Comparative transcriptome analysis of diploid and triploid hybrid groupers (Epinephelus coioides♀ × E. lanceolatus♂) reveals the mechanism of abnormal gonadal development in triploid hybrids.

Abstract:

:In our previous studies, diploid and triploid hybrids have been detected from the hybridization of Epinephelus coioides♀ × E. lanceolatus♂. The triploid groupers have been found to be delayed in gonadal development, but the mechanism remains poorly understood. In this study, we examined the gonadal development, assayed the serum steroid hormone levels, and compared the BP (brain and pituitary) and G (gonad) transcriptomes of 18-month-old diploid and triploid hybrids. The results showed that levels of serum estradiol-17β and testosterone were significantly higher in triploid groupers. The RNA-seq data revealed that 1518 and 14,963 differentially expressed genes were identified in the BP and G transcriptome, respectively. Further analysis revealed that the expression levels of genes involved in the sexual differentiation pathway and sex steroid synthesis pathway are significantly higher in triploid hybrids. Our findings provided a comprehensive insight into a better understanding of the regulatory mechanisms of sterility in triploid hybrid fish.

journal_name

Genomics

journal_title

Genomics

authors

Xiao L,Wang D,Guo Y,Tang Z,Liu Q,Li S,Zhang Y,Lin H

doi

10.1016/j.ygeno.2018.11.010

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

251-259

issue

3

eissn

0888-7543

issn

1089-8646

pii

S0888-7543(18)30052-1

journal_volume

111

pub_type

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