Breeding objectives of Brangus cattle in Brazil

Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used to estimate economic values (EVs). The scenarios simulated were typical full‐cycle beef production systems that are used in tropical and subtropical regions. The breeding objectiv...

Full description

Saved in:
Bibliographic Details
Published in:Journal of animal breeding and genetics (1986) 2020-03, Vol.137 (2), p.177-188
Main Authors: Simões, Michele R. S., Leal, Joal J. B., Minho, Alessandro P., Gomes, Cláudia C., MacNeil, Michael D., Costa, Rodrigo F., Junqueira, Vinícius S., Schmidt, Patrícia I., Cardoso, Fernando F., Boligon, Arione A., Yokoo, Marcos J.
Format: Article
Language:English
Subjects:
Animal husbandry
Beef
Beef cattle
bioeconomic model
Breeding
Cattle
Computer simulation
Economic models
economic value
Economics
Ectoparasites
Eggs
Environmental effects
Livestock breeding
Nematodes
Pregnancy
production system
Profitability
selection criteria
Stochastic models
Stochasticity
Weight
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used to estimate economic values (EVs). The scenarios simulated were typical full‐cycle beef production systems that are used in tropical and subtropical regions. The breeding objective contained pregnancy rate (PR), warm carcass weight (WCW), mature cow weight (MCW), number of nematode eggs per gram of faeces (EPG) and tick count (TICK). Two models were used in series to estimate the EV. A deterministic model was used to simulate effects of PR, WCW and MCW on profitability with a constant parasite load. Subsequently, stochastic models were used to estimate economic values for TICK and EPG as consequences of their environmental effects on weight gains, mortality and health costs. The EV of PR, WCW, MCW, EPG and TICK, was US$1.59, US$2.11, −US$0.24, −US$5.35 and −US$20.88, respectively. Results indicate positive emphasis should be placed on PR (12.49%) and WCW (65.07%) with negative emphasis on MCW (13.92%), EPG (2.77%) and TICK (5.75%). In comparison with the indexes usually used, these results suggest a reformulation in the selection indexes of the beef production system in tropical and subtropical regions in order to obtain greater profitability.
ISSN:0931-2668
1439-0388
DOI:10.1111/jbg.12415