Heterosis, maternal and direct genetic effects for litter performance and reproductive intervals in rabbit crosses
A crossbreeding experiment was carried out in Egypt involving a local breed (Baladi Red, BR) was and an exotic one (New Zealand effects White, and N ) to estimate direct heterosis, maternal additive effects and direct additive effects on some litter traits and reproductive intervals in doe rabbits. Litter traits included litter size and weight and mean yourg weight (at birth, 21 days and at weaning), number bom alive and preweaning litter gain and mortality, while reproductive intervals included days open (interval from kindling to next conception) and kindling interval (period between two consecutive parturitions). Data were analysed using a linear mixed model. Winter kindlings recorded the largest litter size and the heaviest weight and gain of litter weight up to weaning along with the lowest preweaning mortality compared to autumn and spring kindlings. Heterosis was found at weaning on litter size and weight at weaning and on some interval traits but not on litter size at birth, where negative values are found. Crossbred litters obtained from mating BR bucks with NZ does were generally associated with superiority compared to those litters obtained from the reverse mating. Maternal additive effects on all letter traits were in favor of NZ breed, although the differences between the two breeds were not significant. In terms of reproductive intervals, BR-mothered litters. For all litters traits and reproductive intervals, the direct additive effect was not significant. NZ-sired litters had higher direct additive effects compared to BR-sired litters, while BR-sired litters recorded shorter reproductive intervals relative to NZ-sired litters.
ABDELLA M.M., AFIFI E.A., EL-SAYAAD G.A.E., EL MADHAGI, K.S.S., 1990 : Effect of dietary protein level, fiber level and other factors on rabbits performance. 1-Productive performance of rabbit does. Ann. of Agri. Sci., Moshtohor, 28(4), 2101-2112, Egypt.
AFIFI E.A., 1971 : A study of some economical and productive characters in some breeds of rabbits and their crosses. Ph.D. Thesis, Faculty of Agriculture, Ain-Shams University, Egypt.
AFIFI E.A., EMARA M.E., 1984 : Litter weight in local Egyptian and exotic breeds of rabbits and their crosses. In : Proc. 3rd World Rabbit Congress, Rome, Italy, Vol. QG1, 126-135.
AFIFI E.A., KHALIL M.H., 1989 : Observations on purebred and crossbred litters of Giza White and Grey Giant Flander rabbits in Egypt. J. of Appl. Rabbit Res., 12, 273-277.
AFIFI E.A., KHALIL M.H., KHADR Amina F., Y0USSEF Y.M.K., 1994 : Heterosis, maternal and direct effects for postweaning growth traits and carcass performance in rabbit crosses. J. Anim. Breed. and Genet., 111, 138-147. https://doi.org/10.1111/j.1439-0388.1994.tb00447.x
BRUN, J.M. 1993 : Parametres du croisement entre 3 souches de lapin et analyse de la réponse a une selection sur la taille de portée: caracteres des portées a la naissance et au sevrage. Genet. Sel. Evol., 25, 459-474. https://doi.org/10.1186/1297-9686-25-5-459
CARREGAL R.D., 1980 : Evaluation of heterosis, combining ability and maternal and reciprocal mating effects· in rabbits. In : Proc. 2nd World Rabbit Congress, Barcelona, Spain.
DICKERSON G.E., 1992 : Manual for evaluation of breeds and crosses of domestic animals. Food and Agriculture Organization of the United Nations, Rome, 47 p.
EL-DESOKI A.E.M., 1991 : Study of the effect of some genetic and environmental factors affecting meat yield from some foreign and local breeds of rabbits and their crosses. M.Sc. Thesis, Faculty of Agriculture, Mansoura University, Egypt.
EL-QEN R.Y.N., 1988 : Genetic and environmental studies on rabbits. M. Sci. Thesis, Faculty of Agriculture, Tanta University, Egypt. GALAL, E.S.E ..
GALAL E.S.E., KHALIL M.H., 1994: Development of rabbit industry in Egypt. Options Méditerranéennes, 8, 43-56.
HARVEY W.R., 1990 : User's Guide for LSMLMW. Mixed model least squares and maximum likelihood computer program. PC-Version 2. Ohio State University, Columbus, USA (Mimeograph).
KHALIL M.H., 1994 : Development of rabbit industry in Egypt. Options Mediterranéennes, 8, 43-56. KHALIL M.H., 1994: Lactational performance of Giza White rabbits and its relation with preweaning litter traits.Anim. Prod., 59, 141-145. https://doi.org/10.1017/S0003356100007595
KHALIL M.H., AFIFI E.A., OWEN J.B., 1987 : A genetic analysis of litter traits in Bouscat and Giza White rabbits. Anim. Prod., 45, 123-134. https://doi.org/10.1017/S0003356100036710
LUKEFAHR S., HOHENB0KEN W.D., CHEEKE P.R., PAIT0N N.M., 1983a : Doe reproduction and preweaning litter performance of straightbred and crossbred rabbits. J. Anim. Sci., 57(5), 1090-1099. https://doi.org/10.2527/jas1983.5751090x
LUKEFAHR S., H0HENB0KEN W.D., CHEEKE P.R., PAIT0N N.M., 1983b: Characterization of straightbred and crossbred rabbits for milk production and associative traits. J. Anim. Sci., 57(5), 1100-1107. https://doi.org/10.2527/jas1983.5751100x
MAS0ER0 G., UBERTALLE A., MAZZ0CC0 P., BAITAGLINI L.M., 1985 : Terminal crossing of New Zealand White and Californian Rabbits. (2) Characteristics on the live animal. Annali dell Istituto Sperimentale per la Zootecnia, 18(2), 93-109. (Animal Breeding Abstract, 55, No. 1264).
OUDAH S.M., 1990 : Studies on sorne rabbit breeds and their crosses. M. Sci. Thesis, Faculty of Agriculture, Mansoura University, Egypt.
OZIMBA C.E., LUKEFAHR S.D., 1991 : Comparison of rabbit breed types of postweaning litter growth, feed efficiency and survival performance traits. J. Anim. Science, 69, 3494-3500. https://doi.org/10.2527/1991.6993494x
PARTRIDGE G.G., F0LEY S., C0RRIGALL W., 1981 : Reproductive performance in purebred and crossbred commercial rabbits. Anim. Prod., 32, 325-331. https://doi.org/10.1017/S0003356100027227
R0UVIER R., BRUN J.M., 1990 : Crossbreeding and selection experiments with rabbits An overview from studies in France about litter traits. Options Mediterraneennes, Serie Seminaire, 8, 29-34.
SEDKI A.E., 1991 : Some behavioural studies on rabbits. M.Sc. Thesis, Faculty of Agriculture, Zagazig University, Egypt.
Metrics powered by PLOS ALM
Cited-By (articles included in Crossref)
This journal is a Crossref Cited-by Linking member. This list shows the references that citing the article automatically, if there are. For more information about the system please visit Crossref site
1. Genetic analysis of growth traits in the progeny of rabbit does from a diallel cross
C. Mínguez, J.P. Sánchez, J.M. Brun, M. Ragab, A.G. El Nagar, M. Baselga
World Rabbit Science vol: 23 issue: 4 first page: 211 year: 2015
Official journal of the World Rabbit Science Association (WRSA)
e-ISSN: 1989-8886 ISSN: 1257-5011 https://doi.org/10.4995/wrs