核农学报2012，Vol.26Issue(7)：975-982,8.
不同水分条件下水稻苗期根系性状的QTL分析
QTL MAPPING FOR ROOT TRAITS IN RICE SEEDLINGS UNDER DIFFERENT WATER SUPPLY CONDITIONS
摘要
Abstract
A recombinant inbred line(RIL) population with 234 lines derived from a super hybrid rice Xieyou 9308 were treated with normal water condition and 20% polyethylene glycol(PEG-6000).Eight root traits including the maximum root length,total root length,root surface area,root volume,root average diameter,number of root tip,root fresh weight and root/shoot ratio were measured and further used for QTL analysis.A total of 21 QTLs were detected and each locus explained 4.80%-11.35% of phenotypic variance.7 QTLs on chromosome 2,3,9,10 and 11 under normal water condition and 14 QTLs on chromosome 2,3,5,6,9 under drought stress were detected,respectively.The QTLs detected under the two water supply conditions had significant differences,which indicated that there was different genetic mechanism controlling rice root traits at the two different water conditions.Two important QTL clusters on chromosome 3 and 6 for root traits were detected,especially the QTL for seedling root traits detected between RM6283 and RM7370 on chromosome 3 had linkage relation with the QTLs for drought resistance and yield related traits.It would be possible to improve multiple traits using DNA makers closely linked to these QTLs.关键词
水稻/根系性状/干旱胁迫/QTLKey words
rice/root traits/drought stress/QTL分类
农业科技引用本文复制引用
翟荣荣,冯跃,王会民,陈艳丽,吴伟明,占小登,沈希宏,戴高兴,杨占烈,曹立勇,程式华..不同水分条件下水稻苗期根系性状的QTL分析[J].核农学报,2012,26(7):975-982,8.基金项目
浙江省重大科技专项“8812”计划 （）
农业部超级稻研究计划 （）
