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

ABSTRACT:

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 c

SUBMITTER: Yuan X 

PROVIDER: S-EPMC6260737 | biostudies-literature | 2018

REPOSITORIES: biostudies-literature