Genomics of sex allocation in the parasitoid wasp Nasonia vitripennis

BMC Genomics
Bart A PannebakkerD M Shuker

Abstract

Whilst adaptive facultative sex allocation has been widely studied at the phenotypic level across a broad range of organisms, we still know remarkably little about its genetic architecture. Here, we explore the genome-wide basis of sex ratio variation in the parasitoid wasp Nasonia vitripennis, perhaps the best studied organism in terms of sex allocation, and well known for its response to local mate competition. We performed a genome-wide association study (GWAS) for single foundress sex ratios using iso-female lines derived from the recently developed outbred N. vitripennis laboratory strain HVRx. The iso-female lines capture a sample of the genetic variation in HVRx and we present them as the first iteration of the Nasonia vitripennis Genome Reference Panel (NVGRP 1.0). This panel provides an assessment of the standing genetic variation for sex ratio in the study population. Using the NVGRP, we discovered a cluster of 18 linked SNPs, encompassing 9 annotated loci associated with sex ratio variation. Furthermore, we found evidence that sex ratio has a shared genetic basis with clutch size on three different chromosomes. Our approach provides a thorough description of the quantitative genetic basis of sex ratio variation in Na...Continue Reading

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Methods Mentioned

BETA
genotyping
PCR

Software Mentioned

SnpSift
samtools
lme4
samtools mpileup
Joint Genotyper for ( JGIL )
nlme
BWA
fastq
PoPoolation
SNPEff

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