Effects of crossbred ewe genotype and ram genotype on ewe prolificacy, lamb viability and lamb output in the lowland sector

Journal of Agricultural Science

Volumn 139, Issue 2, 2002, Pages 169-181

  Dawson, L E R ^a   Carson, A F ^a,b  

^a AGRI FOOD AND BIOSCIENCES INSTITUTE   (United Kingdom)

^b QUEEN'S UNIVERSITY BELFAST   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

BREEDING; GENOTYPE; GROWTH; LIVESTOCK;

UNITED KINGDOM;

ANIMALIA; LAMB; OVIS; OVIS ARIES;

EID: 0036768834     PISSN: 00218596     EISSN: None     Source Type: Journal    
DOI: 10.1017/S0021859602002381     Document Type: Article

References (25)

1. BICHARD, M., YOUNIS, A. A., FORREST, P. A. & CUMBERLAND, P. H. (1974). Analysis of production records from a lowland sheep flock. 4. Factors influencing the incidence of successful pregnancy in young females. Animal Production 19, 177-191.
2. CARSON, A. F., IRWIN, D. & KILPATRICK, D. J. (2001). A comparison of Scottish Blackface and Cheviot ewes and five sire breeds in terms of lamb output at weaning in hill sheep systems. Journal of Agricultural Science, Cambridge 137, 221-233.
3. CARSON, A. F., MCCLINTON, L. W. & STEEN, R. W. J. (1999). Effects of Texel or Rouge de l'Ouest genes in lowland ewes and rams on ewe prolificacy, lamb viability and weaned lamb output. Animal Science 68, 69-78.
4. DAWSON, L. E. R. & CARSON, A. F. (2002). Effects of crossbred ewe genotype and ram genotype on lamb carcass characteristics from the lowland sheep flock. Journal of Agricultural Science, Cambridge 139, 183-194.
5. DEPARTMENT OF AGRICULTURE FOR NORTHERN IRELAND (DANI) (1996). An economic analysis of ewe flock performance in Northern Ireland 1994. Studies in Agricultural and Food Economics. Belfast: Department of Agriculture.
6. DRÝMUNDSSON, Ó. R. (1983). The influence of environmental factors on the attainment of puberty in ewe lambs. In Sheep Production (Ed. W. Haresign), pp. 393-408. London: Butterworths.
7. FOGARTY, M. & TURNER, M. (1994). Lowland sheep 1994: Production Economics and Management. University of Exeter: Agricultural Economics Unit.
8. HANRAHAN, J. P. (1989). Evaluation of crossbred ewe types. Food and Farm Research 20, 28-30.
9. HANRAHAN, J. P. (1994). Evaluation of crossbred ewe types. Irish Grassland and Animal Production Association, 106-113.
10. HANRAHAN, J. P. (2000). Genetic and non-genetic factors affecting lamb growth and carcass quality. Teagasc Project Report 2551.
11. JOHNSTON, S. D., STEEN, R. W. J., KILPATRICK, D. J., LOWE, D. E. & CHESTNUTT, D. M. B. (1999). A comparison of sires of Suffolk and Dutch Texel breeds and ewes of Greyface, Suffolk Cheviot and Dutch Texel breeds in terms of food intake, prolificacy and lamb growth rates. Animal Science 68, 567-575.
12. KEANE, M. G. (1974). Effect of bodyweight on attainment of puberty and reproductive performance in Suffolk X ewe lambs. Irish Journal of Agricultural Research 13, 263-274.
13. LATIF, M. G. A. & OWEN, E. (1979). Comparison of Texel- and Suffolk-sired lambs out of Finnish Landrace x Dorset Horn ewes under grazing conditions. Journal of Agricultural Science, Cambridge 93, 235-239.
14. LEWIS, R. M., SIMM, G., DINGWALL, W. S. & MURPHY, S. V. (1996). Selection for lean growth in terminal sire sheep to produce leaner crossbred progeny. Animal Science 63, 133-142.
15. LEYMASTER, K. A. & JENKINS, T. G. (1993). Comparison of Texel- and Suffolk-sired crossbred lambs for survival, growth and compositional traits. Journal of Animal Science 71, 859-869.
16. MANN, T. J. L., SMITH, C., KING, J. W. B., NICHOLSON, D. & SALES, D. I. (1984). Comparison of crossbred ewes from five crossing sire breeds. Animal Production 39, 241-249.
17. MEAT AND LIVESTOCK COMMISSION (1998). Sheep Year Book. Milton Keynes: Meat and Livestock Commission.
18. MEAT AND LIVESTOCK COMMISSION (2000). Sheep Year Book. Milton Keynes: Meat and Livestock Commission.
19. MORE O'FERRALL, G. J. & TIMON, V. M. (1975). A comparison of sheep breeds and crosses for ewe productivity. Irish Journal of Agricultural Research 14, 285-296.
20. NUMERICAL ALGORITHMS GROUP (1994). Genstat 5 Release 3 Reference Manual. Oxford: Oxford Scientific Publications, Clarendon Press.
21. RUSSEL, A. J. F., DONEY, J. M. & GUNN, R. G. (1969). Subjective assessment of body fat in live sheep. Journal of Agricultural Science, Cambridge 72, 451-454.
22. SIMM, G. & MURPHY, S. V. (1996). The effects of selection for lean growth in Suffolk sires on the saleable meat yield of their crossbred progeny. Animal Science 62, 255-263.
23. WOLF, B. T., SMITH, C. & SALES, D. I. (1980). Growth and carcass composition in the crossbred progeny of six terminal sire breeds of sheep. Animal Production 31, 307-313.
24. WOOLLIAMS, C. & WEINER, G. (1983). A note on the growth and food consumption of crossbred lambs of five sire breeds. Animal Production 37, 137-140.
25. WOOLLIAMS, C., WIENER, G. & MACLEOD, N. S. M. (1983). The effects of breed, breeding system and other factors on lamb mortality. 2. Factors influencing the incidence of delayed birth, dystocia, congenital defects and miscellaneous causes of early death. Journal of Agricultural Science, Cambridge 100, 553-561.