Isozyme variation and its environmental correlates in Elymus glaucus from the California Floristic Province
Isozyme variation and its environmental correlates in Elymus glaucus from the California Floristic Province
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DOI：
10.1139/b00-150
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发表时间：
2001-02
期刊：
影响因子：
1.1
通讯作者：
B. L. Wilson;J. Kitzmiller;Wayne Rolle;V. Hipkins
中科院分区：
文献类型：
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作者：
B. L. Wilson;J. Kitzmiller;Wayne Rolle;V. Hipkins
利用同工酶对来自俄勒冈州西南部、旧金山湾区和加州内华达山脉中部的133个群体的自交异源四倍体草羊茅（Elymus glaucus Buckley）进行遗传变异分析。青花羊草纯合性高（98.5%），但变异程度也高；77%的位点为多态性位点，平均每个位点的等位基因数为2.96个。种群高度分化，种群间有40%的变异。种群间的地理和遗传距离不相关，除了在5公里内收集的种群一般比平均水平更相似。种群间的遗传距离不能通过地理距离、地理位置、叶片短柔毛、蛇形底物或生境湿度来预测。然而，确实出现了两个与海拔升高有关的基因簇。白羊草的分类地位。基于叶片短柔毛的jepsonii (Burtt Davy) Gould不被支持。
Genetic variation in the self-fertile, allotetraploid grass Elymus glaucus Buckley was assessed using isozymes in 133 populations from southwestern Oregon and from the San Francisco Bay area and central Sierra Nevada moun- tains in California. Elymus glaucus was highly (98.5%) homozygous but also highly variable; 77% of loci were poly- morphic, and the mean number of alleles per locus was 2.96. Populations were highly differentiated, with 40% of variation among populations. Geographic and genetic distances among populations were not correlated, except that pop- ulations collected within 5 km were generally more similar than average. Genetic distance among populations could not be predicted from geographic distance, geographic location, foliage pubescence, serpentine substrate, or habitat mois - ture. However, two genetic clusters, associated with elevation, did emerge. The taxonomic status of Elymus glaucus ssp. jepsonii (Burtt Davy) Gould, based on leaf pubescence, was not supported.