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Heterosis, direct and maternal additive effects on rabbit growth and carcass traits from a Canadian experiment

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Heterosis, direct and maternal additive effects on rabbit growth and carcass traits from a Canadian experiment

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dc.contributor.author Ouyed, Abida
dc.contributor.author Rivest, J.
dc.contributor.author Brun, Jean Michel
dc.date.accessioned 2011-05-09T12:55:59Z
dc.date.issued 2011
dc.identifier.issn 1257-5011
dc.identifier.uri http://hdl.handle.net/10251/10906
dc.description.abstract A total of 479 male and female rabbits from the Californian (CA), American Chinchilla (CH) and New-Zealand White (NZ) breeds and nine crosses between them were used in this experiment. This study aimed to estimate heterosis and direct and maternal additive effects as well as some non genetic effects on rabbit growth and carcass traits in order to identify the most appropriate crossbreeding plan to use for rabbit meat production under Quebec conditions. Each rabbit was identified and weighed individually at weaning (35 d) and at slaughter (63 d). Rabbits were slaughtered after an 18 h fasting period from feed only. Statistical analyses were performed solving fixed models that allow different variances between genetic types. Significant statistical differences were obtained between genetic types for rabbit growth performance. Rabbits from purebred NZ females mated to CA and NZ males or from CAxNZ and NZxCH crossbred females mated to NZ males ranked first for live weight at 35 and 63 d body weight and for average daily gain (ADG). ADG of NZxNZ, NZx(NZxCH) and NZx(CAxNZ) rabbits reached around 50 g/d and their feed conversion ratio was about 3.4. Significant differences between genetic types were observed for all carcass traits except for meat/bone ratio. Rabbits from CH, NZ, CAxNZ and NZxCH does mated to NZ males, and from NZ does mated to CA males had the highest commercial carcass weight and the lowest commercial carcass yield (CCY), whereas CHxCA rabbits ranked first with a CCY higher by 4 to 8% than rabbits from other genetic types. The highest hind part yields were obtained with CHxCH, CHxNZ and NZxCH rabbits. Concerning the intermediate part percentages, the highest values corresponded to the highest CCY. The CH breed had unfavourable direct effects but favourable maternal effects on growth traits. The CA breed had negative maternal effects on weight traits from weaning to slaughtering. The CA and CH breeds had positive direct and negative maternal effects on intermediate part yield of the carcass compared to NZ. Direct heterosis effects were found for body weight traits, particularly in the crosses involving the NZ breed, with a magnitude ranging from 5 to 10% of the parental mean. es_ES
dc.language Inglés es_ES
dc.publisher World Rabbit Science. ICTA. UPV es_ES
dc.relation.ispartof World Rabbit Science
dc.rights Reserva de todos los derechos es_ES
dc.subject Breed es_ES
dc.subject Rabbit es_ES
dc.subject Growth es_ES
dc.subject Carcass es_ES
dc.subject Crossbreeding es_ES
dc.subject Maternal effects es_ES
dc.subject Heterosis es_ES
dc.title Heterosis, direct and maternal additive effects on rabbit growth and carcass traits from a Canadian experiment es_ES
dc.type Artículo es_ES
dc.date.updated 2011-05-06T13:12:24Z
dc.identifier.doi 10.4995/wrs.2011.783
dc.rights.accessRights Abierto es_ES
dc.description.bibliographicCitation Ouyed, A.; Rivest, J.; Brun, JM. (2011). Heterosis, direct and maternal additive effects on rabbit growth and carcass traits from a Canadian experiment. World Rabbit Science. 19(1). doi:10.4995/wrs.2011.783. es_ES
dc.description.accrualMethod SWORD es_ES
dc.description.volume 19
dc.description.issue 1
dc.identifier.eissn  1989-8886
dc.identifier.eissn 1989-8886 es_ES


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