MOLECULAR EVIDENCE FOR THE ORIGIN OF BIRDS

被引：247
|
作者：
HEDGES, SB [1 ]
机构：
[1] PENN STATE UNIV,INST MOLEC EVOLUT GENET,UNIV PK,PA 16802
来源：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 1994年 / 91卷 / 07期
关键词：
EVOLUTION; TETRAPOD; AMNIOTE; PHYLOGENY; SYSTEMATICS;
D O I：
10.1073/pnas.91.7.2621
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The major groups of amniote vertebrates appeared during a relatively short time span at the end of the Paleozoic Era, a fact that has caused difficulty in estimating their relationships. The fossil record suggests that crocodilians are the closest living relatives of birds. However, morphological characters and molecular sequence data from living amniotes have repeatedly challenged this hypothesis by indicating a bird-mammal relationship. DNA sequences from four slow-evolving genes (mitochondrial 12S and 16S rRNA, tRNA(Val), and nuclear alpha-enolase) now provide strong statistical support for a bird-crocodilian relationship.
引用
收藏
页码：2621 / 2624
页数：4
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