Effect of Wattle Trait on Body Sizes and Scrotal Dimensions of Traditionally Reared West African Dwarf (WAD) Bucks in the Derived Savannah Environment

Iranian Journal of Applied Animal Science

مقاله 11، دوره 2، شماره 1، خرداد 2012، صفحه 69-72   

نویسندگان

T.A. Adedeji^{* 1}؛ M.O. Ozoje²؛ T.A. Otunta¹؛ L.O. Ojedapo¹؛ T.K. Ojediran¹؛ A.O. Ige¹

¹Department of Animal Production and Health, LadokeAkintola University of Technology, Ogbomoso, P.M.B, 4000, Nigeria

²Department of Animal Breeding and Genetics, University of Agriculture, Abeokuta, P.M.B, 4000,Nigeria

چکیده

This study was focused on the effect of wattle trait on body sizes and scrotal dimensions of traditionally reared WAD bucks in the derived savannah environment. Data were collected from 153 bucks ranging from 4 months to 2 years of age and this included, scrotal length, scrotal circumference, body weight, height at withers, body length and chest girth. Parameters for wattle traits included, wattle incidence (presence or absence), wattle shape (oval or cylindrical) and wattle position (under or beside neck). Data obtained were adjusted for age effect and subjected to Analysis of variance. There were significant effects (P<0.05) of wattle incidence, wattle shape and wattle location on body weight, body length, chest girth and scrotal length of WAD bucks. In addition, height at wither  was only affected (P<0.05) by wattle shape. Cylindrically shaped wattled bucks whose wattles were located under the neck had more of body weight, body length, chest girth and scrotal length. Meanwhile, the height of goats whose wattles were cylindrical were more than those with oval shaped. Therefore, selection based on wattle traits can be employed as an indirect and affordable means of determining higher body sizes and fertility in WAD bucks.

کلیدواژه‌ها

body sizes؛ bucks؛ scrotal dimensions؛ WAD؛ wattle

مراجع

Adedeji T.A. (2009). Pleiotropic effects of coat colour and wattle genes on the adaptive potentials of West African Dwarf goats. Ph.D Thesis. University of Agriculture, Abeokuta, Nigeria.
Adejuwon J.O. (1983). Soil Atrophic of Oyo state of Nigeria. Heinemann Nigeria Publ., Ibadan.
Casu S., Boyazoglu J.G. and Lauvergne J.J. (1970). The Inheritance of wattles in the Sardinian breed of sheep. Anal. Genet. Sel. Anim. 2, 249-261.
Kafi M., Safdarian M. and Hashemi M. (2004). Seasonal variation in semen characteristics, scrotal circumference and libido of Persian Karakul rams. Small Rumin. Res. 53,133-139.
Katongole J.B.D., Sebolai B. and Madimabe M.J. (1996). Morphological characterization of the Tswana goat. In: Small ruminant research and development in Africa. S.H.B. Lebbie and E.Kagwini. Pp. 5-9 in Proc. 3^rd Biennial Conference of the African Small Ruminant Research Network. UICC, Kampla, Uganda.
Keeton L.L., Green R.D., Golden B.L. and AndersonK.J. (1996). Estimation of variance components and prediction of breeding values for scrotal circumference and weaning weight in Limousin cattle. J. Anim. Sci. 74, 31-36.
Odubote I.K. (1994). Influence of qualitative traits on the performance of West African Dwarf goats. Nigerian J. Anim. Prod. 21, 25-28.
Oguntoyinbo J.S. (1988). Climate. Pp. 78 inGeography of Nigeria Development. J.S. Oguntoyinbo and M. Filani, Eds. Heinemann Nigeria Ltd, Ibadan.
Osinowo O.A., Buvanendram V. and Koning N.L. (1988). A study of coat type, pigmentation and wattle incidence in Yankasa sheep and their effects on fertility and weaning weight. In Proc. 13^th Annual Conference of the Nigerian. Soc. Anim.Prod. University of Calabar, Nigeria.
Osinowo O.A., Molokwu E.C.I. and Osori D.I.K. (1981). Growth and testicular development in Bunaji bulls. J. Anim. Prod. Res. 1, 55-67.
Osinowo O.A., Buvanendran V. and Koining M.L. (1990). The Occurrence and inheritance of Wattles in Yankasa sheep. Nigerian. J. Anim. Prod. 17(1/2), 63-64.
Ozoje M.O. (2002). Incidence and relative effects of qualitative traits in West African Dwarf goats. Small Rumin. Res. 43, 97-100.
Ozoje M.O. and Mgbere O.O. (2002). Coat pigmentation effects in West Africa Dwarf goats: Live weights and body dimensions.Nigerian. J. Anim. Prod. 29(1), 5-10.
Palasz A.T., Cates W.F., Barth A.B. and Mapletoft R.J. (1994). The relationship between scrotal circumference and quantitative testicular traits in yearling beef bulls. Theriogenology. 42, 715-726.
Peter J.C. and Lesile B. (1980). Current therapy. Pp. 330-335, in: Theriognelogy. W.B. Morrow and Co. Saunders. Eds. Philadelphia.
Robert A.V. (1994). Raising Healthy Goats under Primitive Conditions, Overview of General Information, Pp. 12-18. Christian Veterinary Mission, Washington, U.S.A.
SAS. (2003). Statistical Analysis System. SAS stat. Version 9. SAS institute Inc. Gary NC U.S.A.
Shongjia L., Xiangmo L., Gangyl X. and Shenov C. (1992). Relationship between physical traits, litter size and milk yield in Saanen, Guanzhong and Crossbred goats. Pp. 83 in Proc. 5^th Int. Conf. Goats. New Delhi.