Predicting Milk Yield of Holstein Cows from 306 to 395 Days in Milk

Genetic (Co)variance between Age from First to Third Calving and Milk Yield of Holstein Cows in the Tropics

A total of 245187 records of the first three lactations of 131126 Holstein cows in tropical conditions were used to estimate the genetic (co)variance components between age at calving and its respective milk productions. A multivariate analysis of six traits was performed. Heritability for age at calving (h2AC) and milk yield (h2MY) decrease from the ...

On Predicting Milk Yield and Detection of Ill Cows

The fully automated milking system VMS has different functions which complements the actual milking of cows. This master thesis presents a method to improve the calculation of milk yield in dairy cows for the VMS. This report also investigates if it is possible to improve the algorithm for finding cows with mastitis (udder inflammation). The correctness of the prediction of milk yield is import...

Defining appropriate model for genetic analysis of milk yield in different lactations of Iranian Holstein cows

In this study, appropriate genetic co (variance) structure across ages of milk production in the Iranian Holstein cows was modeled using 35167 records originated from 1098 sires and 27236 dams. These data were collected from 110 herds during 2011 to 2015 by the Iranian Animal Breeding Center. For all lactations, birth year, birth month, calving year, calving season, calving month, age and herd ...

Comparative effects of feeding millet versus barley on yield and composition of milk in holstein cows

Effects of daily exogenous oxytocin injections on milk production and fat yield in holstein cows