Comparative cytogenetics of bats (Chiroptera): The prevalence of Robertsonian translocations limits the power of chromosomal characters in resolving interfamily phylogenetic relationships

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• 作者：Xiuguang Mao ; Wenhui Nie ; Jinhuan Wang ; Weiting Su ; Qing Feng ; Yingxiang Wang ; Gauthier Dobigny and Fengtang Yang
• 关键词：Chiroptera ; chromosomal rearrangement ; convergence ; Emballonuridae ; evolution ; karyology ; Megadermatidae ; Robertsonian
• 刊名：Chromosome Research
• 出版年：2008
• 出版时间：March, 2008
• 年：2008
• 卷：16
• 期：1
• 页码：155-170
• 全文大小：530.7 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Cell Biology
  Human Genetics
  Animal Genetics and Genomics
  Plant Genetics and Genomics
  
• 出版者：Springer Netherlands
• ISSN：1573-6849

文摘

Although the monophyly of Chiroptera is well supported by many independent studies, higher-level systematics, e.g. the monophyly of microbats, remains disputed by morphological and molecular studies. Chromosomal rearrangements, as one type of rare genomic changes, have become increasingly popular in phylogenetic studies as alternatives to molecular and other morphological characters. Here, the representatives of families Megadermatidae and Emballonuridae are studied by comparative chromosome painting for the first time. The results have been integrated into published comparative maps, providing an opportunity to assess genome-wide chromosomal homologies between the representatives of eight bat families. Our results further substantiate the wide occurrence of Robertsonian translocations in bats, with the possible involvement of whole-arm reciprocal translocations (WARTs). In order to search for valid cytogenetic signature(s) for each family and superfamily, evolutionary chromosomal rearrangements identified by chromosomal painting and/or banding comparison are subjected to two independent analyses: (1) a cladistic analysis using parsimony and (2) the mapping of these chromosomal changes onto the molecularly defined phylogenetic tree available from the literature. Both analyses clearly indicate the prevalence of homoplasic events that reduce the reliability of chromosomal characters for resolving interfamily relationships in bats.