Genetic Parameters and Animal Model Evaluation of First Lactation 305-d Milk Yield and Energy Traits in Karan Fries Cattle

Abstract

First lactation records of 351 Karan-Fries cows born to 27 bulls, having 3 or more progeny were used to evaluate sires by animal model (AM). Heritabilities, genetic and phenotypic correlations between the traits were estimated by univariate and bivariate linear animal models. The heritability estimates for 305 days or less milk yield (305MY), fat based energy corrected milk yield (FECMY), fat protein based energy corrected milk yield (FPECMY) and fat protein lactose based energy corrected milk yield (FPLECMY) were 0.23, 0.65, 0.11 and 0.39, respectively. There was a high (0.99) genetic and phenotypic correlation between 305MY, FECMY and FPLECMY. The high and positive genetic correlations between energy traits are indication of common genetic and physiological mechanism governing these traits. Comparison of ranks of the sires based on 305MY, FECMY and FPLECMY by animal model depicted a notable100 per cent level of similarity except for FPECMY in which the ranks were entirely different. There was a high heritability and genetic correlation between FECM and FPLECM. Genetic evaluation of Karan-Fries bulls based on energy corrected milk yield will increase the accuracy of selection than the conventional mil yield evaluation. It can help in mitigating the nutritional insecurity of the country in the long run.

Certain factors affecting first lactation individual monthly milk yields in Frieswal cattle

“…The overall least squares averages for first to tenth monthly yields were estimated as 313.92,347.53,337.36,323.32,305.50,288.26,269.47,236.35,229.84 and 158.23 kg, in the first lactation of Frieswal cows. The average yields obtained for different months were nearer to the values reported by Singh (2006) in Karan Fries cattle. However, the monthly averages obtained in the present study were higher than the estimates reported by Kumar (1990), Varshney and Tomar (1982), Shrivastava and Khan (1987), Raja (2012) and Mundhe et al (2015) in Sahiwal cattle.…”

“…significant effect of AFC on second to sixth individual monthly yields in Sahiwal cattle. The significant influence of AFC on different monthly yields was also reported by Varshney and Tomar (1982), Shrivastava and Khan (1987), Kumar (1990), Qureshi et al (1995), Gaur (1996), Singh (2006) and Raja (2010). However, Roy et al (2001) reported non-significant regression of monthly milk yields on AFC in HF cattle.…”

“…The significant influence of season of calving on various individual monthly milk yields was observed by many workers (Shrivastava and Khan 1987, Kumar 1990, Gaur 1996, Pawar and Narayankhedkar 2002, Singh 2006, Raja 2010, Mundhe et al 2015 in different breeds of cattle. However, Singh et al (1988) and Qureshi et al (1995) reported non-significant influence of season of calving on different part lactation milk yields in Sahiwal and Gir cattle, respectively.…”

​Genetic Analysis of Production and Reproduction Traits of Ongole Cattle in an Organized Farm of Andhra Pradesh

“…Hertitability of various traits studied were presented in Table 3. The Heritability estimates for 305 DLMY yield was 0.40±0.16, which is higher than the reports of Singh et al (2020). The total LMY was moderate (0.31± 0.14) which is higher than the reports of Singh et al (2008) and Vinoo et al (2005) in Ongole cattle.…”

Genetic Analysis of First Lactation Monthly Test Day Milk Yields, Peak Yield and 305 Days Milk Yield in Murrah Buffaloes

“…The usefulness of test day milk yields and peak yield depends on the estimation of genetic parameters like heritability of these records, and genetic and phenotypic correlations amongst these records and with FL305DMY. The estimation of genetic parameters plays an important role in determining the appropriate method of selection to predict direct and correlated response to selection, and formulating optimum breeding strategies for future genetic improvement of dairy animals (Singh et al, 2020;Jamuna et al, 2015;Godara et al, 2015;Pareek and Narang, 2014). Information on genetic parameters estimates of monthly test day milk yields and peak yield records of buffaloes is scanty to date, therefore, the present investigation was conducted to assess the genetic parameters for monthly test day milk yields, peak yield and first lactation 305 days milk yield in Murrah buffaloes.…”