Factors influencing levels of genetic diversity in woody plant species
Factors influencing levels of genetic diversity in woody plant species
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DOI：
10.1007/bf00120641
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发表时间：
1992-01-01
期刊：
影响因子：
2.2
通讯作者：
Sherman-Broyles, Susan L.
中科院分区：
文献类型：
--
作者：
Hamrick, J. L.;Godt, Mary Jo W.;Sherman-Broyles, Susan L.
本文综述了植物等位酶的研究进展，目的是：（1）比较长寿木本植物与其他生活型植物的遗传多样性;（2）探讨木本植物遗传多样性的水平和分布是否与生活史和生态学特征有关。来自322个木本分类群的数据被用来衡量物种内的遗传多样性，物种种群内和种群间。木本植物在种内和居群内比其他生活型的物种保持更多的变异，但居群间的变异较小。具有较大地理分布范围、异交繁殖系统、风或动物摄食种子传播的木本物种在物种和种群内具有更多的遗传多样性，但种群间的变异比具有其他性状组合的木本物种少。虽然生活史和生态性状解释了显着比例（34%）的物种间的遗传参数测量的变化，种间变异的很大一部分是无法解释的。每个物种的特定进化历史必须在决定遗传多样性的水平和分布方面发挥重要作用。
The plant allozyme literature was reviewed to: (1) compare genetic diversity in long-lived woody species with species representing other life forms, and (2) to investigate whether the levels and distribution of genetic diversity in woody species are related to life history and ecological characteristics. Data from 322 woody taxa were used to measure genetic diversity within species, and within and among populations of species. Woody species maintain more variation within species and within populations than species with other life forms but have less variation among populations. Woody species with large geographic ranges, outcrossing breeding systems, and wind or animal-ingested seed dispersal have more genetic diversity within species and populations but less variation among populations than woody species with other combinations of traits. Although life history and ecological traits explain a significant proportion (34%) of the variation among species for the genetic parameters measured, a large proportion of the interspecific variation is unexplained. The specific evolutionary history of each species must play an important role in determining the level and distribution of genetic diversity.