Estimation of demographic history of Japanese and Taiwanese populations in Prunus mume using SSR marker genotypes

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  • Numaguchi Koji
    Graduate School of Agricultural Science, Kobe University Japanese Apricot Laboratory, Wakayama Fruit Tree Experiment Station
  • Kitamura Yuto
    Japanese Apricot Laboratory, Wakayama Fruit Tree Experiment Station
  • Ishikawa Ryo
    Graduate School of Agricultural Science, Kobe University
  • Ishii Takashige
    Graduate School of Agricultural Science, Kobe University

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Other Title
  • SSRマーカー遺伝子型に基づく日本と台湾のウメの過去の集団動態の推定

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Abstract

Prunus mume Sieb. et Zucc. (conventionally called Japanese apricot, Chinese mei and mume) is a deciduous fruit tree species in the genus Prunus. More than 300 P. mume cultivars are distributed mainly in East Asia, including Japanese fruit, small-fruit and ornamental cultivars and Taiwanese cultivars. In order to estimate demographic history of three Japanese and one Taiwanese subpopulations, approximate Bayesian computation analysis was carried out using 20 SSR genotype datasets of 53 cultivars (20 fruit, 8 small-fruit, 20 ornamental and 5 Taiwanese cultivars). At first, the best fitting model (posterior probability: 0.501) was estimated among six probable scenarios, and median values of demographic parameters were computed. The generation time for P. mume cultivars was assumed to be seven years (full reproductive age) for time conversion. In the best scenario, Japanese and Taiwanese populations had first diverged at 10360 (95% confidence interval (CI): 2079-56910) years ago, followed by the separation of ornamental cultivars among Japanese populations at 3633 (95% CI: 1218-12740) years ago, and final differentiation between fruit and small-fruit cultivars at 2387 (95% CI: 623-6258) years ago. Although the divergence times were roughly estimated, the results suggest that Japanese and Taiwanese populations were separated through the geographic isolation with different climate conditions, and ornamental, fruit and small-fruit cultivars were recently differentiated based on human preference in Japan.

Journal

  • Journal of Crop Research

    Journal of Crop Research 65 (0), 31-35, 2020

    The Society of Crop Science and Breeding in Kinki, Japan

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