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The Journal of Heredity 1988:79(6):448-452
© 1988 The American Genetic Association 79:448-452

research-article

Canalization and Phenotypic Variation Caused by Changes in the Temperature of Development

E. García-Vázquez, and J. Rubio

Departamento de Biología Funcional, Facultad de Medicina, Universidad de Oviedo Spain

Address reprint requests to Dr. García-Váz-quez, Departamento Interfacultativo de Genética, Facultad de Medicina, Universidad de Oviedo, C/Julián Clavería, s/n 33006 Ovíedo, Spain.

Abstract

We studied the effect of an ambient change (temperature of development) on a few lines with different degrees of canalization obtained through selection for different criteria. The SC lines had the phenotype of two anterior scutellar extra bristles well canalized. The ADC lines had the phenotype of two anterior dorsocentral extra bristles less canalized. The AP lines were not canalized because we selected two extra bristles in asymmetric positions in these lines. Our results show that the more canalized a line is, the more resistance it has to losing the canalized phenotype: The SC lines were buffered from environmental changes, the ADC lines were less buffered, and the AP lines were susceptible because they changed their bristle phenotype at the new temperatures of development.


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