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首页> 外文期刊>Biochemical Systematics and Ecology >Extremely low levels of genetic variation in the critically endangered monotypic fern genus Mankyua chejuense (Ophioglossaceae) from Korea: Implications for conservation
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Extremely low levels of genetic variation in the critically endangered monotypic fern genus Mankyua chejuense (Ophioglossaceae) from Korea: Implications for conservation

机译：来自韩国的极度濒危单型蕨类植物Mankyua chejuense（Ophioglossaceae）的遗传变异极低：对保护的意义

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摘要

We investigated allozyme variation in 16 populations of the rare monotypic fern Mankyua chejuense and 11 populations of a closely related, widespread fern Botrychium ternatum. Genetic diversity was extremely low in the critically endangered M. chejuense (%P-s = 10%, A(s) = 1.13, and H-es = 0.007) relative to that found in B. ternatum (%P-s = 22.7%, A(s) = 1.23, and H-es = 0.026). We detected homozygous genotypes for alternative alleles at a few loci, which suggests occurrence of intragametophytic self-fertilization. High degrees of population differentiation were found in both M. chejuense (F-ST = 0.245) and B. ternatum (F-ST = 0.414). The extremely low levels of genetic diversity in M. chejuense would be attributable to inbreeding coupled with random genetic drift and rarity. In situ protection of habitats of standing populations and ex situ preservation of several populations are suggested for the development of conservation strategies for M. chejuense
机译：我们调查了罕见的单型蕨类植物Mankyua chejuense的16个种群和密切相关，分布广泛的蕨类Botrychium ternatum的11个种群中的同工酶变异。相对于白三叶草（％Ps = 22.7％，A（），极度濒危的M. chejuense（％Ps = 10％，A（s）= 1.13，H-es = 0.007）的遗传多样性极低。 s）= 1.23，H-es = 0.026）。我们在几个位点检测到了替代等位基因的纯合基因型，这表明配子体内自体受精的发生。在che.enseum。（F-ST = 0.245）和B. ternatum（F-ST = 0.414）中都发现了高度的群体分化。 Chejuense支原体中极低的遗传多样性水平可归因于近亲繁殖以及随机遗传漂移和稀有性。建议对立种群的栖息地进行原地保护并对数个种群进行异地保护，以开发化学支原体的保护策略。

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