Genetics of incipient speciation in Drosophila mojavensis. I. Male courtship song, mating success, and genotype X environment interactions

Etges, William J., de Oliveira, Cassia Cardoso, Gragg, Erin, Ortiz-Barrientos, Daniel, Noor, Mohamed A. F. and Ritchie, Michael G. (2007) Genetics of incipient speciation in Drosophila mojavensis. I. Male courtship song, mating success, and genotype X environment interactions. Evolution, 61 5: 1106-1119. doi:10.1111/j.1558-5646.2007.00104.x


Author Etges, William J.
de Oliveira, Cassia Cardoso
Gragg, Erin
Ortiz-Barrientos, Daniel
Noor, Mohamed A. F.
Ritchie, Michael G.
Title Genetics of incipient speciation in Drosophila mojavensis. I. Male courtship song, mating success, and genotype X environment interactions
Formatted title
Genetics of incipient speciation in Drosophila mojavensis. I. Male courtship song, mating success, and genotype X environment interactions
Journal name Evolution   Check publisher's open access policy
ISSN 0014-3820
1558-5646
Publication date 2007-05
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1111/j.1558-5646.2007.00104.x
Volume 61
Issue 5
Start page 1106
End page 1119
Total pages 14
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Subject 0603 Evolutionary Biology
Formatted abstract
Few studies have examined genotype by environment (GxE) effects on premating reproductive isolation and associated behaviors, even though such effects may be common when speciation is driven by adaptation to different environments. In this study, mating success and courtship song differences among diverging populations of Drosophila mojavensis were investigated in a two-environment quantitative trait locus (QTL) analysis. Baja California and mainland Mexico populations of D. mojavensis feed and breed on different host cacti, so these host plants were used to culture F2 males to examine host-specific QTL effects and GxE interactions influencing mating success and courtship songs. Linear selection gradient analysis showed that mainland females mated with males that produced songs with significantly shorter L(long)-IPIs, burst durations, and interburst intervals. Twenty-one microsatellite loci distributed across all five major chromosomes were used to localize effects of mating success, time to copulation, and courtship song components. Male courtship success was influenced by a single detected QTL, the main effect of cactus, and four GxE interactions, whereas time to copulation was influenced by three different QTLs on the fourth chromosome. Multiple-locus restricted maximum likelihood (REML) analysis of courtship song revealed consistent effects linked with the same fourth chromosome markers that influenced time to copulation, a number of GxE interactions, and few possible cases of epistasis. GxE interactions for mate choice and song can maintain genetic variation in populations, but alter outcomes of sexual selection and isolation, so signal evolution and reproductive isolation may be slowed in diverging populations. Understanding the genetics of incipient speciation in D. mojavensis clearly depends on cactus-specific expression of traits associated with courtship behavior and sexual isolation.
Keyword Evolution
Cactus
Courtship Song
Drosophila mojavensis
GxE interaction
QTL
Sexual isolation
Speciation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collections: Excellence in Research Australia (ERA) - Collection
School of Biological Sciences Publications
Ecology Centre Publications
 
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