Developmental constraints in the Drosophila wing.
Selection experiments for shortening the four longitudinal veins in a wild population of Drosophila melanogaster have been performed to evaluate how a local change is integrated in the wing development. Our results show that, though many units of selection seem to exist within a given organ, these are strongly constrained within the developmental programme, in such a way that only some predictable forms are expected. The results are discussed in terms of the 'Entelechia' model proposed by Garcia-Bellido in which the intercalarity of positional values promoted by 'martial' genes in a given organ is the driving force for controlled cell proliferation.
Guerra
D
D
Dipartimento di Biologia evol. sper., Università di Bologna, Italy.
Pezzoli
M C
MC
Giorgi
G
G
Garoia
F
F
Cavicchi
S
S
D000818:Animals; D004331:Drosophila melanogaster / Q000235:genetics*; D014644:Genetic Variation; D005828:Genetics, Population; D012641:Selection, Genetic; D014680:Veins; D014921:Wings, Animal / Q000033:anatomy & histology* / Q000254:growth & development*