Genetic and phenotypic parameters for early career performance traits and age at first qualifying start (AFQ), passed qualifying start (APQ), and age first race (AFR) were estimated for Finnish Standardised trotters using REML with an animal model. A high genetic correlation was found to exist between the performance traits. The genetic correlation between age (AFQ, APQ, AFR) and performance traits was also high. The variation in number of starts, AFQ, APQ and AFR is attributable mainly to environmental factors, as indicated by their low h2-estimates.

M. T Saastamoinen, A. Nylander

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 458–461, 1994
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