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首页> 外文期刊>Plant direct. >Genomic analysis reveals rich genetic variation and potential targets of selection during domestication of castor bean from perennial woody tree to annual semi-woody crop
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Genomic analysis reveals rich genetic variation and potential targets of selection during domestication of castor bean from perennial woody tree to annual semi-woody crop

机译：基因组分析揭示了富含群落木制树的蓖麻驯化期间富含遗传变异和潜在的选择目标。

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Relatively, little is known about the genetic variation of woody trees during domestication. Castor bean (Ricinus communis L. Euphorbiaceae) is a commercially important nonedible annual oilseed crop and differs from its wild progenitors that have a perennial woody habit. Although castor bean is one of the oldest cultivated crops, its domestication origin, genomic variation, and potential targets of selection underlying domestication traits remain unknown. Here, we performed a phylogenetic analysis, which suggests that the wild accessions were distinctively separated from the cultivated accessions. Genome sequencing of three accessions (one each wild, landrace, and cultivar) showed a large number of genetic variants between wild and cultivated castor bean (ZB306 or Hale), and relatively few variants between cultivar ZB306 and Hale. Comparative genome analysis revealed many candidate genes of selection and key pathways potentially involved in the transition from a perennial woody tree to annual crop. Interestingly, among 16 oil-related genes only three showed evidence of selection and the remainder showed low genetic variation at the population level, suggesting strong purifying selection in both the wild and domesticated gene pools. These results extend our understanding of the origin, genomic variation, and domestication, and provide a valuable resource for future gene-trait associations and castor bean breeding.? 2019 The Authors. Plant Direct published by American Society of Plant Biologists, Society for Experimental Biology and John Wiley & Sons Ltd.
机译：相对较少，对驯化期间木质树的遗传变异很少。蓖麻（Ricinus Communis L. Euphorbiaceae）是一种商业上重要的非可爱年种油籽作物，与其野生祖养料不同，具有多年生的木质习惯。虽然蓖麻籽是最古老的栽培作物之一，其驯化起源，基因组变异以及潜在的选择目标潜在的驯化特征仍然未知。在这里，我们进行了系统发育分析，这表明野生载体与栽培的栽培较小。基因组测序三种加入（每个野生，兰德和品种）在野生和栽培蓖麻籽（ZB306或HALE）之间显示了大量遗传变异，以及品种ZB306和HALE之间的变种相对较少。比较基因组分析揭示了许多候选的选择和关键途径，可能涉及从多年生木本树到年度作物的过渡。有趣的是，在16种有关基因中只有三个出现的选择证据和剩余部分在人口水平上显示出低遗传变异，表明野生和驯养基因库中的强烈纯化选择。这些结果延长了我们对原产地，基因组变异和驯化的理解，并为未来的基因特征和蓖麻籽育种提供了有价值的资源。 2019年的作者。植物直接发表美国植物生物学家，实验生物学学会和约翰瓦里和儿子有限公司

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