MITOCHONDRIAL-DNA ANALYSIS OF INTROGRESSION BETWEEN ADJACENT TAXA OF ROCK-WALLABIES, PETROGALE SPECIES (MARSUPIALIA, MACROPODIDAE)
MITOCHONDRIAL-DNA ANALYSIS OF INTROGRESSION BETWEEN ADJACENT TAXA OF ROCK-WALLABIES, PETROGALE SPECIES (MARSUPIALIA, MACROPODIDAE)
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DOI：
10.1017/s0016672300031074
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发表时间：
1993-02-01
影响因子：
1.5
通讯作者：
CLOSE, RL
中科院分区：
文献类型：
--
作者：
BEE, CA;CLOSE, RL
简单，廉价的技术被用来分析9个染色体不同的种群的线粒体DNA。其中八个种群沿着澳大利亚东部的大分水岭依次出现;其中六个被描述为物种。在所描述的四个物种的纬度范围内发现了诊断mtDNA变体。第五种变体跨越了两个描述的物种和三个额外的分类群的范围，这些分类群被指定为染色体小种。这五个mtDNA变体和其他具有局部分布的变体被用来评估分类群之间的相互作用。结果表明，在长毛披碱草/赫氏披碱草和无饰披碱草/同化披碱草的染色体边界上存在有限的基因渗入;在赫氏披碱草和无饰披碱草的染色体分布中发现了非典型的mtDNA变体。在分布区被Fitzroy河隔开的两个种间没有检测到渐渗现象。也没有证据表明最近在P. assimilis、P. herberti和P. purpureicollis之间有过接触，尽管身份不明的Petrogale后来占领了部分干预区域。这些数据，考虑到从以前的研究中获得的信息，染色体，等位酶和寄生虫，作出了决定，考虑所有东部代表的lateralis-penicillata组的Petrogale是具体不同的。
Simple, inexpensive techniques were used to analyse the mtDNA of nine chromosomally distinct populations of Petrogale. Eight of these populations occur in sequence along the Great Dividing Range of eastern Australia; six have been described as species. Diagnostic mtDNA morphs were found throughout the latitudinal ranges of four of the described species. A fifth morph spanned the ranges of two described species and three additional taxa which have been designated chromosome races. These five mtDNA morphs, and others with local distributions, were used to assess interactions between the taxa. Limited introgression was indicated across the chromosomal boundaries of P. penicillata/P. herberti and P. inornata/P. assimilis; atypical mtDNA morphs were found within the P. herberti and P. inornata chromosomal distributions. No introgression was detected between P. herberti and P. inornata, whose distributions are separated by the Fitzroy River. Nor was there evidence of recent contact between P. assimilis, P. herberti and P. purpureicollis, despite the late occupancy of parts of the intervening area by unidentified Petrogale. These data, considered in the light of information obtained from previous studies on chromosomes, allozymes and parasites, have contributed to the decision to consider all the eastern representatives of the lateralis-penicillata group of Petrogale as being specifically distinct from each other.