Genetic parameters among weight, prolificacy, and wool traits of Columbia, Polypay, Rambouillet, and Targhee sheep

Journal of Animal Science

Volumn 78, Issue 4, 2000, Pages 846-858

  Bromley, C M ^a,d   Snowder, G D ^b   Van Vleck, L D ^c  

^a UNIVERSITY OF NEBRASKA LINCOLN   (United States)

^b US Sheep Experiment Station   (United States)

^c U S MEAT ANIMAL RESEARCH CENTER   (United States)

^d NATIONAL CANCER INSTITUTE   (United States)

Author keywords

Genetic correlation; Growth; Heritability; Reproduction

Indexed keywords

AGE; ANIMAL; ARTICLE; BIOLOGICAL MODEL; BIRTH WEIGHT; BODY WEIGHT; CLASSIFICATION; GENETICS; LITTER SIZE; SHEEP; WEANING; WOOL;

AGE FACTORS; ANIMALS; BIRTH WEIGHT; BODY WEIGHT; LITTER SIZE; MODELS, GENETIC; SHEEP; WEANING; WOOL;

EID: 0034166644     PISSN: 00218812     EISSN: None     Source Type: Journal    
DOI: 10.2527/2000.784846x     Document Type: Article

References (37)

1. Al-Shorepy, S. A., and D. R. Notter. 1996. Genetic variation for ewe reproduction, lamb growth, and lamb scrotal circumference in a fall-lambing sheep flock. J. Anim. Sci. 74:1490-1498.
2. Boldman, K. G., L. A. Kriese, S. D. Kachman, C. P. Van Tassell, and L. D. Van Vleck. 1995. A manual for the use of MTDFREML (Draft). Agric. Research Ser., USDA, Clay Center, NE.
3. Brash, L. D., N. M. Fogarty, S. A. Barwick, and A. R. Gilmour. 1994. Genetic parameters for Australian maternal and dual purpose meat sheep breeds. I. Live weight, wool production and reproduction in Border Leicester and related types. Aust. J. of Agric. Res. 45(2):459-468.
4. Cloete, S.W.P., and H. J. Heydenrych. 1987. Genetic parameters for reproductive rate in the Tygerhoek Merino flock. 2. Genetic correlations with wool and live mass traits. S. Afr. Tydskr. Veek. 17:8-13.
5. Dickerson, G. E. 1970. Efficiency of animal production - Molding the biological components. J. Anim. Sci. 30:849-859.
6. Ercanbrack, S. K., and A. D. Knight. 1998. Responses to various selection protocols for lamb production in Rambouillet, Targhee, Columbia, and Polypay sheep. J. Anim. Sci. 76:1311-1325.
7. Ercanbrack, S. K., and D. A. Price. 1977. Selecting for weight and rate of gain in inbred lambs. J. Anim. Sci. 44:532-541.
8. Fogarty, N. M. 1995. Genetic parameters for liveweight, fat and muscle measurements, wool production and reproduction in sheep: A review. Anim. Breed. Abstracts 63:143.
9. Graser, H-U., S. P. Smith, and B. Tier. 1987. A derivative-free approach for estimating variance components in animal models by restricted maximum likelihood. J. Anim. Sci. 64:1362-1370.
10. Harrington, R. B., D. G. Brothers, and J. V. Whiteman. 1962. Heritability of gain of lambs measured at different times and by different methods. J. Anim. Sci. 21:78-81.
11. Iman, N.Y., C. L. Johnson, W. C. Russell, and R. H. Stobart. 1992. Estimation of genetic parameters for wool fiber diameter measures. J. Anim. Sci. 70:1110-1115.
12. Kennedy, J. P. 1967. Genetic and phenotypic relationships between fertility and wool production in two-year old Merino ewes. Aust. J. Agric. Res. 18:515-519.
13. Lasley, J. F. 1978. Genetics of livestock improvement. (3rd Ed.). Prentice-Hall, Inc., Englewood Cliffs, NJ.
14. María, G. A., K. G. Boldman, and L. D. Van Vleck. 1993. Estimates of variances due to direct and maternal effects for growth traits of Romanov sheep. J. Anim. Sci. 71:845-849.
15. Martin, T. G., D. I. Sales, C. Smith, and D. Nicholson. 1980. Phenotypic and genetic parameters for lamb weights in a synthetic line of sheep. Anim. Prod. 30:261-269.
16. Meyer, K. 1992. Variance components due to direct and maternal genetic effects for growth traits of Australian beef cattle. Livest. Prod. Sci. 31:179-204.
