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A comparison of reproductive traits of four maternal lines of rabbits selected for ltter size at weaning and founded on different criteria

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A comparison of reproductive traits of four maternal lines of rabbits selected for ltter size at weaning and founded on different criteria

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dc.contributor.author Mohamed Ragab, Mohamed es_ES
dc.contributor.author Baselga Izquierdo, Manuel es_ES
dc.date.accessioned 2017-02-21T12:32:32Z
dc.date.available 2017-02-21T12:32:32Z
dc.date.issued 2011-04
dc.identifier.issn 1871-1413
dc.identifier.uri http://hdl.handle.net/10251/78112
dc.description.abstract The objective of this study was to compare four Spanish maternal lines of rabbits (A, V. H and LP) on different criteria but selected for litter size at weaning, since their foundation until present for 39, 35, 16 and 4 generations, respectively. The comparisons among the lines were performed for litter size traits and kindling interval. The first comparison made was at the foundation time of the lines, using mixed animal models (additive and non-additive permanent effects) involving the complete data set (from June 1980 to February 2009) and the full pedigree to take into account the process of selection. A second comparison was made at fixed times and location (during the six year-seasons shared at the same farm and similar conditions for lines A, V and H involving data from March 1997 to August 1998, and A, V and LP lines from September 2007 to February 2009. The models used in the second comparison did not include the complete data set nor the additive genetic effects so that line comparisons were not dependent on the genetic model. The raw means for 47,132 parities produced from 12,639 does were 9.80, 9.07, 7.79 and 6.95 rabbits for total born, number bon alive, number weaned and number marketed per litter, respectively, demonstrating high levels of prolificacy among the lines, and with a kindling interval of 49.80 days. At their respective times of foundation, line A showed the lowest litter size with mean differences (1.39 rabbits/litter for total born, 120 for number born alive, 0.84 for number weaned and 1.06 for number marketed) among the combined means of the other lines being important Lines V and H did not show significant differences for litter size traits, but for kindling interval the contrast was 330 +/- 0.72 days, which was significant and favourable to line H. LP exceeded V by approximately one rabbit for all litter size traits. The differences between the lines for kindling interval were negligible. Some interactions between lines and farm-year-seasons were important. In comparison of lines A. V and H from March 1997 to August 1998. the pattern of the differences between the line A and the others was similar to the one observed at the origin, and the only significant difference was found between lines V and H for the kindling interval (4.62 days in favour of line V). The comparison between the lines A. V and LP from September 2007 to February 2009 showed an approximation in their reproductive performance compared to the differences at the origin. Overall, good agreement was observed between the comparisons of lines for litter size traits at fixed times, using a model without genetic effects and data recorded during the time of comparisons, and the predictions derived from the model with genetic effects. Another point is the importance of the criteria in the sample of founders of lines that were used to determine the initial or starting performance levels. Therefore, it is recommended that commercial rabbit producers utilize line populations selected for the traits of economic interest rather than on a popular breed. (C) 2010 Elsevier B.V. All rights reserved. es_ES
dc.description.sponsorship This work was supported by the Spanish Research Projects (CICYT) AGL2008-03274 and ACOMP09/013 (Valencia Generality, Spain). The first author (Mohamed Ragab) appreciated the grant obtained from the Mediterranean Agronomic Institute of Zaragoza (CIHEAM), Spain. Thanks are given to Prof. Steven Lukefahr for his critical revision of this manuscript. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation Mediterranean Agronomic Institute of Zaragoza (CIHEAM), Spain es_ES
dc.relation Generalitat Valenciana [AGL2008-03274] [ACOMP09/013] es_ES
dc.relation.ispartof Livestock Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Rabbits es_ES
dc.subject Maternal lines es_ES
dc.subject Selection es_ES
dc.subject Genetic parameters es_ES
dc.subject Litter size es_ES
dc.subject Kindling interval es_ES
dc.subject.classification PRODUCCION ANIMAL es_ES
dc.title A comparison of reproductive traits of four maternal lines of rabbits selected for ltter size at weaning and founded on different criteria es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.livsci.2010.09.009
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ciencia Animal - Departament de Ciència Animal es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Ciencia y Tecnología Animal - Institut de Ciència i Tecnologia Animal es_ES
dc.description.bibliographicCitation Mohamed Ragab, M.; Baselga Izquierdo, M. (2011). A comparison of reproductive traits of four maternal lines of rabbits selected for ltter size at weaning and founded on different criteria. Livestock Science. 136(2-3):201-206. doi:10.1016/j.livsci.2010.09.009 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/ 10.1016/j.livsci.2010.09.009 es_ES
dc.description.upvformatpinicio 201 es_ES
dc.description.upvformatpfin 206 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 136 es_ES
dc.description.issue 2-3 es_ES
dc.relation.senia 216287 es_ES


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