A simple method for weighted bending of genetic (co)variance matrices

Journal of Dairy Science

Volumn 86, Issue 2, 2003, Pages 677-679

  Jorjani, H ^a   Klei, L ^b   Emanuelson, U ^a  

^a SWEDISH UNIVERSITY OF AGRICULTURAL SCIENCES   (Sweden)

^b Holstein Association USA Inc   (United States)

Author keywords

Covariance matrices; Genetic correlation matrix; Weighted bending

Indexed keywords

ANIMALIA;

ALGORITHM; ANIMAL; ARTICLE; BREEDING; CATTLE; FEMALE; GENETIC SELECTION; GENETICS; MALE; MATHEMATICS; METHODOLOGY; QUANTITATIVE TRAIT LOCUS;

ALGORITHMS; ANIMALS; BREEDING; CATTLE; FEMALE; MALE; MATHEMATICS; QUANTITATIVE TRAIT LOCI; SELECTION (GENETICS);

EID: 0037838909     PISSN: 00220302     EISSN: None     Source Type: Journal    
DOI: 10.3168/jds.S0022-0302(03)73646-7     Document Type: Article

References (8)

1. Árnason, T. 1984. Genetic studies on conformation and performance of Icelandic Toelter Horses. II. Construction of Multi-trait selection indices and modification of covariance matrices by the "bending" method. Acta Agric. Scand. 34:428-439.
2. Essl, A. 1991. Choice of an appropriate bending factor using prior knowledge of the parameters. J. Anim. Breed. Genet. 108:89-101.
3. Hayes, J. F., and W. G. Hill. 1981. Modification of estimates of parameters in the construction of genetic selection indices ('bending'). Biometrics 37:483-493.
4. Henshall, J. M., and K. Meyer. 2002. "PDMATRIX" - Programs to make matrices positive definite. Proceedings of the 7th World Congress on Genetics Applied to Livestock Production. Communication No. 28-12, Vol. 33:753-754.
5. Jorjani, H., L. Klei, and U. Emanuelson. 2002. Combining disparately estimates of genetic correlations. Interbull Bull. 29:1-3
6. Klei, L., E. J. Pollak, and R. L. Quaas. 1988. Genetic and environmental parameters associated with linearized type appraisal scores. J. Dairy Sci. 71:2744-2752.
7. Meuwissen, T. H. E., and E. Kanis. 1988. Application of bending theory in a pig-breeding situation. Livest. Prod. Sci. 18:85-91.
8. Meyer, K., and Hill, W. G. 1983. A note on the effects of sampling errors on the accuracy of genetic selection indices. J. Anim. Breed. Genet. 100:27-32.