Quantitative Trait Locus Mapping Combined with RNA Sequencing Reveals the Molecular Basis of Seed Germination in Oilseed Rape

文献类型： 外文期刊

第一作者： Yu, Kunjiang

作者： Yu, Kunjiang;He, Yuqi;Li, Yuanhong;Li, Zhenhua;Tian, Entang;Zhang, Jiefu;Wang, Xiaodong

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关键词： Brassica napus; seed germination; quantitative trait locus; transcriptome; molecular basis

期刊名称：BIOMOLECULES （ 影响因子：6.064； 五年影响因子：6.191 ）

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年卷期： 2021 年 11 卷 12 期

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收录情况： SCI

摘要： Rapid and uniform seed germination improves mechanized oilseed rape production in modern agricultural cultivation practices. However, the molecular basis of seed germination is still unclear in Brassica napus. A population of recombined inbred lines of B. napus from a cross between the lower germination rate variety 'APL01' and the higher germination rate variety 'Holly' was used to study the genetics of seed germination using quantitative trait locus (QTL) mapping. A total of five QTLs for germination energy (GE) and six QTLs for germination percentage (GP) were detected across three seed lots, respectively. In addition, six epistatic interactions between the QTLs for GE and nine epistatic interactions between the QTLs for GP were detected. qGE.C3 for GE and qGP.C3 for GP were co-mapped to the 28.5-30.5 cM interval on C3, which was considered to be a novel major QTL regulating seed germination. Transcriptome analysis revealed that the differences in sugar, protein, lipid, amino acid, and DNA metabolism and the TCA cycle, electron transfer, and signal transduction potentially determined the higher germination rate of 'Holly' seeds. These results contribute to our knowledge about the molecular basis of seed germination in rapeseed.

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