Analysis of the genetic relationship between litter size and weight traits in Segureña sheep

Canadian Journal of Animal Science

Volumn 77, Issue 1, 1997, Pages 17-21

  Analla, M ^a,b   Munoz Serrano A ^a   Serradilla, J M ^a  

^a UNIVERSITY OF CÓRDOBA   (Spain)

^b FACULTÉ DES SCIENCES   (Morocco)

Author keywords

Correlation; Heritability; Litter size; Sheep; Weight

Indexed keywords

ANIMALIA; OVIS ARIES;

EID: 0039176277     PISSN: 00083984     EISSN: None     Source Type: Journal    
DOI: 10.4141/A95-137     Document Type: Article

References (22)

1. Analla, M., Muñoz-Serrano, A., Cruz, J. M. and Serradilla, J. M. 1995. Estimation of genetic parameters of growth in Segureña lambs. J. Anim. Breed. Genet. 112: 183-190.
2. Bradford, G. E., Sakul, H., Neira, R., Famula, T. R., Dally, M. R. and Finley, C. M. 1994. Reproduction in sheep selected for weaning weight or litter size in range environment. Proc. 5th World Congr. on Genetics Applied to Livestock Production. 18: 95-98.
3. Canadian Council on Animal Care. 1993. Guide to the care and use of experimental animals. Volume 1. 2nd ed. Canadian Council on Animal Care, Ottawa, ON.
4. Clarke, S. E. and Hohenboken, W. D. 1983. Estimation of repeatability, heritability and breed differences for lamb production. J. Anim. Sci. 56: 309-315.
5. Cruz, M. and Cruz, J. M. 1992. Caracteres reproductivos en ovino Segureño. [Reproductive traits in Segureña sheep breed.] Ovis 20: 35-49.
6. Davis, G. P. and Kinghorn, B. P. 1986. Genetic and phenotypic parameters for growth, wool production and reproduction traits in a line of Merinos sheep. Proc. 3rd World Congr. on Genetics Applied to Livestock Production. 11: 145-150.
7. Falagán, A. 1992. El cordero Segureño: crecimiento y características carniceras. [The Segureña lamb: growth and meat characteristics.] Ovis 20: 63-70.
8. Gabiña, D. 1989. Improvement of reproductive performance of Rasa Aragonesa flocks in frequent lambing systems. II. Repeatability and heritability of sexual precocity, fertility and litter size. Selection strategies. Livest. Prod. Sci. 22: 87-98.
9. Gianola, D. and Foulley, J. L. 1983. Sire evaluation for ordered categorical data with a threshold model. Génét. Sél. Evol. 15: 201-224.
10. Harville, D. A. and Mee, R. W. 1984. A mixed model procedure for analyzing ordered categorical data. Biometrics 40: 393-408.
11. Jensen, J. 1986. Sire evaluation for type traits with linear and nonlinear procedures. Livest. Prod. Sci. 15: 165-171.
12. Jorgensen, J. N. 1994. Estimation of genetic parameters for litter size in sheep using nonlinear method. Acta Agric. Scand. 44: 8-11.
13. Meat and Livestock Commission. 1988. Feeding the ewe. 2nd ed. Sheep Improvement Services. Meat and Livestock Commission, Bletchley, UK.
14. Meijering, A. and Gianola, D. 1985. Linear versus nonlinear methods of sire evaluation for categorical traits: a simulation study. Génét. Sél. Evol. 17: 115-132.
15. Meyer, K. 1993. DFREML version 2.1 user's notes.
16. Olesen, I., Pérez-Enciso, M., Gianola, D. and Thomas, D. L. 1994. A comparison of normal and nonnormal mixed models for number of lambs born in Norwegian sheep. J. Anim. Sci. 72: 1166-1173.
17. Renand, G., Janss, L. L. G. and Gaillard, J. 1990. Sire evaluation for direct effects on dystocia by linear and threshold models. Proc. 4th World Congr. on Genetics Applied to Livestock Production. 13: 465-467.
18. Sakul, H., Bradford, G. E., Dally, M. R., Famula, T. R. and Finley, C. M. 1994. Growth rate in sheep selected for weaning weight or litter size in range environment. Proc. 5th World Congr. on Genetics Applied to Livestock Production. 18: 59-62.
19. Thompson, J. M. 1990. Correlated responses to selection for growth and leanness in sheep. Proc. 4th World Congr. on Genetics Applied to Livestock Production. 16: 266-275.
20. Waldron, D. F. and Thomas, D. L. 1992a. Increased litter size in Rambouillet sheep. I. Estimation of genetic parameters. J. Anim. Sci. 70: 3333-3344.
21. Waldron, D. F. and Thomas, D. L. 1992b. Increased litter size in Rambouillet sheep. II. Expected response from alternative selection criteria. J. Anim. Sci. 70: 3345-3350.
22. Weller, J. I., Mistal, I. and Gianola, D. 1988. Genetic analysis of dystocia and calf mortality in Israeli-Holstein by threshold and linear models. J. Dairy Sci. 71: 2491-2501.