Th e aim of study was to investigate diff erent models for the evaluation of dairy bulls for male fertility. A dataset containing single insemination records performed on Brown Swiss cows and heifers reared in Eastern Italian Alps was used. Th e outcome variable (successful/ unsuccessful) was analyzed as binary trait. In the fi rst step raw conception rate was computed for each service sire, as...

In pork production, the efficiency of dietary protein (AA) use is low, resulting in urinary excretion of large quantities of nitrogen as urea. Use of AA and formation of urea are under enzymatic regulation, suggesting genetic regulation. The current study examined the effects of sire line, sire, and sex on growth characteristics and plasma urea nitrogen (PUN) concentrations in the offspring of ...

Economics of poultry production can be improved by reducing input on health care (major investment) and increasing production. It necessitates evaluation and exploitation of immunocompetence traits of germplasm. An investigation was carried out on 174 Kadaknath native chickens, maintained at this institute to evaluate immunocompetence profile. Data on three traits viz., antibody response to she...

The aim of this study was to investigate piglet preweaning survival and its relationship with a total merit index (TMI) used for selection of Large White terminal boars for dry-cured ham production. Data on 13,924 crossbred piglets (1,347 litters), originated by 189 Large White boars and 328 Large White-derived crossbred sows, were analyzed under a frailty proportional hazards model, assuming d...

AIM The aim was to estimate genetic and non-genetic factors affecting morphometric traits of Sirohi goats under field condition. MATERIALS AND METHODS The detailed information of all animals on body measurements at birth, 3, 6, 9, and 12 months of age was collected from farmer's flock under field condition born during 2007-2013 to analyze the effect of genetic and non-genetic factors. The lea...

Genetic parameters for birth weight (BWT), preweaning mortality (PWM), and HCW were estimated for a crossbred pig population to determine if BWT could be used as an early predictor for later performances. Sire genetic effects for those traits were estimated to determine if early selection of purebred sires used in crossbreeding could be improved. Data were recorded from 1 commercial farm betwee...