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Lactation Persistency as a Component Trait of the Selection Index and Increase in Reliability by Using Single Nucleotide Polymorphism in Net Merit Defined as the First Five Lactation Milk Yields and Herd Life
Economic Weights Milk Yield Persistency Herd Life Selection Index
2016/5/10
We first sought to clarify the effects of discounted rate, survival rate, and lactation persistency as a component trait of the selection index on net merit, defined as the first five lactation milks ...
Relationships among milk production, reproductive traits, and herd life for Tunisian Holstein-Friesian cows
Milk production reproductive traits herd life dairy cattle.
2009/3/3
The objective of this study was to link productive life of Tunisian dairy cows to their performances of milk, fat, and protein yields and fertility traits. Data included 128,652 records collected fr...