Adjusted test day milk yields from 19,688 first parity, Friesian heifers were analyzed to determine if either paternal and maternal gametic imprinting were important sources of variation in Australian dairy cattle. Paternal imprinting accounted for 1% of the variance in adjusted milk yield, while maternal imprinting accounted for .5%. Neither additive nor residual variances were greatly affected by including gametic imprinting in the model. Heritability estimates from analyses without gametic imprinting and with sire or maternal imprinting were .283, .262, and .276, respectively. These results suggest gametic imprinting does not cause variation in milk yield in Australia.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 23: Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs., , 355–358, 1998
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