The Genetic Characteristics of an Endangered Population of Mitella furusei var. subramosa (Saxifragaceae) from Shikoku, Japan

Yudai Okuyama; Kunihiko Uno

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The Genetic Characteristics of an Endangered Population of Mitella furusei var. subramosa (Saxifragaceae) from Shikoku, Japan

机译：濒危种米氏酵母的遗传特征日本四国的subramosa（Saxifragaceae）

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To study the genetic characteristics of an isolated population of M. furusei var. subramosa from Uwajima City, Ehime Prefecture ("Tsushima-cho" population), we conducted nucleo-tide sequencing of two plastid DNA regions {trnH-psbA intergenic spacer and matK gene) and three nuclear DNA regions (nuclear ribosomal external transcribed spacer and internal transcribed spacer [ETS and ITS], GBSSI-A0, and GBSSI-A1 genes) from the plants collected in the population. We revealed that the population has a unique genetic profile, which rules out the possibility of the origin of the population by an artificial introduction. Moreover, the present phylogenetic analyses suggested its close affinity to the populations from Kii Peninsula, Honshu. This finding may be attributable to the ancient distribution of the plants along with the ancient Kitan River system. Moreover, no genetic variation or heterozygosity was detected for all the sequenced DNA regions in the plant population. The genetic uniqueness, the poor genetic diversity, and the very scarce number of the surviving plants all indicate the urgent need for the conservation of the population.

机译：为了研究遗传特征的孤立的M. furusei var种群。我们从爱媛县宇和岛市（Tsushima-cho种群）的subramosa进行了两个质体DNA区域（trnH-psbA基因间隔子和matK基因）和三个核DNA区域（核糖体外部转录间隔子和内部核糖核酸）的核苷酸测序。从种群中收集的植物转录间隔区[ETS和ITS]，GBSSI-A0和GBSSI-A1基因）。我们发现该种群具有独特的遗传特征，通过人工引入排除了种群起源的可能性。此外，本系统发育分析表明其与本州基伊半岛的种群具有密切的亲和力。这一发现可能归因于植物的古老分布以及古老的Kitan河系。此外，未检测到植物群体中所有测序的DNA区域的遗传变异或杂合性。遗传的独特性，不良的遗传多样性以及幸存植物的数量非常稀少，都表明迫切需要保护种群。

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《Bulletin of the National Museum of Nature and Science》 |2012年第1期|19-27|共9页
作者
Yudai Okuyama; Kunihiko Uno;
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作者单位

Department of Botany, National Museum of Nature and Science, Amakubo 4-1-1, Tsukuba, Ibaraki 305-0005, Japan;

Department of Botany, National Museum of Nature and Science, Amakubo 4-1-1, Tsukuba, Ibaraki 305-0005, Japan;

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正文语种 eng
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asimitellaria; ehime prefecture; endangered species; endemic species; kitan river;

机译：imi虫爱媛县濒危物种;特有物种基坦河;

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The Genetic Characteristics of an Endangered Population of Mitella furusei var. subramosa (Saxifragaceae) from Shikoku, Japan

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