Sex chromosomal dimorphisms narrated by X-chromosome translocation in a spiny frog (Quasipaa boulengeri)

doi:10.1186/s12983-018-0291-8

CORC > 成都生物研究所 > 中国科学院成都生物研究所 > 生物多样性与生态系统服务领域 > 中国科学院环境与应用微生物重点实验室

	Sex chromosomal dimorphisms narrated by X-chromosome translocation in a spiny frog (Quasipaa boulengeri)
	Yuan, Xiuyun 1,2; Xia, Yun 2; Zeng, Xiaomao 2
刊名	FRONTIERS IN ZOOLOGY
	2018
卷号	15 页码:47
关键词	Sex-linked locus Sex chromosomal dimorphisms Whole-chromosome painting X-chromosome translocation
ISSN号	1742-9994
DOI	10.1186/s12983-018-0291-8
产权排序	1
文献子类	Article
英文摘要	Background: In the general model of sex chromosome evolution for diploid dioecious organisms, the Y (or W) chromosome is derived, while the homogametic sex presumably represents the ancestral condition. However, in the frog species Quasipaa boulengeri, heteromorphisms caused by a translocation between chromosomes 1 and 6 are not related to sex, because the same heteromorphic chromosomes are found both in males and females at the cytological level. To confirm whether those heteromorphisms are unrelated to sex, a sex-linked locus was mapped at the chromosomal level and sequenced to identify any haplotype difference between sexes. Results: Chromosome 1 was assigned to the sex chromosome pair by mapping the sex-linked locus. X-chromosome translocation was demonstrated and confirmed by the karyotypes of the progeny. Translocation heteromorphisms were involved in normal and translocated X chromosomes in the rearranged populations. Based on phylogenetic inference using both male and female sex-linked haplotypes, recombination was suppressed not only between the Y and normal X chromosomes, respectively the Y and translocated X chromosomes, but also between the normal and translocated X chromosomes. Both males and females shared not only the same translocation heteromorphisms but also the X chromosomal dimorphisms in this frog. Conclusions: The reverse of the typical situation, in which the X is derived and the Y has remained unchanged, is known to be very rare. In the present study, X-chromosome translocation has been known to cause sex chromosomal dimorphisms. The X chromosome has gone processes of genetic differentiation and/or structural changes by chance, which may facilitate sex chromosome differentiation. These sex chromosomal dimorphisms presenting in both sexes may represent the early stages of sex chromosome differentiation and aid in understanding sex chromosome evolution.
学科主题	Animal Sciences
URL标识	查看原文
WOS关键词	Y-CHROMOSOMES ; EVOLUTION ; DIFFERENTIATION ; ORIGINS ; CHINA ; MODEL ; DNA
WOS研究方向	Zoology
语种	英语
出版者	BMC
WOS记录号	WOS:000451422600001
内容类型	期刊论文
源URL	[http://210.75.237.14/handle/351003/30625]
专题	食品安全与环境治理领域_中国科学院环境与应用微生物重点实验室
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Chengdu Inst Biol, 9 Sect 4,Renmin Nan Rd, Chengdu 610041, Sichuan, Peoples R China;
推荐引用方式 GB/T 7714	Yuan, Xiuyun,Xia, Yun,Zeng, Xiaomao. Sex chromosomal dimorphisms narrated by X-chromosome translocation in a spiny frog (Quasipaa boulengeri)[J]. FRONTIERS IN ZOOLOGY,2018,15:47.
APA	Yuan, Xiuyun,Xia, Yun,&Zeng, Xiaomao.(2018).Sex chromosomal dimorphisms narrated by X-chromosome translocation in a spiny frog (Quasipaa boulengeri).FRONTIERS IN ZOOLOGY,15,47.
MLA	Yuan, Xiuyun,et al."Sex chromosomal dimorphisms narrated by X-chromosome translocation in a spiny frog (Quasipaa boulengeri)".FRONTIERS IN ZOOLOGY 15(2018):47.