Main Effect QTL with Dominance Determines Heterosis for Dynamic Plant Height in Upland Cotton
文献类型: 外文期刊
作者: Shang, Lianguang 1 ; Ma, Lingling 1 ; Wang, Yumei 1 ; Su, Ying 1 ; Wang, Xiaocui 1 ; Li, Yuhua 1 ; Abduweli, Abdugheni 1 ; Cai, Shihu 1 ; Liu, Fang 1 ; Wang, Kunbo 1 ; Hua, Jinping 1 ;
作者机构: 1.Laboratory of Cotton Genetics, Genomics and Breeding, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China
2.Institute of Cash Crops, Hubei Academy of Agricultural Sciences, Wuhan 430064, China
3.Institute of Cotton Research, Chinese Academy of Agricultural Sciences/State Key Laboratory of Cotton Biology, Anyang 455000, China
关键词: Upland cotton;plant height;QTL;heterosis;backcross population
期刊名称:G3-GENES GENOMES GENETICS ( 影响因子:3.154; 五年影响因子:3.369 )
ISSN: 2160-1836
年卷期: 2016 年 6 卷 10 期
页码:
收录情况: SCI
摘要: Plant height, which shows dynamic development and heterosis, is a major trait affecting plant architecture and has an indirect influence on economic yield related to biological yield in cotton. In the present study, we carried out dynamic analysis for plant height and its heterosis by quantitative trait loci (QTL) mapping at multiple developmental stages using two recombinant inbred lines (RILs) and their backcross progeny. At the single-locus level, 47 QTL were identified at five developmental stages in two hybrids. In backcross populations, QTL identified at an early stage mainly showed partial effects and QTL detected at a later stage mostly displayed overdominance effects. At the two-locus level, we found that main effect QTL played a more important role than epistatic QTL in the expression of heterosis in backcross populations. Therefore, this study implies that the genetic basis of plant height heterosis shows dynamic character and main effect QTL with dominance determines heterosis for plant height in Upland cotton.
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