Castro José A, Oliver Pedro, Christie John S, Picornell Antònia, Ramon Misericòrdia, Moya Andrés
Laboratori de Genètica, Departament de Biologia, Facultat de Ciències, Edifici Guillem Colom, Universitat de les Illes Balears, Campus de la UIB, 07122 Palma de Mallorca (Balears), Spain.
Genetica. 2003 Nov;119(3):295-301. doi: 10.1023/b:gene.0000003656.19330.ba.
The mating pattern and female fertility on the two main mitochondrial DNA haplotypes (I and II) of Drosophila subobscura were studied, in an attempt to find possible differences between them in relation to sexual selection or isolation that could explain the populational dynamics and the co-existence of these two strains in nature. The mating pattern indicated an assortative mating in population cages, where couples of the same haplotype, mainly those of haplotype I, mated more often. However, the significations detected in laboratory conditions disappeared in wild populations, where random mating was the rule. The female fertility also showed differences in the laboratory compared to the wild, since couples with haplotype I males were more efficient in the laboratory populations. These results, together with others that we previously obtained, either point to selection acting directly on the mtDNA or to the presence of some kind of cytonuclear co-adaptation in these two haplotypes, although this must be modulated by other factors that change with the seasons and time. The end result could well be a balance of opposite forces acting on both haplotypes.
对暗果蝇两种主要线粒体DNA单倍型（I和II）的交配模式和雌性生育力进行了研究，试图找出它们在性选择或隔离方面可能存在的差异，这些差异可以解释这两种菌株在自然界中的种群动态和共存情况。交配模式表明在种群饲养笼中存在选型交配，相同单倍型的果蝇对，主要是单倍型I的果蝇对，交配更为频繁。然而，在实验室条件下检测到的这种显著性在野生种群中消失了，在野生种群中随机交配才是常态。与野生种群相比，雌性生育力在实验室中也表现出差异，因为在实验室种群中，与单倍型I雄性果蝇配对的雌性生育效率更高。这些结果，连同我们之前获得的其他结果，要么表明选择直接作用于线粒体DNA，要么表明这两种单倍型中存在某种核质共适应现象，尽管这必须受到随季节和时间变化的其他因素的调节。最终结果很可能是作用于两种单倍型的相反力量达到平衡。
