Gynandromorph fate map of the wing-disk compartments inDrosophila melanogaster
Genetic mosaics have been used to ascertain the clonal ancestry of various structures during the development of Drosophila. The analysis of gynandromorphs allows us to infer the relative locations and relative distances between presumptive structures upon an embryonic (blastoderm) fate map (Garcia-B...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1975 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/47518 |
| Acceso en línea: | http://hdl.handle.net/10261/47518 |
| Access Level: | acceso abierto |
| Palabra clave: | Gynandromorph Drosophila |
| Sumario: | Genetic mosaics have been used to ascertain the clonal ancestry of various structures during the development of Drosophila. The analysis of gynandromorphs allows us to infer the relative locations and relative distances between presumptive structures upon an embryonic (blastoderm) fate map (Garcia-Bellido and Merriam, 1969). Since male cell clones are initiated in gynandromorphs before blastoderm formation, such an analysis cannot inform us about determinative steps that define cells as belonging to specific imaginal disks or disk regions. Determinative events, however, can be inferred from data of clones initiated by mitotic recombination at different stages of development (Garcia-Bellido, l~ipoll and Morata, 1973, 1975). It was shown that recombinant clones initiated after embryogenesis never cross a demarcation line separating an anterior from a posterior population of cells. Homologous subdivisions seem to occur in the dorsal mesothoracic (Garcia-Bellido etal., 1973, 1975), in the metathoracie (Morata and Gareia-Bellido, 1975) and in all the ventral thoracic disks (E. Steiner, pets. comm.). In principle, anterior and posterior populations of cells could arise in early embryogenesis as separated anlagen (subsegments) that fuse during subsequent development. On the other hand, they could correspond to a single anlage that becomes compartmentalized early in development. It is therefore interesting to know how the presumptive anterior and posterior cells are located relative to each other in the fate map of gynandromorphs. |
|---|