Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Short-term evolution of competition between genetically homogeneous and heterogeneous populations of Drosophila melanogaster
Autore:
Becerra, M; Brichette, I; Garcia, C;
Indirizzi:
Univ Santiago, Fac Biol, Area Xenet, A Coruna 15706, Galicia, Spain Univ Santiago A Coruna Galicia Spain 15706 A Coruna 15706, Galicia, Spain
Titolo Testata:
EVOLUTIONARY ECOLOGY RESEARCH
fascicolo: 5, volume: 1, anno: 1999,
pagine: 567 - 579
SICI:
1522-0613(199907)1:5<567:SEOCBG>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
RED QUEEN HYPOTHESIS; FRESH-WATER SNAIL; SEXUAL REPRODUCTION; BIOLOGICAL ENEMIES; HETERONOTIA-BINOEI; NATURAL-SELECTION; FEEDING-BEHAVIOR; CLONAL-DIVERSITY; BODY-SIZE; DENSITY;
Keywords:
co-existence; evolution of sex; genetic homogeneity; intraspecific competition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Garcia, C Univ Santiago, Fac Biol, Area Xenet, A Coruna 15706, Galicia, Spain Univ Santiago A Coruna Galicia Spain 15706 5706, Galicia, Spain
Citazione:
M. Becerra et al., "Short-term evolution of competition between genetically homogeneous and heterogeneous populations of Drosophila melanogaster", EVOL EC RES, 1(5), 1999, pp. 567-579

Abstract

Sexual reproduction may confer an advantage in intraspecific competition. We tested this by studying the evolution of larval competition between two populations of the fruit fly Drosophila melanogaster, one of them having genetic variability and the other being highly homogeneous, like an asexual strain would be. We found a clear response in competitive ability in the heterogeneous populations competing with three of the four genotypes assayed as homogeneous populations. In only six generations was this response enoughto cancel out the double advantage in reproductive rate that would be expected in an asexually reproducing female. However, the outcome of the competition was genotype-dependent, as the fourth homogeneous genotype developed a competitive advantage through the generations. Thus, selection for larvalcompetitive ability could play an important role in the maintenance of sexual reproduction in Drosophila, but would not be enough to ensure it, as some genotypes could overcome its effect if switching to asexual reproduction.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:33:49