Identification of General Patterns of Sex-Biased Expression in , a Genus with Environmental Sex Determination

Overview

Journal G3 (Bethesda)

Publisher Oxford University Press

Specialties Genetics
Molecular Biology

Date 2018 Mar 15

PMID 29535148

Citations 8

Authors

Cecile Molinier

Celine M O Reisser

Peter Fields

Adeline Segard

Yan Galimov

Christoph R Haag

Affiliations

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Abstract

reproduce by cyclic-parthenogenesis, where phases of asexual reproduction are intermitted by sexual production of diapause stages. This life cycle, together with environmental sex determination, allow the comparison of gene expression between genetically identical males and females. We investigated gene expression differences between males and females in four genotypes of and compared the results with published data on sex-biased gene expression in two other species, each representing one of the major phylogenetic clades within the genus. We found that 42% of all annotated genes showed sex-biased expression in This proportion is similar both to estimates from other species as well as from species with genetic sex determination, suggesting that sex-biased expression is not reduced under environmental sex determination. Among 7453 single copy, one-to-one orthologs in the three species, 707 consistently showed sex-biased expression and 675 were biased in the same direction in all three species. Hence these genes represent a core-set of genes with consistent sex-differential expression in the genus. A functional analysis identified that several of them are involved in known sex determination pathways. Moreover, 75% were overexpressed in females rather than males, a pattern that appears to be a general feature of sex-biased gene expression in .

Citing Articles

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Fields P, McTaggart S, Reisser C, Haag C, Palmer W, Little T Mol Biol Evol. 2022; 39(3).

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