The role of genic selection in the establishment of inversion polymorphism in Drosophila subobscura |
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| Authors: | M. Santos |
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| Affiliation: | (1) Departamento de Genética, Facultad de Biología, Universidad de santiago de Compostela, Spain;(2) Present address: Departamento de Genética, Facultad de Cieneias, Universidad Autónoma de Barcelona, Bellaterra (Barcelona), Spain |
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| Abstract: | A model for explaining the establishment of newly arisen inversions in natural populations, in which the inverted segment may be selected for if its load of deleterious mutations is smaller than the average load of the noninverted segment in the population, is tested for Drosophila subobscura. The results show that for new inversions, originally with no deleterious alleles, the expected cumulative distribution of inversion lengths fits fairly well with the observed one. Therefore, genic selection may be an important cause of the establishment of newly arisen inversions in natural populations of D. subobscura. The applicability of the model to the maintenance of the inversion polymorphism present in this species; is discussed. |
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