Colonization of America by Drosophila subobscura: Experiment in natural populations that supports the adaptive role of chromosomal-inversion polymorphism

摘要: Abstract North America and South have recently been colonized by the Palearctic species Drosophila subobscura. This double colonization offers a rare opportunity for evolutionary studies. Correlations between chromosomal arrangement frequencies latitude were calculated colonizing populations. Signs of these correlations are highly coincident with those found in Old World. These results provide experimental support adaptive value chromosomal-inversion polymorphism; historical other nonadaptive explanations thus excluded or relegated to secondary role.