Quantitative trait loci mapping for kernel row number using chromosome segment substitution lines in maize.
Quantitative trait loci mapping for kernel row number using chromosome segment substitution lines in maize.
复制标题
DOI：
10.4238/2014.january.17.1
复制
发表时间：
2014-03
期刊：
影响因子：
--
通讯作者：
Fenge Li;Haitao Jia;Leichao Liu;C. X. Zhang;Zhijie Liu;Z. Zhang
中科院分区：
文献类型：
--
作者：
Fenge Li;Haitao Jia;Leichao Liu;C. X. Zhang;Zhijie Liu;Z. Zhang
揭示粮食产量及其相关性状的遗传结构，有助于指导作物的遗传改良。穗粒行数是玉米产量的重要组成部分，直接影响玉米的产量。本研究以农西531为供体亲本，H21为受体亲本，通过连续回交和自交，构建了130个染色体片段代换系（CSSLs）。通过逐步回归分析，在3种环境条件下共检测到11个KRN数量性状位点，单个QTL解释的表型变异率为9.87 ~ 19.44%。所有11个QTL也通过单因素方差分析在3个测试环境中检测到。在这11个QTL中，有4个在2个以上的环境中被鉴定出来，表明它们在不同环境下真实表达，控制玉米雌花序KRN的形成和发育。与H21相比，CSSLs具有更多的KRN有利等位基因，可以作为玉米育种计划中的H21改良系。
Unveiling the genetic architecture of grain yield and yield-related traits is useful for guiding the genetic improvement of crop plants. Kernel row number (KRN) per ear is an important yield component, which directly affects the grain yield of maize. In this study, we constructed a set of 130 chromosome segment substitution lines (CSSLs), using Nongxi531 as the donor parent and H21 as recipient parent, by continuous backcrossing and selfing. In total, 11 quantitative trait loci (QTL) were detected for KRN by stepwise regression under 3 environmental settings, with 9.87-19.44% phenotypic variation being explained by a single QTL. All 11 QTL were also detected by single-factor ANOVA across the 3 environments tested. Of these 11 QTL, 4 were identified across more than 2 environments, indicating that they are authentically expressed under different environments to control the formation and development of KRN in female maize inflorescences. The CSSLs harbored a greater number of favorable alleles for KRN compared to the H21 line, and could be employed as improved H21 lines in maize breeding programs.