The genetic contribution to sex determination and number of sex chromosomes vary among populations of common frogs (Rana temporaria).

ABSTRACT: The patterns of sex determination and sex differentiation have been shown to differ among geographic populations of common frogs. Notably, the association between phenotypic sex and linkage group 2 (LG2) has been found to be perfect in a northern Swedish population, but weak and variable among families in a southern one. By analyzing these populations with markers from other linkage groups, we bring two new insights: (1) the variance in phenotypic sex not accounted for by LG2 in the southern population could not be assigned to genetic factors on other linkage groups, suggesting an epigenetic component to sex determination; (2) a second linkage group (LG7) was found to co-segregate with sex and LG2 in the northern population. Given the very short timeframe since post-glacial colonization (i

SUBMITTER: Rodrigues N 

PROVIDER: S-EPMC4901354 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature