Conservation genetics of the endangered endemic Hawaiian genus Brighamia (Campanulaceae)
Conservation genetics of the endangered endemic Hawaiian genus Brighamia (Campanulaceae)
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DOI：
10.2307/2446437
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发表时间：
1998-04-01
影响因子：
3
通讯作者：
Wood, KR
中科院分区：
文献类型：
--
作者：
Gemmill, CEC;Ranker, TA;Wood, KR
夏威夷特有的Brighamia属（Campanulaceae）包括两个联邦濒危物种，形态相似的物种。来自考艾岛和尼豪岛的B. insigni和来自莫洛卡岛的B. rockii。为了帮助设计这些分类群的保护管理方案，我们进行了同工酶分析，以评估种群和物种水平上的遗传多样性水平，包括7个自然种群内和1个迁地收集的白桦和白桦的遗传多样性水平。我们的样本（N = 80）代表了所有已知野外个体的41%。同工酶分析显示，其遗传变异水平与其他夏威夷开花植物类群相当，但与一般开花植物相比，其种群和物种水平的遗传变异水平较低。原位个体（N = 61）在遗传上具有自然种群的代表性，因此可以适当地作为种群扩增的种群。两种形态相似的Brighamia在遗传上具有高度的差异性。在夏威夷分类群中，Brighamia的形态和生态相似性与等位酶差异的结合是迄今为止所研究的唯一分类群。
The endemic Hawaiian genus Brighamia (Campanulaceae) comprises two federally endangered, morphologically similar species. B. insignis from Kaua'i and Ni'ihau and B. rockii from Moloka'i. To assist the design of conservation management programs far these taxa, isozyme analyses were performed to assess the levels of genetic diversity at the population and species levels, including comparisons within and among seven natural populations and one ex situ collection each of B. insignis and B. rockii. Our sampling (N = 80) represents similar to 41% of all known individuals in the wild. Isozyme analyses revealed levels of genetic variation comparable to those reported for other Hawaiian flowering plant taxa hut low levels of genetic variation at the population and species levels when compared to flowering plants in general. Es situ individuals (N = 61) were genetically representative of natural populations and hence may appropriately serve as stock for population augmentations. The two morphologically similar Brighamia species were highly distinct genetically. The combination of morphological and ecological similarity with allozymic dissimilarity observed in Brighamia is unique among the Hawaiian taxa studied to date.