Phylogeographic patterns and conservation units of a vulnerable species, Cabot's tragopan (Tragopan caboti), endemic to southeast China
Phylogeographic patterns and conservation units of a vulnerable species, Cabot's tragopan (Tragopan caboti), endemic to southeast China
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中国东南部特有的易危物种卡波角雉 (Tragopan caboti) 的系统发育地理格局和保护单位
DOI：
10.1007/s10592-010-0108-6
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发表时间：
2010-12-01
影响因子：
2.2
通讯作者：
Zheng, Guangmei
中科院分区：
文献类型：
--
作者：
Dong, Lu;Zhang, Jie;Zheng, Guangmei
卡氏角雉（Tragopan caboti）是中国东南部特有的一种野鸡，由于种群规模持续下降和栖息地破碎化加剧，受到国家和全球立法的保护。我们调查了该物种的地理分布格局，并研究了进化单位之间的一致性，并假设该物种的亚种分类。本研究选取了分布范围较广的6个种群作为研究对象，采用两个线粒体DNA片段（控制区，CR和细胞色素B，cyt B）进行分析。结果表明，该群体具有较高的遗传多样性（CR和cyt B的h值分别为0.97和0.78），群体间分化显著。系统发育分析表明，该亚种存在两个单系分支，分别命名为“西群”和“东群”，这与该亚种的区域分布不一致。两个类群的分化时间约为5.54 × 10 ~（5）~ 8.7 × 10 ~（5）年，两个类群的扩张时间相近（约为3 × 10 ~（5）年），表明冰川作用对种内分化的影响。根据遗传分析的结果，结合地理隔离和独特的种群历史，我们的研究结果表明，两个管理单位（MU）应被定义在T。caboti for conservation.
Cabot's tragopan (Tragopan caboti) is a pheasant endemic to southeast China and is protected under both national and global legislation due to ongoing decline in population size and increased habitat fragmentation. We investigated the phylogeographic patterns and examined the consistency between evolutionary units and assumed subspecies taxonomy in this species. Six populations across the whole species presenting a wide distribution range were sampled and two mitochondrial DNA segments (control region, CR and cytochrome b, cyt b) were used in this study. The results demonstrated a high level of genetic diversity (h = 0.97 in CR and 0.78 in cyt b) and significant differentiation among populations. Phylogenetic analyses strongly indicated two reciprocally monophyletic clades named the "West group" and "East group" that were not consistent with the present subspecies regional distribution. The divergence time between the two groups was estimated to be around 5.54 x 10(5)-8.7 x 10(5) years ago, and the expansion times of the two groups were close (about 3 x 10(5) years ago), indicating the effect of glaciation in intraspecific differentiation. Based on the results of genetic analyses combined with geographic isolation and distinct population history, our findings suggest that two management units (MUs) should be defined in T. caboti for conservation.