Caligari P D
Heredity (Edinb). 1980 Oct;45(2):219-31. doi: 10.1038/hdy.1980.62.
A competition experiment with Drosophila melanogaster is reported which comprised a replacement series with two genotypes, together with pure cultures of both genotypes at the same densities as they appeared in the mixtures. The results for total numbers and weights make clear the need to separate the intergenotypic from the intragenotypic interactions if an unambiguous interpretation of the outcome of such mixtures is to be obtained. Further experiments were carried out to investigate the behaviour of pure cultures in order to gain insight into the relative simplicity or complexity of the intragenotypic interactions that needed to be taken into account when investigating mixtures. It was found that transformation of the measurements into percent survival and average weight per fly led to relations with density which were more nearly linear than the originals and, hence, were more readily amenable to analysis. Two main points emerged from the experiments. First, the relationship between the two transformed characters did not appear straightforward. Secondly, the intragenotypic interactions, particularly for percent survival, were complex and thus provided not support for assuming them to be simple when present in mixtures of genotypes.
本文报道了一项针对黑腹果蝇的竞争实验，该实验包含两个基因型的替代系列，以及两种基因型在混合物中出现时相同密度下的纯培养物。关于总数和重量的结果表明，如果要对这种混合物的结果进行明确解释，就需要将基因型间相互作用与基因型内相互作用区分开来。为了深入了解在研究混合物时需要考虑的基因型内相互作用的相对简单性或复杂性，还进行了进一步的实验来研究纯培养物的行为。结果发现，将测量值转换为存活率百分比和每只果蝇的平均重量后，与密度的关系比原始关系更接近线性，因此更易于分析。实验得出了两个主要观点。第一，两个转换后的性状之间的关系并不直接。第二，基因型内相互作用，特别是存活率百分比方面的相互作用很复杂，因此在基因型混合物中存在时，不能简单地假设它们是简单的。
