Effect of Non-genetic Factors on Udder and Teat Morphometric Traits in Sahiwal and Karan Fries Cows

Abstract

Background: The present study was designed to find out the magnitude of environmental and other non-genetic factors affecting the linear udder and teat type traits in Sahiwal and Karan Fries cows. Methods: Total eight udder morphometric traits and seven teat morphometric traits were measured in 87 Sahiwal and 166 Karan Fries cows. The data regarding milk yield, stage of lactation, parity and season of calving for all Sahiwal and Karan Fries cows were collected. Result: In Karan Fries cows, udder and teat type traits were significantly affected by parity and stage of lactation, while in Sahiwal cow udder and teat type traits were significantly affected by parity only. Teat circumference was significantly affected by season and stage of lactation. The results indicated that parity and stages of lactation were important sources of variation for most of linear udder and teat type traits.

Prediction of some milk production traits using udder and teat measurements with a spotlight on their genetic background in Friesian cows

“…Deng et al 46 obtained relatively high positive correlation coefficient (0.64) between milk yield and udder length and concluded that the latter should be an important criterion for selecting dairy cows and can be used with a satisfactory precision for predicting milk yield because the regression of milk yield on udder length had the highest R 2 and each cm increase in udder length represent 0.22 kg extra yield of milk. Sinha et al 68 reported 0.51, 0.51 and 0.55 coefficients of determinations for the regressions of total milk yield, 305 days milk yield and peak yield, respectively on udder width and Singh et al 48 reported higher accuracy of prediction for the regression of milk yield on udder width measurement.…”