Norry F M, Vilardi J C, Fernandez Iriarte P, Hasson E
Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas y Nat., Universidad de Buenos Aires, Argentina.
Hereditas. 1997;126(3):225-31. doi: 10.1111/j.1601-5223.1997.00225.x.
Genetic variation in correlations among size-related traits of head, thorax, and wings was examined in Drosophila buzzatii, by comparing the pattern of the Phenotypic Correlation Matrix (Rp) between inversion karyotypes of the second chromosome. No similarity in Rp was observed between some karyotypes in a natural population. The pattern of Rp in wild-reared heterokaryotypes, but not in homokaryotypes, was similar to the whole population represented by laboratory-reared flies. While phenotypic correlations in wild-reared flies were found to be larger than in laboratory-reared flies, similarity in the pattern of Rp was very high for one homokaryotype reared in both environments: the relatively homogeneous lab environment and the more variable field environment. While no such a similarity across environments was detected between different karyotypes, the pattern of Rp was similar for a same homokaryotype in different populations. Thus, the lack of karyotypic similarity in Rp is, at least partially, genetic. These results indicate that chromosomal inversions are factors affecting genetic correlations among traits known to be phenotypically correlated with adult fitness components in this species.
通过比较果蝇（Drosophila buzzatii）第二条染色体倒位核型之间的表型相关矩阵（Rp）模式，研究了头部、胸部和翅膀大小相关性状之间相关性的遗传变异。在自然种群中，某些核型之间未观察到Rp的相似性。野生饲养的异核型而非同核型的Rp模式，与实验室饲养果蝇所代表的整个种群相似。虽然发现野生饲养果蝇的表型相关性大于实验室饲养果蝇，但在两种环境中饲养的一种同核型（相对同质的实验室环境和变化更大的野外环境）的Rp模式相似性非常高。虽然不同核型之间未检测到跨环境的这种相似性，但同一同核型在不同种群中的Rp模式相似。因此，Rp中缺乏核型相似性至少部分是遗传的。这些结果表明，染色体倒位是影响该物种中已知与成年适应性成分表型相关的性状之间遗传相关性的因素。
