Data on 717 first lactation cows at the Langhill Dairy Herd in Edinburgh, Scotland, were used to investigate the presence of a variance component attributable to cytoplasmic lineage. The cows , all Holstein Friesian, calved between 1979 and 1996 and were part of a long term selection experiment . Analysis was performed using an animal model and either fitting lineage, i.e. cow family, as a random variable or not including it. The analysis failed to provide any evidence of a significant variance component that could be attributed to cytoplasmic lineage, for milk, fat and protein yields, fat and protein percent or log transformations of the traits.

T. Roughsedge, S. Brotherstone, P. M Visscher

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 23: Opening: plenary; technology; transfer; beef cattle; dairy cattle; pigs., , 351–354, 1998
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