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首页> 外文期刊>Journal of genetics >REML estimates of genetic parameters of sexual dimorphism for wing and thorax length in Drosophila melanogaster
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REML estimates of genetic parameters of sexual dimorphism for wing and thorax length in Drosophila melanogaster

机译：REML估计果蝇翼和胸部长度的性二态性的遗传参数

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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.
机译：限制性最大可能性被用来估计果蝇等雌系的雄性和雌性翼和胸部长度的遗传参数，并将结果与​​经典方差分析所获得的估计值进行比较。由于等女性系中的父母是未知的，因此总共模拟了500个父母谱系并计算了均值估计。与同等雌性研究不同，在同等雌性研究中，动物都被视为同胞，因此遗传力被高估了。因此，男性和女性机翼长度以及男性和女性胸部长度的遗传力分别估计为0.33、0.38、0.30和0.33，而使用方差分析获得的相应估计值分别为0.46、0.54、0.35和0.38。男性和女性性状的机翼和胸部长度的遗传相关性分别为0.85和0.62。性二态性和雌雄性状的比例是中等遗传的（机翼长度为0.30和0.23，胸部长度为0.38和0.23）。两者与女性性状均呈中度和正相关，而与男性性状均呈弱和负相关。这种遗传力证实，性二态性可能是果蝇中快速发展的性状。

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