본문 바로가기
HOME> 논문 > 논문 검색상세

논문 상세정보

Asian-Australasian journal of animal sciences v.18 no.2, 2005년, pp.151 - 157   피인용횟수: 2

The Effect of Non-genetic Factors on Birth Weight and Weaning Weight in Three Sheep Breeds of Zimbabwe

Assan, N.    (Matopos Research Station   ); Makuza, S.M.    (Department of Animal Science, University of Zimbabwe  );
  • 초록

    Sheep production is affected by genetic and non-genetic factors. A knowledge of these factors is essential for efficient management and for the accurate estimation of breeding values. The objective of this study was to establish the non-genetic factors which affect birth weight and weaning weight in Dorper, Mutton Merino and indigenous Sabi sheep breeds. A total of 2,625 birth and weaning weight records from Grasslands Research Station collected from 1991 through 1993, were used. The records were collected from indigenous Sabi (939), Dorper (807) and Mutton Merino (898) sheep. A mixed classification model containing the fixed effects of year, birth status and sex was used for identification of non-genetic factors. Sire within breed was included as a random effect. Two factor interactions and three factor interactions were important in indigenous Sabi, Mutton Merino and Dorper sheep. The mean birth weights were 4.37 ${\pm}$ 0.04 kg, 4.62 ${\pm}$ 0.04 kg and 3.29 ${\pm}$ 0.04 kg for Mutton Merino, Dorper and Sabi sheep, respectively. Sire had significant effects (p ${\pm}$ 0.05 kg) were 0.23 kg heavier than twins (3.07 ${\pm}$ 0.05 kg), in Mutton Merino lambs born as singles (3.99 ${\pm}$ 0.08 kg) were 0.07 kg heavier than twins (3.92 ${\pm}$ 0.08 kg) and in Dorper lambs born as singles (4.41 ${\pm}$ 0.04 kg) were 0.02 kg heavier than twins (4.39 ${\pm}$ 0.04 kg). On average males were heavier than females (p ${\pm}$ 0.04 kg vs. 3.05 ${\pm}$ 0.07 kg) in indigenous Sabi, 4.73 ${\pm}$ 0.03 kg vs. 4.08 ${\pm}$ 0.05 in Dorper and 4.26 ${\pm}$ 0.07 kg vs. 3.66 ${\pm}$ 0.09 kg in Mutton Merino sheep. Two way factor interactions of sire*year, year*sex and sex*birth status had significant effects (p ${\pm}$ 0.31 kg, 18.19 ${\pm}$ 0.28 kg and 14.39 ${\pm}$ 0.28 kg for Mutton Merino, Dorper and Indigenous Sabi sheep, respectively. Effects of sire and sire*year were non significant on weaning weight in Dorper and Mutton Merino while year, sex and sex*year interaction had significant effects (p ${\pm}$ 0.46 kg, 18.68 ${\pm}$ 0.19 kg, 14.14 ${\pm}$ 0.15 kg for males and 16.64 ${\pm}$ 0.60 kg, 16.41 ${\pm}$ 0.31 kg, 12.64 ${\pm}$ 0.32 kg for females in Mutton Merino, Dorper and Indigenous Sabi sheep. Lambs born as singles were significantly heavier at weaning than twins, 0.05 kg, 0.06 kg and 0.78 kg for Mutton Merino, Dorper and Indigenous Sabi sheep, respectively. Effect of tupping weight was highly significant on weaning weight. The three way factor interaction year*sex*birth status had a significant effect (p


  • 주제어

    Non-genetic Factors .   Birth Weight .   Weaning Weight .   Sheep .   Zimbabwe.  

  • 참고문헌 (27)

