期刊
THEORETICAL AND APPLIED GENETICS
卷 133, 期 11, 页码 3139-3150出版社
SPRINGER
DOI: 10.1007/s00122-020-03660-7
关键词
-
资金
- National Key Research and Development Program of China [2016YFD0100303, 2018YFD0100100]
- National Nature Science Foundation of China [31771796]
Key message qKRN8, a major QTL for kernel row number in maize, was fine mapped to an interval of similar to 520 kb on chromosome 8 and the key candidate gene was identified via expression analysis. Kernel row number (KRN) is one of the most important yield-influencing traits and is closely associated with female inflorescence development in maize (Zea mays L.). In this study, an F-2:3 population derived from a cross between V54 (low KRN line) and Lian87 (high KRN line) was used to map quantitative trait loci (QTLs) conferring KRN in maize. We identified 12 QTLs for KRN in four environments, each explaining 1.40-14.95% of phenotypic variance. Among these, one novel major QTL (named qKRN8) was mapped to bin 8.03 in all four environments, explaining 8.79-14.95% of phenotypic variation. By combining map-based cloning with progeny testing of recombinants, we ultimately mapped qKRN8 to an similar to 520 kb genomic interval, harboring six putative candidate genes. Among them, one candidate gene showed contrasted expression level in immature ears of the near-isogenic lines qKRN8(Lian87) and qKRN8(V54). These findings should facilitate molecular breeding for KRN and the further identification of the polymorphism underlying this QTL.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据