Quantitative genetic analysis of among-population variation in sperm and female sperm-storage organ length in Drosophila mojavensis

Gary T. Miller, William T. Starmer, Scott Pitnick

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

In Drosophila, sperm length and the length of the females' primary sperm-storage organ have rapidly coevolved through post-copulatory sexual selection. This pattern is evident even among geographic populations of Drosophila mojavensis. To understand better these traits of potential importance for speciation, we performed quantitative genetic analysis of both seminal receptacle length and sperm length in two divergent populations. Parental strains, F1, F1 reciprocal (F1r), F2, F2r, backcross and backcross reciprocal generations were used in a line-cross (generation means) analysis. Seminal receptacle length is largely an autosomal additive trait, whereas additivity, dominance and epistasis all contributed to the means of sperm length. Either an X-chromosome or a Y-chromosome effect was necessary for models of sperm length to be significant. However, the overall contributions from the X and Y chromosomes to sperm length was small.

Original languageEnglish (US)
Pages (from-to)213-220
Number of pages8
JournalGenetical Research
Volume81
Issue number3
DOIs
StatePublished - Jun 1 2003

ASJC Scopus subject areas

  • Genetics

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