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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (8): 1622-1636.doi: 10.16420/j.issn.0513-353x.2022-0537

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Study on Genetic Characteristics and Taxonomic Status of Wild Chinese Chestnut Based on Genome Re-sequencing

NIE Xinghua, ZHANG Yu, LIU Song, YANG Jiabin, HAO Yaqiong, LIU Yang, QIN Ling*(), XING Yu*()   

  1. Beijing Key Laboratory for Agricultural Application and New Technique,College of Plant Science and Technology, Beijing University of Agriculture,Beijing 102206,China
  • Received:2023-02-16 Revised:2023-04-21 Online:2023-08-25 Published:2023-08-23
  • Contact: QIN Ling, XING Yu

Abstract:

The cluster analysis of 194 chestnut resources was performed based on SSR molecular markers,and the botanical characteristics of wild chestnut resources were described and compared. Forty-six representative wild and cultivated Chinese chestnut resources were selected for re-sequencing analysis,and phylogenetic and population structure analyses were performed. The clustering results showed that wild Chinese chestnuts and cultivated Chinese chestnuts had a close genetic distance,they were mixed and no obvious division;population structure analysis also further supported that wild Chinese chestnuts and cultivated Chinese chestnuts had the consistent genetic information,revealing cultivated Chinese chestnut may be domesticated from wild Chinese chestnut in situ for a limited time. This study clarified the taxonomic status of wild chestnut,namely:wild Chinese chestnut and cultivated Chinese chestnut belong to the same species. It is clear that the habit of female flower bunching is not a characteristic of wild Chinese chestnut,and a more accurate and up-to-date boundary range of wild Chinese chestnut is proposed.

Key words: Chinese chestnut, wild resource, SSR, re-sequencing, phylogeny, population structure