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Published online by Cambridge University Press: 23 November 2017
Type traits have been used as indirect measures of selection for herd life in last few decades, because type traits can be measured earlier in first lactation, they have relative higher heritability than longevity traits and are correlated moderately with herd life. Increased herd life leads to lower replacement costs, longer use of high performance animals in their herds and also obtaining more progenies from high yielding animals.