关键词: Pueraria evolution genome population genomics selection sweep

Mesh : Pueraria / genetics Genome, Plant Genetic Variation Phylogeny Evolution, Molecular

来  源:   DOI:10.1093/dnares/dsae017   PDF(Pubmed)

Abstract:
Pueraria montana var. lobata (P. lobata) is a traditional medicinal plant belonging to the Pueraria genus of Fabaceae family. Pueraria montana var. thomsonii (P. thomsonii) and Pueraria montana var. montana (P. montana) are its related species. However, evolutionary history of the Pueraria genus is still largely unknown. Here, a high-integrity, chromosome-level genome of P. lobata and an improved genome of P. thomsonii were reported. It found evidence for an ancient whole-genome triplication and a recent whole-genome duplication shared with Fabaceae in three Pueraria species. Population genomics of 121 Pueraria accessions demonstrated that P. lobata populations had substantially higher genetic diversity, and P. thomsonii was probably derived from P. lobata by domestication as a subspecies. Selection sweep analysis identified candidate genes in P. thomsonii populations associated with the synthesis of auxin and gibberellin, which potentially play a role in the expansion and starch accumulation of tubers in P. thomsonii. Overall, the findings provide new insights into the evolutionary and domestication history of the Pueraria genome and offer a valuable genomic resource for the genetic improvement of these species.
摘要:
蒙大拿州葛根var。lobata(P.lobata)是一种传统的药用植物,属于豆科的葛属。蒙大拿州葛根var。thomsonii(P.thomsonii)和蒙大拿州葛根。蒙大拿州(P.蒙大拿州)是其相关物种。然而,葛属的进化史在很大程度上仍然未知。这里,高度诚信,报道了P.lob的染色体水平基因组和改进的P.thomsonii基因组。它发现了三个葛属物种中古老的全基因组重复和最近的全基因组重复的证据。121份葛根种质的种群基因组学研究表明,葛根种群具有较高的遗传多样性,和P。thomsonii可能是通过驯化为亚种而衍生自P。选择扫描分析确定了与生长素和赤霉素合成相关的Thomsonii种群中的候选基因,这可能在P.thomsonii的块茎的膨胀和淀粉积累中起作用。总的来说,这些发现为葛根基因组的进化和驯化历史提供了新的见解,并为这些物种的遗传改良提供了宝贵的基因组资源。
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