兽类学报2011，Vol.31Issue(2)：117-124,8.
基于13个内含子的序列探讨鲸目的系统发育关系
Molecular phylogenetics of cetaceans: an insight from 13 nuclear intron sequences
摘要
Abstract
Sequences of 13 introns from 15 Cetartiodactyla species were determined to reveal the phylogeny of cetaceans.Our results support the monophyly of the traditionally accepted suborder Odontoceti ( toothed whales ), placing the dwarf sperm whale ( Kogia sima), a representative species of superfamily Physeteroidea, as sister to other toothed whales. Within the superfamily Delphinoidea, phylogenetic analyses identified a sister relationship between Delphinidae and Monodontidae + Phocoenidae. A close relationship among four genera ( Sousa, Tursiops, Stenella, and Delphinus) is strongly supported,which suggested the monophyly of the Sousa-Stenella-Tursiops-Delphinus complex. Neither the two Tursiops species ( T.truncates and T. aduncus ) nor the two Stenella species (S. coeruleoalba and S. attenuata ) examined in present study clustered together, which strongly supported the paraphyly of these two genera as suggested in previous studies. Furthermore,the present Bayesian inference with a lognormal relaxed molecular clock provided divergence time for each clade, which is consistent with previous estimations based on mitochondrial and nuclear DNA data. Based on this study, we proposed that nuclear introns hold great promise for resolving persistent problems in cetacean phylogeny.关键词
鲸目/内含子/系统发育分析/松散分子钟Key words
Cetacea/Intron/Phylogenetics/Relaxed molecular clock分类
生物科学引用本文复制引用
熊晔,周旭明,杨梅,张盼,杨云霞,杨光..基于13个内含子的序列探讨鲸目的系统发育关系[J].兽类学报,2011,31(2):117-124,8.基金项目
The present research was financially supported by the National Natural Science Foundation of China (NSFC) key project (30830016),the Program for New Century Excellent Talents in University ( NCET-07-0445 ),the Ministry of Education of China,and the major project of the Natural Science Foundation of the Jiangsu Higher Education Institutions of Jiangsu Province,China (07KJA 18016 ). （NSFC）