17. Näsholm, A., and Ö. Danell. 1994. Maternal genetic effects on lamb weights. In: Proc. 5th World Congr. Genet. Appl. Livestock Prod., 18:163-166.
18. Näsholm, A., and Ö. Danell. 1996. Genetic relationships of lamb weight, maternal ability, and mature ewe weight in Swedish finewool sheep. J. Anim. Sci. 74:329-339.
19. Nawaz, M., H. H. Meyer, and D. R. Thomas. 1992. Performance of Polypay, Coopworth, and crossbred ewes: II. Survival and cumulative lamb and wool production over 4 years. J. Anim. Sci. 70:70-77.
20. O'Ferrall, G. J. 1976. Phenotypic and genetic parameters of productivity in Galway ewes. Anim. Prod. 23:295-297.
21. Okut, H., C. M. Bromley, L. D. Van Vleck, and G. D. Snowder. 1999. Genotypic expression at different ages: I. Prolificacy traits of sheep. J. Anim. Sci. 77:2357-2365.
22. Robison, O. W. 1972. The role of maternal genetic effects in animal breeding V: Maternal effects in swine. J. Anim. Sci. 35:1303-1315.
23. Robison, O. W. 1981. The influence of maternal genetic effects on the efficiency of selection - A review. Livest. Prod. Sci. 8:121-137.
24. Saboulard, M., W. C. Russell, and M. L. Riley. 1995. Selection for lambing rate and clean fleece weight in sheep. J. Anim. Sci. 73:3195-3198.
25. Sakul, H., G. E. Bradford, M. R. Dally, T. R. Famula, and C. M. Finley. 1994. Growth in sheep selected for weaning weight or litter size in a range environment. Proc. 5th World Congr. Genet. Appl. Livestock Prod. 18:59-62.
26. Sakul, H., M. Dally, and E. Bradford. 1993. Evaluation of Australian Merino and U. S. sheep breeds for growth and carcass traits. J. Anim. Sci. 71:363-368.
27. Shelton, M. 1998. A review of the nutritional efficiency of fiber production in goats and sheep and the relationship of fiber and meat production. Sheep and Goat Research J. 14:214-223.
28. Shelton, M., and J. W. Menzies. 1968. Genetic parameters of some performance characteristics of range fine-wool sheep. J. Anim. Sci. 27:1219-1265.
29. Snowder, G. D., and H. A. Glimp. 1991. Influence of breed, number of suckling lambs, and stage of lactation on ewe milk production and lamb growth under range conditions. J. Anim. Sci. 69:923-930.
30. Swalve, H. H. 1993. Estimation of direct and maternal (co)variance components for growth traits in Australian Simmental beef cattle. J. Anim. Breed. Genet. 110:241-252.
31. Thorsteinsson, S. S., S. Thorgeirsson, and O. B. Eisnatsdottir. 1994. Precision of predicting lean and fat weight from live ultrasonic measurements and genetic parameters for these measurements. Proc. 5th World Congr. Genet. Appl. Livestock Prod. 18:11-14.
32. Thrift, F. A., J. V. Whiteman, and D. D. Kratzer. 1973. Genetic analysis of preweaning and postweaning lamb growth traits. J. Anim. Sci. 36:640-643.
33. Tosh, J. J., and R. A. Kemp. 1994. Estimation of variance components for lamb weights in three sheep populations. J. Anim. Sci. 72:1184-1190.
34. Van Zyl, C. M. 1998. Estimation of genetic parameters for production traits of corn and dual purpose sheep. Ph.D. thesis, University of Nebraska, Lincoln.
35. Vogt, D. W., R. C. Carter, and W. H. McClure. 1967. Genetic and phenotypic parameter estimates involving economically important traits in sheep. J. Anim. Sci. 26:1232-1238.
36. Wang, C. T., and G. E. Dickerson. 1991. Simulated effects of reproductive performance on life-cycle efficiency of lamb and wool production at three lambing intervals. J. Anim. Sci. 69:4338-4347.
37. Wolf, B. T., C. Smith, J. W. B. King, and D. Nicholson. 1981. Genetic parameters of growth and carcass composition in crossbred lambs. Anim. Prod. 32:1-7.