Identification and physical mapping of QTLs associated with flowering time in Brassica napus L.
文献类型： 外文期刊
作者： Yu, Kunjiang 1 ; Wang, Xiaodong 1 ; Li, Wenjing 3 ; Sun, Lijie 1 ; Peng, Qi 1 ; Chen, Feng 1 ; Zhang, Wei 1 ; Guan, Rongz 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Ind Crops, Key Lab Cotton & Rapeseed, Minist Agr, Nanjing 210014, Jiangsu, Peoples R China
2.Guizhou Univ, Coll Agr, Guiyang 550025, Guizhou, Peoples R China
3.Jiangsu Inst Sci & Technol Informat, Nanjing 210042, Jiangsu, Peoples R China
4.Nanjing Agr Univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Jiangsu, Peoples R China
关键词： Brassica napus L; Flowering time; QTL; Physical mapping
期刊名称：EUPHYTICA （ 影响因子：1.895； 五年影响因子：2.181 ）
ISSN： 0014-2336
年卷期： 2019 年 215 卷 10 期
页码：
收录情况： SCI
摘要： Flowering time regulation is crucial to yield of rapeseed (Brassica napus L.). However, insight into the loci controlling flowering time variation in rapeseed is not clear enough. In this study, a recombinant inbred line population was used for quantitative trait locus (QTL) analysis associated with flowering time in five different environments. A total of 36 identified QTLs were obtained, and each explained 3.96-24.41% of the phenotypic variation (PV). The QTL meta-analysis showed that 36 identified QTLs were integrated into 24 consensus QTLs. Of these, eight consensus QTLs were stably expressed in at least two environments, and four with PV >= 10% were specifically expressed in a single environment-these 12 consensus QTLs were considered the key QTLs controlling flowering time in the AH population. Physical mapping indicated that the 12 key QTLs were mapped into 12 single genomic fragments in B. rapa and B. oleracea, and physical positions of these QTLs in the B. napus genome were further determined by referring to the B. rapa and B. oleracea genomes. Ultimately, seven candidate genes underlying the confidence intervals of five key QTLs were identified. These findings will contribute to further insight into the genetic architecture of flowering time in rapeseed.
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