A general bio-economic model for be

A general bio-economic model for beef cattle production was used to define breeding objectives for Charolais cattle to be
utilized in a variety of linked production systems. Economic weights were calculated for 16 traits (some with both direct and
maternal components) in three production systems (pure-breeding and terminal crossing with beef or dairy cows) and two
marketing strategies (sale or fattening of weaned surplus calves). Economic weights for the total breeding objective were
calculated as weighted averages, where weights were numbers of cows expected to be mated with Charolais bulls in each
production system and marketing strategy. Results suggest that the direct component of calving performance and cow longevity
were of primary economic importance in all systems. Conception rate of cows and weaning weight reached about 50% of the
standardized economic weight of calving performance in purebred systems with sale of weaned calves, whereas in purebred
systems with fattening the economic importance of the direct component of cow conception rate, losses at calving, mature
weight of cows, weaning weight, and fattening traits were of equal importance (each approximately about 20% that of calving
performance). In terminal crossing systems, weaning weight was important when calves were sold at weaning, and fattening
traits were important for systems selling fattened animals. The bio-economic model performed well under the conditions of this
demonstration and could easily be customized for other applications.
D 2005 Elsevier B.V. All rights reserved.

Results (English) 2:

A general Beef Cattle Production for Bio-Economic Model was used to define for Charolais Cattle Breeding objectives to be
utilized in a Variety of linked Production Systems. Economic Weights were calculated for 16 traits (Some with both Direct and
maternal components) in Three Production Systems (Pure-Breeding and Beef or Dairy cows with terminal Crossing) and Two
Marketing Strategies (fattening or sale of surplus Calves weaned). Weights for the Economic Breeding Objective total were
calculated as weighted averages, where Weights Numbers of cows were expected to be mated with Charolais Bulls in each
Production System and Marketing Strategy. Direct results suggest that the Performance Component of calving and longevity Cow
were of primary importance in all Economic Systems. Conception rate of cows and weaning weight reached About 50% of the
standardized Economic weight of calving Performance in purebred Systems with sale of weaned Calves, whereas in purebred
Systems with fattening the Economic importance of the Direct Component of Cow conception rate, losses at calving,. mature
weight of cows, weaning weight, and fattening traits were of importance Equal (each approximately About 20% of that calving
Performance). Crossing Systems in terminal, weaning weight was important when SOLD Calves were at weaning, and fattening
traits were important for selling Systems Fattened animals. The Bio-Economic Model performed well under the conditions of this
demonstration and could be easily customized for Other Applications.
Elsevier BV All rights reserved 2005th D.

Results (English) 3:

A general bio - economic model for beef cattle production was used to define breeding objectives for Charolais cattle to. Be.Utilized in a variety of linked production systems. Economic weights were calculated for 16 traits (some with both direct. And.Maternal components) in three production systems (pure-breeding and terminal crossing with beef or dairy cows) and two.Marketing strategies (sale or fattening of weaned surplus calves). Economic weights for the total breeding objective were.Calculated as, weighted averages where weights were numbers of cows expected to be mated with Charolais bulls in each.Production system and marketing strategy. Results suggest that the direct component of calving performance and cow longevity.Were of primary economic importance in all systems. Conception rate of cows and weaning weight reached about 50% of the.Standardized economic weight of calving performance in purebred systems with sale of, weaned calves whereas in purebred.Systems with fattening the economic importance of the direct component of cow conception rate losses at calving mature,,,Weight cows of, weight weaning, fattening and traits were of equal importance (each approximately about 20% that of calving.Performance). In terminal crossing systems weaning weight, was important when calves were sold at weaning and fattening,,Traits were important for systems selling fattened animals. The bio - economic model performed well under the conditions. Of this.Demonstration and could easily be customized for other applications.D 2005 Elsevier B.V. All rights reserved.