title: Developmental constraints in the Drosophila wing.
abstract: 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.
authors.affiliation: Dipartimento di Biologia evol. sper., Università di Bologna, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Guerra
authors.forename: M C
authors.initials: MC
authors.lastname: Pezzoli
authors.forename: G
authors.initials: G
authors.lastname: Giorgi
authors.forename: F
authors.initials: F
authors.lastname: Garoia
authors.forename: S
authors.initials: S
authors.lastname: Cavicchi
mesh_terms: 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*