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Titolo:
Microsatellite analysis of 6-hour-old embryos reveals no preferential intraspecific fertilization between cupped oysters Crassostrea gigas and Crassostrea angulata
Autore:
Huvet, A; Balabaud, K; Bierne, N; Boudry, P;
Indirizzi:
IFREMER, Lab Genet & Pathol, F-17390 La Tremblade, France IFREMER La Tremblade France F-17390 Pathol, F-17390 La Tremblade, France IFREMER, CNRS, UMR 5000, Lab Genome Populat Interact, F-34200 Sete, FranceIFREMER Sete France F-34200 enome Populat Interact, F-34200 Sete, France
Titolo Testata:
MARINE BIOTECHNOLOGY
fascicolo: 5, volume: 3, anno: 2001,
pagine: 448 - 453
SICI:
1436-2228(200109/10)3:5<448:MAO6ER>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
REPRODUCTIVE ISOLATION; PACIFIC OYSTER; HYBRID ZONES; SEA-URCHINS; HYBRIDIZATION; MARKERS; SPECIATION; DIVERGENCE; HETEROSIS; PARENTAGE;
Keywords:
Crassostrea gigas; Crassostrea angulata; hybridization; in vitro crossings; microsatellites; paternal contribution;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Boudry, P IFREMER, Lab Genet & Pathol, BP 133, F-17390 La Tremblade, France IFREMER BP 133 La Tremblade France F-17390 La Tremblade, France
Citazione:
A. Huvet et al., "Microsatellite analysis of 6-hour-old embryos reveals no preferential intraspecific fertilization between cupped oysters Crassostrea gigas and Crassostrea angulata", MAR BIOTEC, 3(5), 2001, pp. 448-453

Abstract

Experimental examination of reproductive isolation is the first step in understanding li,hybridization processes. Here, we studied preferential fertilization between 2 cupped oyster taxa, Crassostrea angulata and Crassostreagigas, as a potential prezygotic reproductive isolation. Early examinationof sperm competition is now possible by molecular analysis of oyster embryos. This avoids the confounding effect of differential mortality during thelarval stage. Six hundred embryos were sampled from 2 crosses. Three microsatellite loci were enough to determine without ambiguity the taxa of contributing sires of embryos. No evidence of preferential fertilization betweengametes from the same taxa was shown. A significantly higher contribution of the C. gigas males was revealed with the C. angulata females, but not with the C. gigas females, which might suggest early heterosis or interactiondifferences between gametes. In the light of these results, natural hybridization between both taxa call be expected in cases of their geographical coexistence, as in the Southern European populations in which both taxa. arein contact as a result of aquaculture development.

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Documento generato il 25/05/20 alle ore 03:24:43