Ai breeding strategy for dual-purpose cattle populations
نویسندگان
چکیده
منابع مشابه
Strategies of European Fleckvieh Cattle Breeding to Optimize Dual-purpose Breeding Particularly for Beef Production
The Fleckvieh breed, while internationally recognized as a dual-purpose breed is primarily used as a beef production animal in Ireland. However because of ever increasing pressure to improve efficiency, it is now accepted in Irish cattle breeding that beef production characteristics should be included in the national dairy cattle breeding programme. This development was accepted following a com...
متن کاملTotal merit indices in dual purpose cattle
The economic efficiency of dual purpose cattle is influenced by a large number of traits which may be classified in groups of dairy, beef and functional traits. The combination of estimated breeding values for single traits in a total merit index, as long practised in some Scandinavian countries, is currently being implemented in a number of Central European states. Economic values for populati...
متن کاملLow Cost Feeding Strategies for Dual Purpose Cattle in Venezuela
This simulation study was to evaluate low cost feeding strategies in response to higher cost of commercial concentrates to maintain current milk sales from dual purpose cattle herds in the humid lowlands of western Venezuela. Data were from farm surveys in 1987 and 1988. Baseline net margins from milk and beef per cow per year were $132 and $99 for two farm cases with average dally milk of 10 a...
متن کاملEconomic selection index development for Beefmaster cattle II: General-purpose breeding objective.
An economic selection index was developed for Beefmaster cattle in a general-purpose production system in which bulls are mated to a combination of heifers and mature cows, with resulting progeny retained as replacements or sold at weaning. National average prices from 2010 to 2014 were used to establish income and expenses for the system. Genetic parameters were obtained from the literature. E...
متن کاملBreeding Cattle for Mastitis Resistance
The development of an immunological assay where cells isolated from blood are stimulated by an Staphylococcus aureus antigen in vitro is described. Variation was observed in the ability of cells isolated from young cattle, cows and bulls to respond in vitro to S. aureus, suggesting that differences in immune responsiveness may be measured by this method. Bull progeny groups were shown to have c...
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ژورنال
عنوان ژورنال: Genetics Selection Evolution
سال: 1972
ISSN: 1297-9686
DOI: 10.1186/1297-9686-4-1-137b