REML estimates of genetic parameters of sexual dimorphism for wing and thorax length in Drosophila melanogaster

Journal of genetics

Sandrine Mignon-Grasteau1³  Georges Pétavy¹  Hélène Legout¹  Patricia Gibert²  Catherine Beaumont³  Brigitte Moreteau¹  Jean David¹ 

[1] CNRS, Laboratoire Populations, Génétique et Evolution, 91198 Gif-sur-Yvette Cedex, France$$;CNRS, Laboratoire Biométrie, Biologie Evolutive, Université de Lyon I, 69622 Villeurbanne Cedex, France$$;Station de Recherches Avicoles, Institut National de la Recherche Agronomique, 37380 Nouzilly, France$$

关键词: sexual dimorphism;    genetic parameters;    body size;    restricted maximum likelihood (REML);    Drosophila.;   

DOI  :  

学科分类：生物科学（综合）

来源: Indian Academy of Sciences

【 摘 要 】

Restricted maximum likelihood was used to estimate genetic parameters of male and female wing and thorax length in isofemale lines of Drosophila 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 in Drosophila.

【 授权许可】

Unknown