作物学报2016，Vol.42Issue(4)：482-491,10.DOI:10.3724/SP.J.1006.2016.00482
利用单片段代换系测交群体定位玉米产量相关性状的杂种优势位点
Identification of Heterotic Loci for Yield and Ear Traits Using CSSL Test Population in Maize
摘要
Abstract
Heterosis plays an important role in enhancing crop yield and quality. Dissecting the genetic basis of heterosis can promote hybrid maize selection, however it is unclear up to now. In this study, a set of chromosome segment substitution lines (CSSLs) population, which was constructed using the inbred line lx9801 as the receptor parent and the inbred line Chang 7-2 as the donor parent, was crossed with the inbred line T7296 to construct the corresponding test population. The test population was used to identify the heterotic loci (HL) for grain yield and ear traits in maize, which showed significant difference in heterosis between the corresponding chromosomal region of the inbred line Chang 7-2 and lx9801 as well as the test inbred line T7296. A total of 64 HL were identified for gain yield and ear traits, and among them 23 HL were identified at the two environments simul-taneously, including 4 HL for ear length, 4 HL for ear width, 4 HL for row number, 7 HL for kernels per row, and 4 HL for grain yield. Additionally, the HL for both grain yield and its components simultaneously were found on many chromosomal regions. This study could offer a basic material for thoroughly dissecting the genetic basis of heterosis for grain yield and its components in maize.关键词
玉米/染色体片段代换系/产量/杂种优势/数量性状位点Key words
Maize/Chromosome segment substitution lines/Grain yield/Heterosis/Quantitative trait loci引用本文复制引用
彭倩,薛亚东,张向歌,李慧敏,孙高阳,李卫华,谢慧玲,汤继华..利用单片段代换系测交群体定位玉米产量相关性状的杂种优势位点[J].作物学报,2016,42(4):482-491,10.基金项目
本研究由国家自然科学基金项目(31271732)资助。This study was supported by the National Natural Science Foundation of China （31271732）
