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Titolo:
PHENOTYPIC PLASTICITY AND REACTION NORMS IN TEMPERATE AND TROPICAL POPULATIONS OF DROSOPHILA-MELANOGASTER - OVARIAN SIZE AND DEVELOPMENTAL TEMPERATURE
Autore:
DELPUECH JM; MORETEAU B; CHICHE J; PLA E; VOUIDIBIO J; DAVID JR;
Indirizzi:
CNRS,UPR POPULAT GENET & EVOLUT F-91198 GIF SUR YVETTE FRANCE UNIV BRAZZAVILLE,FAC SCI,GENET POPULAT LAB BRAZZAVILLE CONGO
Titolo Testata:
Evolution
fascicolo: 4, volume: 49, anno: 1995,
pagine: 670 - 675
SICI:
0014-3820(1995)49:4<670:PPARNI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
NATURAL-POPULATIONS; QUANTITATIVE GENETICS; FLUCTUATING ASYMMETRY; SELECTION; SIMILARITIES; ENVIRONMENT; CHARACTERS; EVOLUTION;
Keywords:
CLIMATIC ADAPTATION; DROSOPHILA MELANOGASTER; FLUCTUATING ASYMMETRY; GEOGRAPHIC RACES; NORMS OF REACTION; OVARIOLE NUMBER; PHENOTYPIC PLASTICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
43
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Delpuech et al., "PHENOTYPIC PLASTICITY AND REACTION NORMS IN TEMPERATE AND TROPICAL POPULATIONS OF DROSOPHILA-MELANOGASTER - OVARIAN SIZE AND DEVELOPMENTAL TEMPERATURE", Evolution, 49(4), 1995, pp. 670-675

Abstract

The plasticity of ovariole number relative to developmental temperature was studied in three populations of Drosophila melanogaster at bothends of the cline: a temperate French population and two equatorial Congolese. Ovary size was much greater in the French flies, in agreement with an already known latitudinal dine. Among isofemale lines, significant differences in genetic variability were observed between populations with a maximum variability at intermediate temperatures. Parameters of phenotypic variability (CV and FA) were not statistically different among lines or populations, but a significant increase at low temperature was demonstrated for both. The shapes of the response curves (i.e., the norm of reaction) were analyzed by adjusting the data to a quadratic equation. The parameters of the equation were highly variable among lines. On the other hand, the temperature for maximum value ofovarioles (TMV) was much less variable and exhibited only a slightly significant difference between temperate and tropical flies (22.2 degrees C vs. 22.7 degrees C). During its geographic extension toward colder places, D. melanogaster underwent a large, presumably adaptative, increase in ovariole number but very little change in the norm of reaction of that trait.

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Documento generato il 02/07/20 alle ore 22:12:58