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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic diversity in Eremostachys superba Royle ex Benth. (Lamiaceae), an endangered Himalayan species, as assessed by RAPD
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Genetic diversity in Eremostachys superba Royle ex Benth. (Lamiaceae), an endangered Himalayan species, as assessed by RAPD

机译：Benth的Eremostachys superba Royle的遗传多样性。 RAPD评估的一种濒危喜马拉雅物种（唇形科）

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摘要

Eremostachys superba Royle ex Benth. (Lamiaceae) has undergone a severe decline in population size since its discovery in the North-western Himalayas in late 19th century. One hundred and seventy-two plants from six populations in the Indian states of Uttar Pradesh and Jammu & Kashmir, located between 0.45 km and 455.72 km apart from each other were evaluated for RAPD polymorphism. Sixteen random primers generated 92 bands overall, 77 of which were polymorphic. Shannon’s index of genetic diversity within populations (H o) ranged between 0.305 and 0.421; the average within-population diversity (H pop) was 0.389; and the total species diversity (H sp) was 0.478. The population from Mohand (representing the type locality) had the fewest plants, at 18, and was genetically the most depauperate. Among the other populations, ranging in size between 52 and 1,022 individuals, no relation between population size and genetic diversity was evident. It is suggested that these six populations represent relics of a larger, extended population, in which the presence of perennating rootstocks has helped preserve historic patterns of genetic diversity. AMOVA revealed that 83.01% of the variation exists within populations, which was consistent with earlier studies on the reproductive biology of E. superba, which indicated this species is predominantly allogamous. FST distances between all populations were significant, indicating geographic differentiation despite some of them being closely separated. Habitat restoration and protection from indiscriminate harvesting are proposed as primary strategies for conserving E. superba. Rejuvenation of the Mohand population through intrapopulation crossing between plants bearing diverse molecular phenotypes is also suggested.
机译：Eremostachys superba Royle前Benth。自19世纪末在喜马拉雅山西北部发现以来，（禾本科）种群数量急剧减少。来自印度北方邦和查mu与克什米尔邦六个种群的一百七十二株植物位于彼此之间0.45 km至455.72 km之间，进行了RAPD多态性评估。 16条随机引物总共产生92条带，其中77条是多态性的。香农群体内的遗传多样性指数（H o ）介于0.305和0.421之间；平均种群内多样性（H pop ）为0.389；总物种多样性（H sp ）为0.478。来自莫汉德（Mohand）的种群（代表典型地区）的植物最少，为18种，并且在遗传上是最贫穷的。在其他种群之间，其大小介于52至1,022个个体之间，种群大小与遗传多样性之间没有明显联系。建议这六个种群代表更大的扩展种群的遗物，其中多年生砧木的存在有助于保存遗传多样性的历史模式。 AMOVA揭示了种群中83.01％的变异存在，这与早期对E. superba生殖生物学的研究相一致，这表明该物种主要是同化的。所有人群之间的FST距离都很重要，尽管他们中的某些人紧密分开，但表明了地理差异。栖息地的恢复和滥砍滥伐的保护被提议为保护超级大肠杆菌的主要策略。还建议通过携带不同分子表型的植物之间的种群内杂交来恢复Mohand种群的活力。

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