分蘖数是高粱重要的农艺性状之一。笔者通过微卫星重复序列(simple sequence repeat, SSR)分子标记,以T70× P607杂交得到的F6代重组自交系(recombinant inbred lines, RIL)群体构建遗传连锁图,运用复合区间作图法(composite interval mapping, CIM),对分蘖数进行数量性状基因座(quantitative trait locus, QTL)分析,在第1、2、4、5和6号染色体上检测到7个与分蘖数相关的QTL,解释性状表型变异在1%～13%之间,所得到的QTL全为超显性。
Abstract
The number of tillers in sorghum is an important agriculture trait. In this study, the F6 recombinant inbred lines(RIL)population derived from the hybridization of sorghum lines T70×P607 was used to construct genetic linkage map by simple sequence repeat(SSR)markers. Seven quantitative trait locus(QTLs)for tillers number were located on chr01, chr02, chr04, chr05 and chr06 by using composite interval mapping(CIM)approach. Contribution ratio of QTLs for tillers number of sorghum was 1%-13%. The genetic modes of actions of all QTLs detected were over dominant.
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基金
收稿日期:2012-02-08 修回日期:2012-04-16
基金项目:教育部创新团队项目(IRT020)
第一作者:董维,硕士生。*通信作者:杨永华,教授。E-mail: yangyh@nju.edu.cn。
引文格式:董维,苏舒,游录鹏,等. 高粱F6代群体分蘖数的QTL定位[J]. 南京林业大学学报:自然科学版,2013,37(2):55-58.
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