Tha aelaction In dairy animals for overall economic returns should normally ba dons on the basia of an index. Tha traits like age at first calving, lactation length and calving interval need to bo considered along with first lactation milk yield. However, combining these traits in an lndsx and selecting for it requires lot of computations. It would, therefore, ba desirable to develop some simple measures of economic merit uaing important economic traits. The present study, accordingly, was undertaken to develop some measures of efficiency of milk production and estimate the genetic and phenotypic parameters of these measures.
Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 7. Symposia (1), , 157–161, 1982
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