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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Population genetic structure and conservation priorities of Oryza rufipogon Griff. populations in Kerala, India
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Population genetic structure and conservation priorities of Oryza rufipogon Griff. populations in Kerala, India

机译：稻瘟病菌的种群遗传结构和保护重点。印度喀拉拉邦的人口

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摘要

Oryza rufipogon Griff. is a valuable reservoir of useful traits for rice genetic improvement. We evaluated the genetic diversity of six populations of O. rufipogon from Kerala using random amplified polymorphic DNA (RAPD) markers. Various estimates revealed high genetic diversity in the populations. However, gene flow between the populations was low and 47% of the total genetic diversity was partitioned between populations, suggesting moderate differentiation between them. Clustering of all individuals from the same populations under distinct nodes supported the population differentiation. Considering its outbreeding behaviour, the low gene flow and moderate differentiation recorded in this study indicate that the recent habitat destruction and fragmentation have had an impact on the genetic characteristics of O. rufipogon populations in Kerala. The high genetic diversity observed in this study, contrary to expectations for fragmented populations, is presumably contributed by the recurring gene flow from cultivated rice grown in nearby fields. We recommend immediate conservation of a large number of populations of this species, including establishment of isolated conservatories away from rice fields to maintain the purity of the wild gene pool.
机译：Oryza rufipogon Griff。是水稻遗传改良有用性状的宝贵资源。我们使用随机扩增的多态性DNA（RAPD）标记评估了喀拉拉邦红景天六个种群的遗传多样性。各种估计表明，种群中遗传多样性很高。然而，种群之间的基因流很低，总遗传多样性的47％在种群之间分配，表明它们之间存在中等分化。来自同一种群的所有个体在不同节点下的聚类支持了种群分化。考虑到其近亲行为，本研究中记录的低基因流量和中等分化表明最近的栖息地破坏和破碎已对喀拉拉邦红景天种群的遗传特征产生了影响。在这项研究中观察到的高遗传多样性，与对零散种群的期望相反，大概是由于附近田间种植的水稻反复产生的基因流所致。我们建议立即保护该物种的大量种群，包括在稻田之外建立孤立的温室，以保持野生基因库的纯度。

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