Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
GROWTH TEMPERATURE AND ADULT PIGMENTATION IN 2 DROSOPHILA SIBLING SPECIES - AN ADAPTIVE CONVERGENCE OF REACTION NORMS IN SYMPATRIC POPULATIONS
Autore:
GIBERT P; MORETEAU B; MORETEAU JC; DAVID JR;
Indirizzi:
CNRS,LAP POPULAT GENET & EVOLUT F-91198 GIF SUR YVETTE FRANCE UNIV METZ,LAB DEMOECOL F-57000 METZ FRANCE
Titolo Testata:
Evolution
fascicolo: 6, volume: 50, anno: 1996,
pagine: 2346 - 2353
SICI:
0014-3820(1996)50:6<2346:GTAAPI>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
GENOTYPE-ENVIRONMENT INTERACTION; THORACIC TRIDENT PIGMENTATION; PHENOTYPIC PLASTICITY; NATURAL-POPULATIONS; MORPHOMETRICAL TRAITS; GENETIC-VARIABILITY; ISOFEMALE LINES; MELANOGASTER; EVOLUTION; SELECTION;
Keywords:
BODY PIGMENTATION; DROSOPHILA MELANOGASTER; DROSOPHILA SIMULANS; GROWTH TEMPERATURE; ISOFEMALE LINES; NORMS OF REACTION; PHENOTYPIC PLASTICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
P. Gibert et al., "GROWTH TEMPERATURE AND ADULT PIGMENTATION IN 2 DROSOPHILA SIBLING SPECIES - AN ADAPTIVE CONVERGENCE OF REACTION NORMS IN SYMPATRIC POPULATIONS", Evolution, 50(6), 1996, pp. 2346-2353

Abstract

Phenotypic plasticity of abdomen pigmentation was investigated in populations of the sibling species Drosophila melanogaster and D. simulans, living in sympatry in two French localities. Ten isofemale lines ofeach population and species were grown at different constant temperatures spanning their complete thermal range from 12 to 31 degrees C. Genetic variability between isofemale lines was not affected by growth temperature, but was consistently less in D. simulans. For all traits, the dark pigmentation of the abdominal segments decreased according togrowth temperature, in agreement with the thermal budget adaptive hypothesis. The shapes of the response curves were different between the abdominal segments, but for a given segment, quite similar in the two species. On average D. simulans was lighter than D. melanogaster, but the difference was mainly expressed at higher temperatures. An interesting result was the difference observed between the two localities: flies from the colder locality (Villeurbanne) were found to be darker than Airs from the warmer locality (Bordeaux). Interestingly, this difference was expressed only at low temperatures, 21 degrees C and below, that is, at temperatures encountered in natural conditions. This suggests an adaptive response resulting in a change of the shape of reaction norm and involving genotype-environment interactions. When comparingthe genetic structure of geographic populations for quantitative traits, several laboratory environments should be preferred to a single one.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 20:50:39