 ~5.3828 cm.Of which,14 QTL loci were detected for 25 times in 3 irrigation environments (E1, E2 and E3),and 5 QTL loci were detected for 7 times in 3 drought stress environments (E4,E5 and E6).Of all the 17 QTL loci for plant height,12 QTL loci were detected only in irrigation environment,3 QTL loci were detected only in drought stress environment,and 2 QTL loci were detected in both environments.It suggested that the expression of these genes were greatly influenced by environmental condition,and showed that there was interaction between gene expression and environment on the level of QTL.qPh -WL -7A.3,which was located between Xbarc049 and Xgwm273 on 7A,could stably express in all the three drought stress environ-ments,and increase plant height for 2.4815 ~3.6972 cm with the contributions of additive effects as 8.6426% ~10.0711%.It indicated that the QTL was closely related to water efficient utilization and could be used in the genetic improvement of drought tolerance and molecular marker assisted breeding of wheat.关键词
小麦/株高/QTL/干旱胁迫Key words
Wheat/Plant height/QTL/Drought stress分类
农业科技引用本文复制引用
任艳云,王霖,王世充,邵敏敏,孙雷明,黄玲,赵凯,徐兴科,王继峰,冯维营..不同水分环境下小麦株高性状 QTL 定位分析[J].山东农业科学,2016,48(9):10-16,7.基金项目
济宁市科技发展计划项目“节水高产小麦新品种选育” （）
