Aedeagus morphology as a discriminant marker in two closely related Cactophilic species of Drosophila (Diptera; Drosophilidae) in South America

Anais da Academia Brasileira de Ciências

Fernando F. Franco²  Pedro R.r. Prado²  Fábio M. Sene²  Luciano F. Costa¹  Maura H. Manfrin¹ 

[1] ,Universidade de São Paulo Faculdade de Medicina de Ribeirão Preto Departamento de GenéticaRibeirão Preto SP ,Brasil

关键词: morphometric;    curvature;    Drosophila buzzatii cluster;    aedeagus;    morfometria;    curvatura;    cluster Drosophila buzzatii;    edeago;   

DOI  :  10.1590/S0001-37652006000200002

来源: SciELO

【 摘 要 】

Drosophila serido and D. antonietae are sibling species belonging to the Drosophila buzzatii cluster. Morphologically, they can only be discriminated by quantitative traits. In this paper we analyze the length and equalized average curvature of four regions of the aedeagus of D. antonietae and D. serido. Specimens of D. serido and D. antonietae were classified correctly 96.74% of the time. Based only on the variable that most contributed to the discrimination of the groups (equalized average curvature of the arch IV of the aedeagus), we observed significant intraspecific morphological divergence in D. serido in relation to the D. antonietae, in agreement with other markers. The high morphological divergence in equalized average curvature of the arch IV of the aedeagus shows that this region evolved faster than others, since the divergence of the two species. The importance of the present study to the understanding of the genetic basis that controls the formation of the aedeagus, in the species of the Drosophila buzzatii cluster, is discussed.

【 授权许可】

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