Índices zootécnicos do composto Marchangus considerados para o melhoramento do rebanho

Abstract

The data used are from São Marcos Ranch, Dois Vizinhos – PR, from 2009 to 2010. It were used different genetic groups from the Marchangus Project. The aim was to evaluate the birth weight (BW), weaning weight (WW), maternal efficiency (MEF), average daily gain (ADG) and body condition score in cows. Statistical analyzes were performed using the program SAS, (2004). Birth weight and weaning weight of MZ50, Marchangus F1 Marchangus and F2 calves were, respectively, 29.27, 35.29, 34.05 kg for Bwand 202.85, 168.24 and 184.83 kg for PD. MEF and the amount of Kg to increase 0.5 points of body condition of zebu, Marchigiana and Marchangus cows were 0.47, 0.29, 0.41and 29.84, 38.80 and 49.91 kg, respectively. ADG of calves weighed at 5 and 7 months were were 0.775 and 0.695. The MZ50 and MS calves born light and easy. The zebu cows crossed with Marchangus bulls show MEF close to 50% in tipical Iguassu Valley conditions of pastures. The MS cows can maintain better body conditions than MA cows, that can be an advantage in situation of negative energetic balance. The Angus Breed when crossed with Marchigiana produce crossbred females Marchangus smaller, with better MEF and milk production than purebreed Marchigiana cows.