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首页> 外文期刊>Biochemical Genetics >No Correlation Between Heterozygosity and Vegetative Fitness in the Narrow Endemic and Critically Endangered Clematis acerifolia (Ranunculaceae)
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No Correlation Between Heterozygosity and Vegetative Fitness in the Narrow Endemic and Critically Endangered Clematis acerifolia (Ranunculaceae)

机译：窄地方病和极度濒危的铁线莲（铁线莲科）杂合度与营养适应性之间没有相关性

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摘要

The relationship between heretozygosity and vegetative fitness was explored in the narrow endemic and threatened Clematis acerifolia (Ranunculaceae), both at individual and population levels. The relationships between fitness, habitat factors, and population size were also analyzed. Allozyme electrophoresis was used to quantify the levels of heterozygosity of nearly 200 surveyed individuals belonging to the nine extant populations of this species. Six parameters of vegetative fitness were measured: plant height, shrub diameter, length of the largest leaf, width of the largest leaf, mean number of leaves/stem, and total number of stems. The percentage of tree cover (light availability) was measured as an indicator of habitat quality. A principal component analysis reduced the original fitness variables to two uncorrelated principal components. None of these correlated significantly with both heterozygosity and population size, in contrast to the expected result. Nevertheless, one of the principal components showed a positive relationship with light availability, which may indicate that habitat quality may have significant effects on the performance of this species. Thus, to ensure the viability of this endangered species, maintenance of adequate habitat quality (by avoiding further fragmentation) may be more important than maximizing genetic diversity within populations.
机译：在个体和种群水平上，在狭窄的地方性和濒临灭绝的铁线莲科（毛ema科）中探索了杂合度与营养适应性之间的关系。还分析了适应度，栖息地因素和人口规模之间的关系。使用同工酶电泳来量化属于该物种九个现存种群的近200名被调查个体的杂合水平。测量了六个适合植物生长的参数：植物高度，灌木直径，最大叶的长度，最大叶的宽度，平均叶数/茎数和茎总数。测量树木覆盖率（光利用率）作为栖息地质量的指标。主成分分析将原始适应性变量简化为两个不相关的主成分。与预期结果相反，这些均与杂合性和群体大小均无显着相关。但是，其中一个主要成分与光的利用率呈正相关，这可能表明栖息地质量可能对该物种的性能产生重大影响。因此，为了确保这种濒临灭绝物种的生存能力，保持适当的栖息地质量（避免进一步分裂）可能比最大化种群内的遗传多样性更为重要。

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