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Studies of the species barrier between Drosophila subobscura and D. madeirensis IV. A genetic dissection of the X chromosome for speciation genes
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Autores
Orientador(es)
Resumo(s)
The genetics of four traits contributing to the isolation mechanism between the
two closely related species of Drosophilu belonging to the obscuru group, D.
subobscura and D. madeirensis, have been investigated, especially regarding the
influence exerted by the X chromosome. This chromosome has been roughly
dissected genetically by the use of four markers. It was found that factors affecting
viability of backcross males are spread from the centromeric end of the chromo some up the region marked by Bx. Three sections were responsible for male
sterility/fertility. The abnormal head shape of the backcross males was affected by
factor(s) on the madeirensis and the subobscura sex chromosome located at the
region of MAD1 inversion. Finally, an abnormal trait in these males (presence of
extra sex combs) was found to be controlled by four sections, two on the
madeirrnsis X chromosome and two on the subobscuru one.
Descrição
Palavras-chave
Drosophila subobscura Drosophilu madeirensis Speciation factors X-chromosome speciation regions Isolating mechanism . Faculdade de Ciências da Vida
Contexto Educativo
Citação
Khadem, M., & Krimbas, C. B. (1997). Studies of the species barrier between Drosophila subobscura and D. madeirensis IV. A genetic dissection of the X chromosome for speciation genes. Journal of Evolutionary Biology, 10(6), 909-920. https://doi.org/10.1111/j.1420-9101.1997.tb00005.x
Editora
Wiley