Genetic diversity and structure of Ochlandra travancorica populations from Kerala part of the Western Ghats

Q4 Agricultural and Biological Sciences

Journal of Bamboo and Rattan Pub Date : 2022-08-30 DOI:10.55899/09734449.22/21.1b/326

Sijimol K, Sreekumar Vb, Suma Arun Dev

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Abstract

Ochlandra travancorica is one of the eco- nomically important endemic reed bamboos of the Western Ghats. They are indiscriminately harvested for commercial usage in paper, pulp, and traditional cottage industries. This has drastically affected its viable populations in the Western Ghats. SSR markers were employed for characterizing the selected natural population to assess genetic diversity and infer genetic structure in their natural distribution range. The marker analysis revealed existence of high genetic diversity in sampled populations of O. travancorica (He=0.834, I=2.092). Analysis of molecular variance (AMOVA) revealed that a large proportion of genetic variation (84 %) is confined within the populations and only 16 percent was observed between populations. The pattern of genetic admixture generated in STRUCTURE analysis revealed high level of substructuring of populations. This might be due to close proximities of populations and high amount of gene flow (Nm=1.456) among them. Genetically diverse populations as indicated by number of, private alleles, gene diversity, heterozygosity and polymorphic content in different geographical areas indicate the need for ex situ conservation and genetic improvement programmes. Periyar and Malayatoor populations with significant genetic admixtures can also be recommended for resource conservation of reed bamboo species.

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来自西高止山脉喀拉拉邦部分地区的山药种群的遗传多样性和结构

芦苇竹是西高止山脉特有的重要经济竹种之一。它们被不加选择地收获，用于造纸、纸浆和传统家庭手工业的商业用途。这极大地影响了它在西高止山脉的生存人口。利用SSR标记对所选自然群体进行鉴定，评估其自然分布范围内的遗传多样性和遗传结构。标记分析表明，各样本群体存在较高的遗传多样性(He=0.834, I=2.092)。分子变异分析(AMOVA)表明，大部分遗传变异(84%)局限于群体内，只有16%存在于群体间。结构分析产生的遗传混合模式显示群体的亚结构水平较高。这可能是由于种群的接近性和它们之间的基因流量大(Nm=1.456)。不同地理区域的遗传多样性种群的数量、私人等位基因、基因多样性、杂合性和多态含量表明需要进行移地保护和遗传改良方案。具有显著遗传杂合的Periyar和Malayatoor群体也可作为芦苇竹资源保护的推荐群体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Bamboo and Rattan Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The Journal of Bamboo and Rattan is a peer-reviewed scientific journal and provides a forum for scientific articles and reviews on all aspects of fast growing, multi-purpose pliable species. The scope of the journal encompasses income security, craft industry, small to medium size enterprises, industrial fibre and fuel. Articles related to natural distribution and conservation of species, genetics and biotechnology, harvesting and production systems, and environmental applications are also included, as well as papers on marketing and policy restraints in relation to bamboo, rattan and related species.