Evolution of heteromorphic sex chromosomes in the order Aulopiformes

被引:14
作者
Ota, K
Kobayashi, T
Ueno, K
Gojobori, T [1 ]
机构
[1] Natl Inst Genet, Ctr Informat Biol, Shizuoka 4118540, Japan
[2] Kinki Univ, Fac Agr, Dept Fisheries, Lab Aquat Biol, Nara 6318505, Japan
[3] Grad Univ Adv Studies, Kanagawa 2400193, Japan
关键词
gonochorism; hermaphroditism; phylogeny; teleost;
D O I
10.1016/S0378-1119(00)00460-1
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
The fish order Aulopiformes contains both synchronously hermaphroditic and gonochoristic species. From the cytogenetic viewpoint, few reports show that gonochoristic Aulopiformes have heteromorphic sex chromosomes. Because fish in this order give us a unique opportunity to elucidate the evolution of sex chromosomes, it is important to examine a phylogenetic relationship in Aulopiformes by both molecular evolutionary and cytogenetic methods. Thus, we conducted molecular phylogenetic and cytogenetic studies of six Aulopiform species. Our results suggested that hermaphroditic species were evolutionarily derived from gonochoristic species. It follows that the hermaphroditic species might have lost the heteromorphic sex chromosomes during evolution. Here, we suggest a possibility that heteromorphic sex chromosomes can disappear from the genome. even if they have appealed once in evolution. Taking into account Ohno's hypothesis that heteromorphic sex chromosomes might have emerged from autosomes. we propose the hypothesis that heteromorphic sex chromosomes may have undergone repeated events of appearance and disappearance during the course of fish evolution. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:25 / 30
页数:6
相关论文
共 12 条
[1]   Tissue preservation and total DNA extraction from fish stored at ambient temperature using buffers containing high concentration of urea [J].
Asahida, T ;
Kobayashi, T ;
Saitoh, K ;
Nakayama, I .
FISHERIES SCIENCE, 1996, 62 (05) :727-730
[2]   CYTOTAXONOMY OF CALIFORNIAN MYCTOPHOID FISHES [J].
CHEN, TR ;
EBELING, AW .
COPEIA, 1974, (04) :839-848
[3]  
HOWELL WM, 1979, COPEIA, P544
[5]  
Nelson J. S., 1994, FISHES WORLD
[6]  
NISHIKAWA S, 1978, J SHIMON U FISH, V27, P117
[7]  
Ohno S, 1974, ANIMAL CYTOGENETICS
[8]  
Ohno S., 1967, SEX CHROMOSOMES SEX
[9]   THE NEIGHBOR-JOINING METHOD - A NEW METHOD FOR RECONSTRUCTING PHYLOGENETIC TREES [J].
SAITOU, N ;
NEI, M .
MOLECULAR BIOLOGY AND EVOLUTION, 1987, 4 (04) :406-425
[10]  
Smith C.L., 1975, P295