REML estimates of genetic parameters of sexual dimorphism for wing and thorax length in<Emphasis Type="Italic">Drosophila melanogaster</Emphasis> |
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Authors: | Email author" target="_blank">Sandrine?Mignon-GrasteauEmail author Jean?David Patricia?Gibert Hélène?Legout Georges?Pétavy Brigitte?Moreteau Catherine?Beaumont |
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Institution: | (1) Station de Recherches Avicoles, Institut National de la Recherche Agronomique, 37380 Nouzilly, France;(2) Laboratoire Populations, Génétique et Evolution, CNRS, 91198 Gif-sur-Yvette Cedex, France;(3) Laboratoire Biométrie, Biologie Evolutive, Université de Lyon I, CNRS, 69622 Villeurbanne Cedex, France |
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Abstract: | Restricted maximum likelihood was used to estimate genetic parameters of male and female wing and thorax length in isofemale
lines ofDrosophila melanogaster, and results compared to estimates obtained earlier with the classical analysis of variance approach. As parents within an
isofemale line were unknown, a total of 500 parental pedigrees were simulated and mean estimates computed. Full and half sibs
were distinguished, in contrast to usual isofemale studies in which animals were all treated as half sibs and hence heritability
was overestimated. Heritability was thus estimated at 0.33, 0.38, 0.30 and 0.33 for male and female wing length and male and
female thorax length, respectively, whereas corresponding estimates obtained using analysis of variance were 0.46, 0.54, 0.35
and 0.38. Genetic correlations between male and female traits were 0.85 and 0.62 for wing and thorax length, respectively.
Sexual dimorphism and the ratio of female to male traits were moderately heritable (0.30 and 0.23 for wing length, 0.38 and
0.23 for thorax length). Both were moderately and positively correlated with female traits, and weakly and negatively correlated
with male traits. Such heritabilities confirmed that sexual dimorphism might be a fast evolving trait inDrosophila.
An erratum to this article is available at . |
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Keywords: | sexual dimorphism genetic parameters body size restricted maximum likelihood (REML) Drosophila |
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