Back to Search
Start Over
Genetic parameters for type classification of Nelore cattle on central performance tests at pasture in Brazil
- Source :
- Tropical Animal Health and Production. 45:1627-1634
- Publication Year :
- 2013
- Publisher :
- Springer Science and Business Media LLC, 2013.
-
Abstract
- The objective of this study was to characterize Nelore cattle on central performance tests in pasture, ranked by the visual classification method EPMURAS (structure, precocity, muscle, navel, breed, posture, and sexual characteristics), and to estimate genetic and phenotypic correlations between these parameters, including visual as well as production traits (initial and final weight on test, weight gain, and weight corrected for 550 days). The information used in the study was obtained on 21,032 Nelore bulls which were participants in the central performance test at pasture of the Brazilian Association for Zebu Breeders (ABCZ). Heritabilities obtained were from 0.19 to 0.50. Phenotypic correlations were positive from 0.70 to 0.97 between the weight traits, from 0.65 to 0.74 between visual characteristics, and from 0.29 to 0.47 between visual characteristics and weight traits. The genetic correlations were positive ranging from 0.80 to 0.98 between the characteristics of structure, precocity and musculature, from 0.13 to 0.64 between the growth characteristics, and from 0.41 to 0.97 between visual scores and weight gains. Heritability and genetic correlations indicate that the use of visual scores, along with the selection for growth characteristics, can bring positive results in selection of beef cattle for rearing on pasture.
- Subjects :
- Male
Sexual characteristics
Breeding
Biology
Beef cattle
Weight Gain
Pasture
Animal science
Food Animals
medicine
Animals
Animal Husbandry
Selection (genetic algorithm)
geography
geography.geographical_feature_category
Reproduction
Body Weight
Heritability
Zebu
Breed
Phenotype
Body Composition
Cattle
Animal Science and Zoology
medicine.symptom
Weight gain
Brazil
Subjects
Details
- ISSN :
- 15737438 and 00494747
- Volume :
- 45
- Database :
- OpenAIRE
- Journal :
- Tropical Animal Health and Production
- Accession number :
- edsair.doi.dedup.....f5fd857aff73f282abdd23bc6c0fcd2a