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Use of random regression model as an alternative for multibreed relationship matrix



I. Strandén, MTT Agrifood Research Finland, Biotechnology and Food Research, Biometrical Genetics, FIN-31600 Jokioinen,

Finland. Tel: +358 29 531 7773;

Fax: +358 20 772 040;



A random regression model is presented as an approximation for multibreed variance model. The approximation is derived using the splitted multibreed model where the single breeding value is split to the breed specific and their segregation terms. The random regression model allows extending the multibreed information easily to genomic data models. We present the approach by a simple example.