Transcriptome-based discovery of pathways and genes related to reproduction of the black tiger shrimp (Penaeus monodon)

Sep 14, 2017Marine genomics

Genes and biological pathways linked to reproduction in black tiger shrimp

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Abstract

Transcriptome analysis revealed 41,136 transcripts related to reproductive maturation in black tiger shrimp.

The study identified 20,192 contigs from the transcriptome analysis of black tiger shrimp ovaries and testes.
Novel transcripts related to gonadotropin-releasing hormone signaling and progesterone-mediated oocyte maturation were discovered.
Key receptors associated with the maturation process, including GnRH receptor, calcium channel L type alpha-1C, and epidermal growth factor receptor, were identified.
A putative novel vigillin encoding an estrogen-induced polysome-associated protein was found, previously unreported in penaeid shrimp.
These findings suggest potential similarities in reproductive regulatory mechanisms between black tiger shrimp and vertebrates.

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The black tiger shrimp (Penaeus monodon) is an aquatic animal with considerable economic importance. Poor reproductive maturation in captivity impedes sustainable aquaculture production of this species. This study aims to provide transcriptomic information on reproductive organs using 454 pyrosequencing technology. The transcriptome analysis of ovaries and testes revealed 41,136 transcripts with 20,192 contigs. We found novel sets of transcripts completing several important reproductive pathways such as gonadotropin-releasing hormone (GnRH) signaling and progesterone-mediated oocyte maturation. In addition, we found transcripts encoding for receptors crucial for initiation of the maturation process, such as GnRH receptor (GnRHR), voltage-dependent calcium channel L type alpha-1C (CACNA1C) and epidermal growth factor receptor (EGFR). Moreover, we found a putative novel vigillin encoding for an estrogen-induced polysome-associated protein, which has not been reported in penaeid shrimp. These results suggest that the regulatory mechanism of the pathways important to reproductive maturation might be similar to those in the vertebrate. The obtained data will consequently accelerate the study of reproductive biology of this important species to ensure a sustainable shrimp farming industry.

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Transcriptome-based discovery of pathways and genes related to reproduction of the black tiger shrimp (Penaeus monodon)

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