Hoffmann A A
Department of Genetics and Human Variation, La Trobe University, Bundoora, Victoria, Australia.
Heredity (Edinb). 1999 Feb;82 ( Pt 2):158-62. doi: 10.1038/sj.hdy.6884640.
Empirical studies indicate that heritable variation for courtship behaviour in Drosophila is often not detectable, whereas mating speed has a low heritability. These patterns have been used to make inferences about the association between mating behaviours and fitness. However, mating behaviours have been scored as single events, which can lead to underestimates of heritability values relevant to the lifetime fitness of an organism. To test this, repeated measurements on the same individuals were undertaken for time to courtship and mating in Drosophila melanogaster in both parental and offspring generations. Although there was no detectable heritable variation for both traits when parent-offspring comparisons were based on single events, heritabilities were significant and intermediate when the behaviour of each individual was averaged over several events. Estimates for mating behaviours relevant to the fitness of organisms are therefore much higher than indicated by single-event experiments.
实证研究表明，果蝇求偶行为的遗传变异通常无法检测到，而交配速度的遗传力较低。这些模式已被用于推断交配行为与适应性之间的关联。然而，交配行为被记录为单一事件，这可能导致低估与生物体终身适应性相关的遗传力值。为了验证这一点，对黑腹果蝇亲代和子代的求偶和交配时间进行了对同一批个体的重复测量。当亲子代比较基于单一事件时，这两个性状均未检测到可遗传变异，但当对每个个体在多个事件中的行为进行平均时，遗传力显著且处于中等水平。因此，与生物体适应性相关的交配行为估计值比单事件实验所表明的要高得多。