    1. Atkins, K. D. 1980. Non-genetic factors affecting body weight in sheep. Australian Journal of Experimental Agriculture and Animal Husbandry 20:272-279 
    2. Dickerson, G. E. 1978. Animal size and efficiency: Basic Concepts. Animal Prod. 27:36 
    3. Dingwall, W. S., J. J. Robinson and C. Fraser. 1981. Foetal growth during early pregnancy in prolific ewes. Anim. Prod. 32:364 (Abstr) 
    4. Kennan, T. C. D. 1979. Rhodesia Agricultural Journal 76:53-63. 
    5. Meyer, K. 1988. Restricted Maximum Likelihood to estimate variance components for animal models with several random effects using a derivative-free algorithm, Selection, Evolution (23). 
    6. Mukandan, G. and T. G. Rajagopalan. 1971. An evaluation of dam on the frequency of multiple births in Malabari goats. Kerala. J. of Veterinary Sci. 2(2):95-98 (ABA 47, 4894). 
    7. Olson, W. L., G. E. Dickerson and H. A. Glimp. 1976. Selection criteria for intensive market lamb production: Growth traits. J. Anim. Sci. 43:78-89. 
    8. Shrestha, J. N. B., W. E. Rempel and W. J. Boyan. 1974. Evalution of purebred ewe and lamb productivity. J. Anim. Sci. 39:966 (Abstr). 
    9. Manyuchi, B., H. P. R. Tawonezvi and R. M. Chiwara. 1990. Breed and environmental Influences on weaner lamb production in Zimbabwe Tropical Animal Health and Production 22:35-38. 
    10. Buvanendran, V., S. M. Makuza and P. Chironga. 1992. Phenotypic and genetic parameters of weaning traits in Dorper sheep in Zimbabwe. Small Ruminant Res. 7:369-374 
    11. Galal, E. S. E., E. A. Aboul-Naga, E. A. Elatawil and E. S. Kishin. 1972. Estimates of Combining Abilities and Maternal Influence in Crosses between Merino, Ossimi and Barkie Sheep. Anim. Prod. 15:47-52 
    12. Central Statistical Office (CSO) 1999. Agriculture and Livestock Survey in Communal Lands. Central Statistical Office, Causeway, Harare, Zimbabwe 
    13. Khombe, C. T. 1985. Environmental Factors affecting the growth and viability of crossbred sheep and goats on range in Zimbabwe. In: Small Ruminants in African Agriculture. (Ed. R. T. Wilson and D. Bourzat). International Livestock Centre for Africa (ILCA), Addis Ababa, Ethiopia pp. 46-52. 
    14. Donald, H. P. and W. S. Russel 1970. The relationship between liveweight of ewe at mating and weight of newborn lamb. Anim. Prod. 12:273-280 
    15. Matika, O. 1995. Sheep in a Semi-Arid Environment in Zimbabwe: Performance levels and genetic parameters. Matopos Research Station, Bulawayo, Zimbabwe (unpublished). 
    16. SAS. 1996. SAS Guide for Personal computers, version 6.12. SAS inst., Inc., Cary, NC. USA. 
    17. Van Wyk, J. B., G. J. Erasmus and K. V. Konstantinov. 1992. Nongenetic factors influencing early growth traits in the Elsenburg Dormer sheep stud. S. Afric. J. Anim. 23:67-70. 
    18. Chang, T. S. and A. L. Rae. 1972. The genetic basis of growth, reproduction and maternal environment in Romney ewes. II Genetic co variation between hogget characters, fertility and environment of the ewe. Aust. J. Agric. Res. 23:149-165 
    19. Mangus, W. L. and J. S. Brink. 1971. Relationship between direct and maternal effect on growth in Herefords. I. Environmental factors during preweaning growth. J. Anim. Sci. 32:17-25. 
    20. Olivier, J. J., G. J. Delport, G. J. Erasmus and T. J. Eksteen. 1987. Linear type scoring in Merino sheep. Karoo Agric 3(9):1. 
    21. Buitendag, G. 1986. Commercial Agriculture in Zimbabwe 1986/7. Annual Report (Ed. M. Van Hoffen) Mardon Printers, Harare. Zimbabwe 
    22. Donkin, D. J. 1973. Sheep breeds in Rhodesia. In: Sheep Handbook. Sheep Producers Association, Harare, Zimbabwe. pp. 2.1-8 
    23. Khan, B. U. and K. L. Sohani. 1983. Preweaning body weights and linear body measurements in Jamunapari goats under semi- arid farm conditions. Ind. J. Anim. Sci. 53:835-840. 
    24. Trail, J. C. and G. D. Sacker. 1966. Production records of lambs from East Africa Blackheaded ewes and Dorset Horn rams. East African Agricultural and Forestry Journal. 
    25. Cloete, S. W. P., G. J. Delport, G. J. Erasmus, J. J. Olivier, H. J. Heydenrych and Elizabeth du Toit. 1992. Environmental and genetic trends in clean fleece mass, live mass and fibre diameter in selection experiment for increased clean fleece mass in South Africa Merino sheep. S. Afr. J. Anim. Sci. 22:50-57 
    26. Hulet, C. V., W. C. Foote and D. A. Price. 1969. Factors affecting growth of ovine fetuses during early gestation. Anim. Prod. 11:219-223 
    27. Wilson, R. T. 1986. Livestock production in Central Mali: Long term studies on cattle and small ruminants in the agropastoral system Research Report 14. ILCA, Addis Ababa, Ethiopia. 
  • 이 논문을 인용한 문헌 (2)

    1. 2007. "" Asian-Australasian journal of animal sciences, 20(1): 7~11     
    2. 2008. "" Asian-Australasian journal of animal sciences, 21(3): 371~375     

 활용도 분석

  • 상세보기

    amChart 영역
  • 원문보기

    amChart 영역

원문보기

무료다운로드
유료다운로드
  • 원문이 없습니다.

유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.

원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.

NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.

이 논문과 함께 출판된 논문 + 더보기