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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic diversity and differentiation in Chinese sour cherry Prunus pseudocerasus Lindl., and its implications for conservation.
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Genetic diversity and differentiation in Chinese sour cherry Prunus pseudocerasus Lindl., and its implications for conservation.

机译：中国酸樱桃李的遗传多样性和分化及其对保护的意义。

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摘要

In this study, the genetic diversity and differentiation of 10 natural Prunus pseudocerasus Lindl. populations were investigated using inter-simple sequence repeat (ISSR) markers. Totally, 18 selected primers generated 150 loci, with an average of 8.33 bands per primer. The results showed that the percentage of polymorphic bands (PPB) was pretty low at the population level (PPB=1.13-32%), but relatively high at the species level (PPB=84%). Besides, a high level of genetic differentiation among populations was detected based on the gene differentiation coefficient (GST=0.7118) and the hierarchical analysis of molecular variance (AMOVA) ( Phi ST=64.53%, P<0.001), in line with the low inter-population gene flow (Nm=0.2025). Moreover, Mantel test revealed a significant correlation between genetic and geographic distances among the populations (r=0.5272, P<0.005). The high level of intraspecific genetic diversity was probably related with its life history traits, while its small population size and the resultant high levels of genetic drift and inbreeding might explain the low genetic diversity within populations. The relatively high inter-population genetic differentiation was largely attributed to its small population size, habitat fragmentation, the mode of pollen and seed dispersal, and geographic isolation. Based on the present study, conservation strategies were proposed to preserve this valuable natural germplasm resource.
机译：在这项研究中，10种天然 Prunus pseudocerasus Lindl的遗传多样性和分化。使用简单序列间重复（ISSR）标记调查了这些人群。总共有18个选定的引物产生了150个基因座，每个引物平均有8.33条带。结果表明，多态性带（ PPB ）的百分比在种群水平上很低（ PPB = 1.13-32％），但在物种水平上却相对较高（ PPB ） PPB = 84％）。此外，基于基因分化系数（ G ST = 0.7118）和分子变异等级分析（AMOVA）（Phi），在人群中发现了高水平的遗传分化。 ST = 64.53％， P <0.001），与低种群间基因流（ N m = 0.2025）。此外，Mantel检验揭示了种群之间遗传距离和地理距离之间的显着相关性（ r = 0.5272， P <0.005）。种内遗传多样性的高水平可能与其生活史特征有关，而种群数量少以及由此产生的高水平的遗传漂移和近交可能解释了种群内遗传多样性低。相对较高的种群间遗传分化主要归因于其较小的种群规模，栖息地破碎化，花粉和种子传播的方式以及地理隔离。基于目前的研究，提出了保存策略来保存这种宝贵的天然种质资源。

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