A transposon insertion in FLOWERING LOCUS T is associated with delayed flowering in Brassica rapa

文献类型： 外文期刊

第一作者： Zhang, Xueming

作者： Zhang, Xueming;Meng, Lin;Liu, Bo;Hu, Yunyan;Cheng, Feng;Liang, Jianli;Wang, Xiaowu;Wu, Jian;Aarts, Mark G. M.

作者机构：

关键词： Flowering time;Brassica rapa;Quantitative trait locus (QTL);FLOWERING LOCUS T;Loss-of-function allele

期刊名称：PLANT SCIENCE （ 影响因子：4.729； 五年影响因子：5.132 ）

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收录情况： SCI

摘要： Long days and vernalization accelerate the transition from vegetative growth to reproductive growth in Brassica rapa. Bolting before plants reach the harvesting stage is a serious problem in B. rapa vegetable crop cultivation. The genetic dissection of flowering time is important for breeding of premature bolting-resistant B. rapa crops. Using a recombinant inbred line (RIL) population, we twice detected two major quantitative trait loci (QTLs) for flowering time in two different growing seasons that were located on chromosomes A02 and A07, respectively. We hypothesized that an orthologue of the Arabidopsis thaliana FLOWERING LOCUS T (FT) gene, named as BrFT2, was the candidate gene underlying the QTL localized to A07. A transposon insertion in the second intron of BrFT2 was detected in one of the parental lines, which was predicted to generate a loss-of-function allele. Transcription analysis revealed that the BrFT2 transcript was not present in the parental line that harbored the mutated allele. RILs carrying only the mutated BrFT2 allele showed delayed flowering regardless of growing seasons when compared to RILs carrying the wild-type BrFT2 allele. These data suggest that BrFT2 is involved in flowering time regulation in controlling flowering time in B. rapa. (C) 2015 Elsevier Ireland Ltd. All rights reserved.

分类号： Q94

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