Phylogenetic position of turtles among amniotes: evidence from mitochondrial and nuclear genes

被引:79
作者
Cao, Y
Sorenson, MD
Kumazawa, Y
Mindell, DP
Hasegawa, M
机构
[1] Inst Stat Math, Minato Ku, Tokyo 1068569, Japan
[2] Boston Univ, Dept Biol, Boston, MA 02215 USA
[3] Nagoya Univ, Dept Earth & Planetary Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan
[4] Univ Michigan, Dept Biol, Ann Arbor, MI 48109 USA
[5] Univ Michigan, Museum Zool, Ann Arbor, MI 48109 USA
基金
日本学术振兴会; 美国国家科学基金会;
关键词
diapsid affinity of turtles; maximum likelihood; molecular phylogeny; reptile; total evaluation;
D O I
10.1016/S0378-1119(00)00425-X
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Maximum likelihood analysis, accounting for site-heterogeneity in evolutionary rate with the Gamma -distribution model. was carried out with amino acid sequences of 12 mitochondrial proteins and nucleotide sequences of mitochondrial 12S and 16S rRNAs from three turtles, one squamate, one crocodile, and eight birds. The analysis strongly suggests that turtles are closely related to archosaurs (birds + crocodilians), and it supports both Tree-2: (((birds, crocodilians), turtles). squamates) and Tree-3: ((birds, (crocodilians. turtles)), squamates). A more traditional Tree-1: (((birds, crocodilians), squamates), turtles) and a tree in which turtles are basal to other amniotes were rejected with high statistical significance. Tree-3 has recently been proposed by Hedges and Poling [Science 283 (1999) 998-1001] based mainly on nuclear genes. Therefore, we re-analyzed their data using the maximum likelihood method, and evaluated the total evidence of the analyses of mitochondrial and nuclear data sets. Tree-1 was again rejected strongly. The most likely hypothesis was Tree-3, though Tree-2 remained a plausible candidate. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:139 / 148
页数:10
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