绿豆11个农艺性状相关基因的QTL定位
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作者单位:

1 中国农业科学院作物科学研究所;2 黑龙江八一农垦大学农学院;3 中国农业科学院甘薯研究中心

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基金项目:

国家重点研发计划(2019YFD1001303,2019YFD1001300);国家现代农业产业技术体系(CARS-08);河北省现代种业科技创新专项 (21326305D)


Identification of QTL Associating with Eleven Agronomic Traits in Mungbean(Vigna radiata L.)
Author:
Affiliation:

1.Institute of Crop Sciences,Chinese Academy of Agricultural Sciences;2.College of Agriculture, Heilongjiang Bayi Agricultural University

Fund Project:

National Key Research & Development Program of China (2019YFD1001303,2019YFD1001300),China Agriculture Research System of MOF and MARA-Food Legumes (CARS-08),Science and Technology Innovation Project of Hebei Seed Industry(21326305D)

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    摘要:

    绿豆是我国传统的杂粮作物,遗传研究基础薄弱,优异基因发掘和资源利用效率低下。本研究在前期 SNP 高密度 遗传连锁图谱的基础上,基于重组自交系群体的株高、主茎分枝、荚长、荚宽、单荚粒数、种皮色、种皮光泽、籽粒分布密度、初 花期、叶绿素含量、百粒重等 11 个表型性状的数据调查分析及 QTL 定位研究。结果表明,绿豆种皮色为简单单基因控制,种 皮光泽的遗传则较为复杂,数量性状中除百粒重外均不符合正态分布。11 个性状共检测到 20 个 QTL,分布在 8 个连锁群的 14 个非重叠区间。其中 LG5、LG3、LG10 分别检测到多个性状相关 QTL,且定位区间重合。荚宽检测到的 QTL 最多,分别位于 LG1、LG5、LG7 和 LG11,表型贡献率为 5.5%~12.3% 不等。单荚粒数、种皮光泽、种皮色及主茎分枝则各检测到单个 QTL,其中 种皮光泽(LG5)和种皮色(LG4)QTL 位点的表型贡献率分别是 61.0% 和 69.7%。结合 KEGG 和 SNP 变异分析,发现 18 个与 农艺性状有关的候选基因。本研究结果将有助于提升绿豆分子遗传学研究水平,为新基因发掘及分子标记辅助育种奠定基础。

    Abstract:

    As a traditional pulses crop in China,mungbean(Vigna radiata)plays important roles in diversifying human diets,fertilizing soils and disaster relief. However,compared with those major crops,the genetic and genomic study on mungbean has been far lagged,leading to a low efficient use of beneficial genes in breeding and a slow advance in genetic improvement of cultivars. By taking advantage of a RIL population with highdensity SNP genetic map,eleven agronomic traits(plant height,the number of branches per stem,pod length, pod width,the number of seeds per pod,seed color,seed luster,grain density,initial flowering time,content of chlorophyll and 100-seed weight)were investigated and mapped in this study. The results showed that the seed color was controlled by a single nucleus-encoded gene,whereas the segregation of seed luster became much complicated. For quantitative traits,a normal distribution on the frequency of 100-seed weight was observed. For 11 traits,20 QTLs were revealed from 14 genomic regions on 8 linkage groups. QTLs at LG3,LG5 and LG10 were both detected with multiple traits,and the target regions were overlapped. Four QTLs were detected with pod length,explaining 5.5%-12.3% of phenotypic variations. For the traits number of seeds per pod,seed luster,seed color and number of branches per stem,one QTL per trait was detected. The major QTLs for seed color and seed luster contributed 69.7% and 61.0% on phenotypic variation,respectively. Gained from annotation using KEGG and SNP variations,18 genes were proposed to be candidates associating with these 11 traits. Collectively,these results provided a basis for future characterizing these candidate genes and marker-assisted selection in mungbean breeding.

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贾 龙,王 洁,王素华,等.绿豆11个农艺性状相关基因的QTL定位[J].植物遗传资源学报,2022,23(2):442-449.

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  • 收稿日期:2021-10-21
  • 最后修改日期:2021-12-14
  • 录用日期:2021-12-29
  • 在线发布日期: 2022-03-09
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