Efficiency of sire evaluation methods by using phase and stayablity traits to improve milk yield of Murrah buffaloes

Abstract

The present investigation was conducted on records of 345 Murrah buffaloes maintained at Buffalo Research Centre (BRC), Hisar distributed over 20 years (1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012) to compare progeny of 61 sires. Three sire evaluation procedures [ordinary least squares (OLS), regressed least squares (RLS), and best linear unbiased prediction (BLUP)] based on estimated breeding value of phase traits such as ascending phase milk yield (APY), peak phase milk yield (PPY),descending phase milk yield (DPY)and stayablity trait such as stayablity life (STAYAB) in Murrah buffalo. The results indicated that sire number 26 had the highest merit computed by OLS, RLS and sire number 2 had the highest merit computed by BLUP method for APY. Product-moment correlations were comparatively lower than those of rank correlations barring a few exceptions. When comparison was made on the basis of coefficient of skewness, BLUP was found superior for APY, PPY, and DPY. When comparison was made on the basis of coefficient of kurtosis, OLS was better for APY and DPY whereas RLS was found superior for PPY and STAYAB. When coefficient of Determination, was considered OLS was found to be more accurate followed by RLS method for all the traits, whereas RLS method was most appropriate when coefficient of variation was considered.

Sire Evaluation Based on First Lactation Production Efficiency Traits in Murrah Buffaloes

“…Lower ranges for FLMY (553.86) and higher ranges for MY/FLL (1.87) and MY/FCI (2.14) in Holstein Friesian crossbred cattle were reported [8]. The higher range of estimated breeding values of sires by BLUP method for MYLL, MYFCI and MYASC as 5.4 to 7.44, 3.13 to 5.49 and 0.86 to 1.31 in Murrah buffaloes compared to the present study [9].…”

Comparative Efficiency of Sire Evaluation Procedures in Murrah Buffaloes

“…Similar findings were also reported by various researchers; Gaur et al, (2001), Dhaka et al, (2004), Banik and Gandhi (2006), Bajetha (2006), Mukherjee et al, (2007), Kumar et al, (2008), Moges et al, (2009 and Kamaldeep et al, (2015). Rank and product moment correlations among sire merit calculated by various sire evaluation procedures for different performance traits revealed that product moment correlations were comparatively higher than those of rank correlations barring few exceptions.…”

“…To improve the efficiency and accuracy of sire evaluation programmes many sire indices has been developed such as by using the procedures of Least-squares (LS), Regressed Least-Squares (RLS), Best Linear Unbiased Prediction (BLUP) and Derivative Free Restricted Maximum Likelihood Method (DFREML). The literature is dotted with conflicting reports (Pundir et al, 2004;Dhaka et al, 2004;Banik and Gandhi, 2006;Raja, 2010;Kamaldeep et al, 2015) on comparative evaluation of various sire evaluation techniques in dairy animals. Therefore, an effort has been made to estimate breeding values for various performance traits by different procedures and comparison of these procedures to find out the most suitable for evaluation of Murrah sires.…”

Comparative Studies on Different Sire Evaluation Methods: Review

“…The BLUP method was second efficient followed by LSM and SRLS method. Kamaldeep et al, (2015) conducted studies to compare progeny of 61 sires. Three sire evaluation procedures [ordinary least squares (OLS), regressed least squares (RLS), and best linear unbiased prediction (BLUP)] based on estimated breeding value of phase traits such as ascending phase milk yield (APY), peak phase milk yield (PPY),descending phase milk yield (DPY)and stayablity trait such as stayablity life (STAYAB) in Murrah buffalo.…”