The Selected Factors Influenced Growth Ability to Weaning of Aberdeen Angus Cattle

Abstract

The aim of this study was to evaluate eff ects of sex of calves, year of calving, cows' parity and sire eff ect on growth ability to weaning. The evaluation of growth indicators of Aberdeen Angus cattle was performed in the period of 4 years (2010 to 2013) in 2 diff erent farms. A total of 272 calves (bulls, n = 141; heifers, n = 131) were monitored. The indicators of live weight at birth, live weight at the age of 120 and 210 days, average daily gains from birth to 120 and 210 days of age were observed. Statistical so ware SAS 9.3 was used to analyze the results. The highest result growth parameters of calves were observed from cows on 3 rd and 4 th parity. In 2012 we observed the highest values of calves' growth ability compare to others. In evaluating the sire eff ect diff erences (P < 0.05-0.01) were found mainly between the top three sires from the fi rst evaluated herd (PAA240, ZAA562, ZAA595) and three sires from the second evaluated herd (ZAA675, ZAA697, ZAA762). The order of sires according to weight in 210 days of their off spring is then almost perfect refl ection of the relative breeding values (RBV) for the direct eff ect of growth.

Potential of Blue-Grey Cattle Managed Under Organic Farming Conditions of Czechia

“…Extent of influence for various effects were already identified in previous studies e.g. Dadi et al, 2002, Toušová et al, 2015Lengyel et al, 2003;Karhula and Kässi, 2010. For example, influence of year and season of birth were confirmed in the studies of Lengyel et al (2003) and Karhula and Kässi, (2010).…”

“…Naturally, these gains can be higher in intensive breeding systems -up to 2.5 kg per day (Shorthorn breeding program, 2016). Shorthorn growth ability could be comparable to other beef breeds popular in Czech Republic like Aberdeen Angus (Toušová, et al 2015).…”

“…Calve growth ability is influenced by the genetics, mother's maternal traits, mother's living conditions and other environmental factors (Ducháček et al, 2011). Significant influence of multiple factors like breed, sex, nutrition, used technology or year and season of birth has already been identified in previous studies (Koknaroglu et al, 2005;Krupa et al, 2005;Szabó et al, 2006;Toušová et al, 2015).…”

Днк-Анализ Полиморфизма Генов Миостатина, Лептина И Кальпаина 1 У Российской Популя-Ции Крупного Рогатого Скота Абердин-Ангусской Породы

“…Абердин-ангусы -высокопродуктивная порода мясного скота, которая получила широкое распространение во всем мире (5). Животные этой породы отличаются высокой энергией роста: среднесуточные приросты живой массы составляют более 1000 г, а у лучших особей могут достигать 1300-1500 г (6). Также к характерным признакам абердин-ангусской породы, передающимися и при скрещивании с другими породами, относятся комолость, нежное тонковолокнистое мясо с хорошо выраженной мраморностью (7,8).…”