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首页> 外文期刊>Biochemical Genetics >Genetic variation in natural populations of Stipa tenacissima from Algeria.
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Genetic variation in natural populations of Stipa tenacissima from Algeria.

机译：阿尔及利亚的针叶天牛天然种群的遗传变异。

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摘要

Intermicrosatellite PCR [inter-simple sequence repeat (ISSR)-PCR] markers and cytogenetics criteria were used to assess the level of genetic diversity and genetic structure in 17 populations of Stipa tenacissima (Gramineae) from Algeria. All populations sampled in the steppe area were diploids (2n = 2x = 24), and those sampled in the dry area were hexaploids (2n = 6x = 72). The dendrogram based on ISSR-PCR showed homogeneity within populations and large variability among populations. All individuals of the same population were gathered and formed groups clearly separated in all populations. These groups were separated into two clusters related to biotope, one from the steppe area and the other from the dry area. AMOVA indicated low genetic diversity among populations (30% of variation) and high within populations (70%). This variation pattern would constitute an adaptive strategy to grow in various ecological conditions.
机译：使用微卫星间PCR [简单序列间重复（ISSR）-PCR]标记和细胞遗传学标准，评估阿尔及利亚17个针茅针茅（Gramineae）种群的遗传多样性和遗传结构。在草原地区采样的所有种群均为二倍体（2n = 2x = 24），在干燥地区采样的所有种群均为六倍体（2n = 6x = 72）。基于ISSR-PCR的树状图显示出群体内的均一性和群体间的大差异。收集了同一人口的所有个人，并在所有人口中清楚地分成了不同的组。这些组被分为与生物群落相关的两个集群，一个来自草原地区，另一个来自干旱地区。 AMOVA表明种群间遗传多样性低（变异的30％），种群内遗传多样性高（70％）。这种变化模式将构成在各种生态条件下生长的适应策略。

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