Estimation of variances due to direct and maternal effects for growth traits of Nelore cattle.
- J. Eler, L. D. Van Vleck, J. Ferraz, R. Lôbo
- Medicine, BiologyJournal of Animal Science
- 1 November 1995
The estimates for maternal genetic effects showed that the contribution of this component to the phenotypic variance of birth and weaning weight is not very high but is still present at yearling weight, while heritability estimates for direct effects were lower than previous values reported for the Nelore breed.
Heritability and genetic correlation estimates for performance and carcass and body composition traits in a male broiler line.
Based on the heritability estimates obtained, the analyzed traits seemed to be able to respond to selection, at variable intensities, and were suggestive of a close genetic relationship between these traits.
Animal model estimation of genetic parameters and response to selection for litter size and weight, growth, and backfat in closed seedstock populations of large white and Landrace swine.
Records from 2,495 litters and 14,605 Landrace and Large White pigs from two farms, but established from the same base population and run as replicated selection lines, were analyzed and genetic, phenotypic, and environmental parameters for the number of pigs born alive, litter weight at 21 d, average daily gain, and backfat thickness adjusted to 104 kg were estimated.
Production systems--an example from Brazil.
Genetic evaluation of the probability of pregnancy at 14 months for Nellore heifers.
EPD for probability of pregnancy can be used to select heifers with a higher probability of being fertile, however, it is mainly recommended for the selection of bulls for the production of precocious daughters because the accuracy of prediction is higher for bulls, depending on their number of daughters.
Population structure and inbreeding effects on growth traits of Santa Inês sheep in Brazil.
Liver transcriptomic networks reveal main biological processes associated with feed efficiency in beef cattle
Liver transcriptomic network analysis coupled with other results demonstrated that LFE animals present altered lipid metabolism and increased hepatic periportal lesions associated with an inflammatory response composed mainly by mononuclear cells.
Additive genetic relationships between heifer pregnancy and scrotal circumference in Nellore cattle.
- J. Eler, J. A. V. Silva, J. Evans, J. Ferraz, F. Dias, B. Golden
- MedicineJournal of Animal Science
EPD for heifer pregnancy can be used to select bulls for the production of precocious daughters and will be more effective than selecting on scrotal circumference EPD in Nellore cattle, however, sc Rotal circumference can be incorporated in a two-trait analysis to increase the accuracy of prediction for heifers pregnancy EPD for young bulls.
Study of stayability in Nellore cows using a threshold model.
The heritability and genetic trend estimates for all stayability traits indicate that it is possible to improve fertility with selection based on a threshold analysis of stayability, and indicates that selection for improved female traits would be more effective by having predictions on the Stay5 trait.
Genome-wide CNV analysis reveals variants associated with growth traits in Bos indicus
This study presents the first CNV-based GWAS of growth traits using high density SNP microarray data in cattle and detected 17 CNVs significantly associated with seven growth traits and one of them (CNV100) may be involved in growth traits through KCNJ12.