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Titolo:
PHENOTYPIC PLASTICITY AND DEVELOPMENTAL TEMPERATURE IN DROSOPHILA - ANALYSIS AND SIGNIFICANCE OF REACTION NORMS OF MORPHOMETRICAL TRAITS
Autore:
DAVID JR; GIBERT P; GRAVOT E; PETAVY G; MORIN JP; KARAN D; MORETEAU B;
Indirizzi:
CNRS,LAB POPULAT GENET EVOLUT F-91198 GIF SUR YVETTE FRANCE MAHARSHI DAYANAND UNIV,DEPT BIOSCI ROHTAK 124001 HARYANA INDIA
Titolo Testata:
Journal of thermal biology
fascicolo: 6, volume: 22, anno: 1997,
pagine: 441 - 451
SICI:
0306-4565(1997)22:6<441:PPADTI>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
THORACIC TRIDENT PIGMENTATION; NATURAL-POPULATIONS; VARIABLE ENVIRONMENT; GENETIC CORRELATIONS; GROWTH TEMPERATURE; ISOFEMALE LINES; THERMAL-STRESS; BODY-SIZE; MELANOGASTER; SELECTION;
Keywords:
POLYNOMIAL ADJUSTMENTS; CHARACTERISTIC VALUES; BODY PIGMENTATION; BODY SIZE; WING LENGTH; THORAX LENGTH; INTERSPECIFIC COMPARISONS; REGULATORY GENES; NATURAL POPULATIONS; THERMAL RANGE;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
42
Recensione:
Indirizzi per estratti:
Citazione:
J.R. David et al., "PHENOTYPIC PLASTICITY AND DEVELOPMENTAL TEMPERATURE IN DROSOPHILA - ANALYSIS AND SIGNIFICANCE OF REACTION NORMS OF MORPHOMETRICAL TRAITS", Journal of thermal biology, 22(6), 1997, pp. 441-451

Abstract

In ectotherm species like Drosophila, morphometrical quantitative traits exhibit a large amount of phenotypic plasticity as a consequence of developmental temperature. Generally the response curves called reaction norms, are non-linear and exhibit either single max-ma or minima,or a sigmoid shape. Up to now, such complex shapes were mainly considered as non-adaptive, reflecting interactions between internal developmental constraints and the environment. We show that the general, all purpose method of polynomial adjustment provides a convenient way for the description of the norms. From the polynomial parameters, characteristic values with an obvious biological significance (e.g, the temperature of a maximum size), can be calculated and used for comparing populations or species. Experimental data on body pigmentation and body size show that the shapes of the reaction norms are genetically variable and suggest adaptive responses to the environment. The possible occurrence of specific regulatory genes acting on norm shape will be a matter fur further investigations. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/07/20 alle ore 22:25:09