Data/hora: 13/06/2024 08:07:43

Provedor de dados: 	5	
País: 	France	
Título: 	Genetic improvement and selection in shellfish : a review based on oyster research and production	
Autores: 	Boudry, Pierre; Barre, Marc; Gerard, Andre.	
Data: 	1998-06	
Ano: 	1998	
Palavras-chave: 	Selective breeding; Hybridization; Polyploidy; Introduction; Oyter; Sélection; Hybridation; Polyploïdie; Introduction; Huîtres.	
Resumo: 	Despite the economic importance of shellfish, genetic improvement has not yet had a great impact on these species. Shellfish farming is traditionally based on wild species whose natural populations are often overexploited and do not fulfil market demand. Up to now, the most effective answer 10 disease problems or for the improvement of productivity has been the introduction of new species. However, the introduction of new species is constrained by their ecological impact and is also limited by the availability 01 suitable species. Genetic improvement of local species should therefore be of great importance as a viable alternative for the long term sustainability 01 the shellfish Industry. The different approaches 10 genetic improvement include polyploidization. hybridization and selection. Polyploidization has the most potential for ,Immediate application to commercial breeding as triploid induction has already been achieved for many shellfish species. Comparative performance of triploids versus diploids has been studied in detail in 0yslers: triploids show better growth performances due to a reduced reproductive output and reduced energy requirement associated with greater heterozygosity. Hybridizations among species can also be a source of novelty, but interspecific hybrids often show reduced performance compared to their parents. Experimental breeding programmes for disease resistance or growth performance show that heritable variation exists for these traits and that genetic improvement can be achieved by selection. At present, these breeding programmes still have to reach a scale enabling proper genetic diversity management, multi-site testing or effective improvement of the commercial stocks. Public research institutes, commercial bivalve hatcheries and shellfish farmers should cooperate to adopt selective breeding programmes as an integral part 01 the husbandry of shellfish species.	
Tipo: 	Text	
Idioma: 	Inglês	
Identificador: 	http://archimer.ifremer.fr/doc/1998/publication-2740.pdf	
Editor: 	CIHEAM	
Relação: 	http://archimer.ifremer.fr/doc/00000/2740/	
Formato: 	application/pdf	
Fonte: 	Cahiers Options Méditerranéennes (CIHEAM), 1998-06 , Vol. 34 , P. 61-75	
Fonte: 	CIHEAM