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Studies on the genetics of trotting performance in dutch trotters. II. – A method for the breeding value estimation of trotter stallions

1976; BioMed Central; Volume: 8; Issue: 4 Linguagem: Inglês

10.1186/1297-9686-8-4-511

1297-9686

D Minkema,

Genetic Mapping and Diversity in Plants and Animals

In order to select Trotter stallions on the basis of the performance of their progeny, an index has been developed.This index is based on the earnings of progeny, being in various stages of their trotting career.The earnings are corrected for annual fluctuations and for sex differences.The mean of each age class of progeny of a given stallion is corrected for the mean performance of the dams, by taking into account the regression of progeny performance on dam's performance.For each stallion the corrected mean earnings of progeny of the various age classes are joined.For this purpose weighting factors are developed according to the selection index theory, taking into account the number of progeny in the various age classes.1.