Evaluation of genetic diversity of <I>Zostera japonica</I> Aschers. & Graebn. populations located in Tottori prefecture

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  • HODOKI Yoshikuni
    Research Center for Coastal Lagoon Environments, Shimane University
  • OHBAYASHI Kako
    Research Center for Coastal Lagoon Environments, Shimane University
  • MIYAMOTO Yasushi
    Tottori Prefectural Institute of Public Health and Environmental Science
  • TANAKA Norio
    Tsukuba Botanical Garden, National Museum of Nature and Science
  • KUNII Hidenobu
    Research Center for Coastal Lagoon Environments, Shimane University

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Other Title
  • 鳥取県のコアマモ (<I>Zostera japonica</I> Aschers. et Graebn.) 個体群の遺伝的多様性
  • 鳥取県のコアマモ(Zostera japonica Aschers. et Graebn.)個体群の遺伝的多様性
  • トットリケン ノ コアマモ(Zostera japonica Aschers. et Graebn.)コタイグン ノ イデンテキ タヨウセイ
  • Evaluation of genetic diversity of Zostera japonica Aschers. ^|^amp; Graebn. populations located in Tottori prefecture

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Abstract

To evaluate current genetic diversities and further conservation efforts affecting the brackish water angiosperm, Zostera japonica Aschers. & Graebn., we carried out microsatellite analysis of three populations located in Tottori prefecture. The three populations consisted of one, four or 13 genotypes (genets), and the genotypic and genetic diversities were low compared with previously studied related species such as Z. noltii and Z. marina. Moreover, outcrossing reproduction but not self-reproduction was speculated by multi locus genotypes observed in one population in Lake Nakaumi. Observed heterozygosities were not significantly lower than expected in all populations. These results suggested that seed propagation was limited in the populations studied, and vegetative propagation was primarily involved in maintaining the populations. Moreover, limitations in seed propagation were not only caused by environmental factors, but might also be related to the breeding system or genetic factors such as inbreeding depression.

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