Whole-genome resequencing infers genomic basis of giant phenotype in Siamese fighting fish(Betta splendens)  

作　　者：Le Wang Fei Sun May Lee Gen-Hua Yue 

机构地区：[1]Molecular Population Genetics&Breeding Group,Temasek Life Sciences Laboratory,Singapore 117604,Singapore [2]Department of Biological Sciences,National University of Singapore,Singapore 117543,Singapore

出　　处：《Zoological Research》2022年第1期78-80,共3页动物学研究（英文）

基　　金：supported by the Internal Funds of the Temasek Life Sciences Laboratory(5020)。

摘　　要：Understanding the genetic basis of phenotypes is of importance in evolutionary biology and for genetic improvement of economically valuable animals.The giant phenotype of the fighting fish,Betta splendens,provides a unique opportunity to explore the genetic architecture of overgrowth in body size.As such,we re-sequenced and analyzed the genomes of 54 fighting fish.Genome-wide FST and selective sweep analyses using 3582429 DNA variants revealed three genomic regions at chr1,chr9,and chr11 that were associated with the giant phenotype.With a total length of~3.5 Mb,these regions showed high divergence between the giant and non-giant bettas.In contrast,no signature of selection was detected in the wild-type fish.Transcriptome analysis of brain and muscle samples from giant and normal bettas identified 14 candidate genes that were likely responsible for the giant phenotype.Overall,our data provide novel insights into the genetic basis of body size variation.The genome sequences,transcriptome sequences,DNA sequence variants,and candidate genes for body size provide valuable resources for further biological and evolutionary studies,as well as for rapid improvement in growth-related traits.

关 键 词：FIGHTING Whole GIANT 

分 类 号：Q953[生物学—动物学]