Allard M W, Miyamoto M M, Jarecki L, Kraus F, Tennant M R
Department of Zoology, University of Florida, Gainesville 32611-2009.
Proc Natl Acad Sci U S A. 1992 May 1;89(9):3972-6. doi: 10.1073/pnas.89.9.3972.
Nine additional sequences from representatives of different tribes of the family Bovidae were combined with six published artiodactyl sequences to provide orthologous mtDNA for investigation of bovid phylogeny and evolution. Each species was represented by a homologous 2.7-kilobase-pair stretch of mtDNA for the complete 12S and 16S rRNA genes and three adjacent tRNA genes. These data, when compared to other results, provided evidence for a monophyletic Bovidae and for two clades within the family: one including the tribes Boselaphini, Bovini, and Tragelaphini and another for an Antilopini/Neotragini grouping. All other intrafamilial relationships were only weakly supported. These sequence comparisons suggest that most bovid tribes originated early in the Miocene with all extant lineages present by approximately 16-17 million years ago. Thus, bovid tribes provide an example of rapid cladogenesis, following the origin of families in the infraorder Pecora.
来自牛科不同族代表的另外9个序列与6个已发表的偶蹄目序列相结合,以提供直系同源线粒体DNA,用于研究牛科的系统发育和进化。每个物种都由一段2.7千碱基对的同源线粒体DNA片段代表,该片段包含完整的12S和16S rRNA基因以及三个相邻的tRNA基因。这些数据与其他结果相比,为单系牛科以及该科内的两个分支提供了证据:一个分支包括牛亚科、牛族和林羚族,另一个分支为羚羊族/新小羚族组合。所有其他科内关系的支持力度都很弱。这些序列比较表明,大多数牛科族起源于中新世早期,所有现存谱系在大约1600 - 1700万年前就已出现。因此,牛科族为例说明了在牛形亚目各科起源之后的快速分支进化。