Genetic and non-genetic factors affecting milk production and preweaning litter traits of New Zealand white does under egyptian conditions
DOI:
https://doi.org/10.4995/wrs.1995.250Abstract
To study the genetic and non genetic factors affecting doe milk production and preweaning litter performance, 519 litters of New Zealand White raboit were used. Sire significantly (P<0.05) affected milk yield of the first week only, while doe affected significantly (P<0.01) milk yield of most of the experimental penods except the fourth week which was insignificantly affected. Milk yield was the highest in the second parity. Season of kindling affected significantly (P<0.01) milk yield in most of the weeks of the study, except the fourth which was insignificantly affected and showed the lowest yield at summer. Litter size at birth affected significantly (P<0.01) milk yield which increased by the increase of the number of young at birth. The peak of milk production was 155.3 g/day at the third week of lactation. Sire affected insignificantly most of preweaning performances traits studied except litter size at birtfl (P<0.05). Doe affected significantly (P<0.01) litter size and weight at birth and weaning. Parity affected significantly (P<0.01) each of litter size and weight at weaning as well as preweaning mortality. Season of kindling affected rnsignificantly litter size and weight at birth and significantly (P<0.01) at weaning. Days open (from kindling to fertile mating) showed highly s1gnificant (P<0.01) effects on all preweaning litter traits studied. Each of heritability and repeatability estimates for milk yield and litter performance traits studied were, in general, low.
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ABO EL-EZZ Z., HASSAN A., SAMAK M. (1981). Effect of litter size and mating cycles on lactation in rabbits. Alexandria J. Agri. Res., 29, 75-82.
AFFI E.A., GALAL S.E., EL TAWILL E.A., KISHIN S.S (1977). Litter weight in three breeds of rabbits and their crosses. Egyptian J. Anim. Prod., 16, 99-108.
BASELGA M., GOMEZ E., CIFRE P., CAMACHO J. (1992). Genetic diversity of litter size traits between parities in rabbits. 5th World Rabbit Congress, Corvallis, Oregon, USA.
BROECK L.V., LAMPO P.H. (1975). The influence of some non-genetic factors on the breeding results of rabbits. Archiv fur Geflugelkunde, 39, 84-90.
EL-MAGHAWRY A.M., SOLIMAN A.M., KHALIL M.H. (1993). Doe milk production as affected by some genetic and environmental factors in New Zealand White and Californian rabbits under Egyptian conditions. Egyptian J. Rabbit Sci., 3, 141-150.
FERRAZ J.B.S., JOHNSON R.K., VAN VLECK L.D. (1992). Estimation of genetic trends and genetic parameters for reproductive and growth traits of rabbits raised in subtropics with animal models. J. Appli. Rabbit Res., 15, 131-142.
GARCIA F., BASELGA M., BLASCO A., DELTORO J. (1982a). Genetic analysis of some productive traits in meat rabbits. l. Numeric traits. In : Proc. of 2nd World Congress of Genetic Applied to Livestock Production, Madrid, Spain, 7, 557-562.
GARCIA F., BASELGA M., BLASCO A., DELTORO J. (1982b ). Genetic analysis of some productive traits in meat rabbits. 2. Ponderer traits. In : Proc. of 2nd World Congress of Genetic Applied to Livestock Production, Madrid, Spain, 7, 575- 579.
HARVEY W.R. (1990). Mixed Model Least-Squares and Maximum Likehood Computer Program. PC-2 version. Ohio State University, Colombus, USA.
JOHANSSON I, VENGE 0. (1953). A study of the variation in weight during growth and in sorne skletal characteristics of adult rabbits. Ann. Royal Agr. Coll. of Sweden, 19, 161.
KHALIL M.H. (1993). Genetic evaluation of the lactation performance in Giza White rabbits and its relation with preweaning litter traits. Egyptian J. Rabbit Sci., 3, 113-128.
KHALIL M.H., AFIFI E.A., EMARA M.E. (1987). Doe litter performance at weaning for two breeds of rabbits with special emphasis on sire and doe effects. J. Appl. Rabbit Res., 10, 12-18.
LAMMERS H.J., PETERSON J., PAUW R. (1988). Studies on the reproductive performance of female hybrid rabbits under different intensities of use. In : Proc. of 4th World Rabbit Congress, Budapest, Hungary, 264-275.
LUKEFAHR S., HOHENBOKEN W.D., CHEEKE P.R., PATTON N.M. (1983a). Doe reproduction and preweaning litter performance of straightbred and crossbred rabbits. J. Anim. Sci., 57, 1090-1099. https://doi.org/10.2527/jas1983.5751090x
LUKEFAHR S., HOHENBOKEN W.D., CHEEKE P.R., PATTON N.M. (1983b). Characterization of straightbred and crossbred rabbits for milk production and associative traits. J. Anim. Sci., 57, 1100-1107. https://doi.org/10.2527/jas1983.5751100x
MC NITT J.I., LUKEFAHR S.D. (1990). Effects of breed parity, day of lactation and number of kits on milk production of rabbits. J. Anim. Sci., 68, 1505-1512. https://doi.org/10.2527/1990.6861505x
PANELLA F., BATTAGLINI M., CASTELLINI C, ROSATI A., FACCHIN E. (1992). Comparison between two genetic evaluation indexes in rabbit. J. Appl. Rabbit Res, 15, 190-197.
PATIAL K.K., MANUJA N.K., GUPTA K., SANJEET K. (1991). The effects of season on litter size of broiler rabbits in Himachal Pradesh (India). J. Appl. Rabbit Res., 14, 257-259.
PATRAS J. (1985). The use of heritability coefficients in improving the performance of rabbits. Chovatel, 24, 225-226.
SANCHEZ W.K., CHEEKE P.R., PATTON N.M. (1985). Effect of dietary eructe protein level on the reproductive performance and growth of Nea Zealand White rabbits. J. Anim. Sci., 60, 1029. https://doi.org/10.2527/jas1985.6041029x
SZENDRÓ Z. (1988). lnvestigations on frequent kindlings with a view to breeding. In : Proc. of 4th World Rabbit Congress, Budapest, Hungary, 10-14.
YAMANI K.A., DAADER A.H., ASKER A.A. (1991). Non genetic factors affecting rabbit production in Egypt. Options Méditérranéennes, Série Séminaires, 17, 159-172.
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