Genetic variation between and within two populations of Trifolium glomeratum (cluster clover) in Western Australia
Genetic variation between and within two populations of Trifolium glomeratum (cluster clover) in Western Australia
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DOI：
10.1071/a96158
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发表时间：
1997-01-01
影响因子：
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通讯作者：
Bennett, SJ
中科院分区：
文献类型：
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作者：
Bennett, SJ
利用采集自西澳大利亚州2个地点（南部的巴克山和小麦带的Kwelkan）的种子研究了三叶草（簇三叶草）种群间和种群内的遗传变异。在每个地点内的64个小区收集种子，并在珀斯的申顿公园的大学田间站种植材料。对17个形态性状进行评分，并对结果进行方差分析、主成分分析和聚类分析。研究中心内的变异比以前所显示的要大得多，并且存在相当数量的研究中心间变异。有人建议，网站内的变化是由于少量的杂合性，作为有限的远缘杂交的结果，存在于每个人口。这两个种群被证明彼此不同，其中巴克山的种群包含更多的地点内变异。有人建议，这是一个结果，气候压力的影响和减少量的变化被保持在Kwelkan人口。
Genetic variation between and within populations of Trifolium glomeratum (cluster clover) was studied using seed collected from 2 sites in Western Australia: Mount Barker in the south and Kwelkan in the wheatbelt. Seed was collected at 64 subplots within each site and the material was grown at the University Field Station at Shenton Park, Perth. Seventeen morphological characters were scored and the results were analysed using analysis of variance, principal components analysis, and cluster analysis. Within-site variation was much greater than had previously been shown, and a considerable amount of between-site variation was present. It is suggested that within-site variation is due to a small amount of heterozygosity, as a result of limited outbreeding, being present in each population. The 2 populations are shown to be distinct from each other, with the population from Mount Barker containing more within-site variation. It is suggested that this is a result of climatic stress influencing and reducing the amount of variation being maintained in the Kwelkan population.