The globe transcriptome analysis reveals hybrid effects and regulatory divergence between (Acanthopagrus schlegelii ♂× Pagrus major ♀) hybrid F1 and parents

Abstract

Background: Hybridization in two related homoploid species can mix the genotypes which have the potential for good environmental adaptation conditions or rapid growth condition. Since hybridization technique has been used in other animals to produce more rapidly growing individuals, it may be useful in commercial fish culture. The nutritional composition and rapid growth rate of P. major, A. schlegelii and hybrid F1 had been researched. However, gene expressions of these fish are less well studied. de novo assembly RNA-Seq is a better approach to understanding transcriptomes of animals and can offer much data with better coverage and sufficient sequence depth for transcriptomes. Results: In order to facilitate molecular research in parents and hybrids F1, we characterized the whole body transcriptome for identifcation of transcripts involved in growth, metabolism and immune since several attributes were coming from different samples (Acanthopagrus schlegelii, Pagrus major and hybrid F1 Acanthopagrus schlegelii ♂× Pagrus major ♀). We analyzed the transcriptome of As, Pm and hybrid F1 AP using Illumina high throughput sequencing platform. Our results suggested that physiological index of organism development we observed is consistent to the gene express in transcriptome. We have also compared the expression levels of transcripts in parents and hybrids F1. The results showed that AP had a quickly growth and strong resistant than parents Pm and As. Conclusion: This is the first research on transcriptome of As, Pm and hybrid F1 at one month age. And it will provide an important basic molecular data for studying molecular mechanisms involved in different sample.