Artículos de revistas
Drosophila wing modularity revisited through a quantitative genetic approach
Fecha
2016-07Registro en:
Muñoz Muñoz, Francesc; Carreira, Valeria Paula; Martínez Abadías, Neus; Ortiz, Victoria Estefanía; González José, Rolando; et al.; Drosophila wing modularity revisited through a quantitative genetic approach; Society for the Study of Evolution; Evolution; 70; 7; 7-2016; 1530-1541
1558-5646
CONICET Digital
CONICET
Autor
Muñoz Muñoz, Francesc
Carreira, Valeria Paula
Martínez Abadías, Neus
Ortiz, Victoria Estefanía
González José, Rolando
Soto, Ignacio Maria
Resumen
To predict the response of complex morphological structures to selection it is necessary to know how the covariation among its different parts is organized. Two key features of covariation are modularity and integration. The Drosophila wing is currently considered a fully integrated structure. Here, we study the patterns of integration of the Drosophila wing and test the hypothesis of the wing being divided into two modules along the proximo-distal axis, as suggested by developmental, biomechanical, and evolutionary evidence. To achieve these goals we perform a multilevel analysis of covariation combining the techniques of geometric morphometrics and quantitative genetics. Our results indicate that the Drosophila wing is indeed organized into two main modules, the wing base and the wing blade. The patterns of integration and modularity were highly concordant at the phenotypic, genetic, environmental, and developmental levels. Besides, we found that modularity at the developmental level was considerably higher than modularity at other levels, suggesting that in the Drosophila wing direct developmental interactions are major contributors to total phenotypic shape variation. We propose that the precise time at which covariance-generating developmental processes occur and/or the magnitude of variation that they produce favor proximo-distal, rather than anterior-posterior, modularity in the Drosophila wing.