ORCID Profile
0000-0002-7274-0134
Current Organisations
Universidade de São Paulo
,
Universidade Federal de Goiás
,
Universidade Federal de Uberlândia
,
Associação Nacional de Criadores e Pesquisadores ANCP
,
Empresa Brasileira de Pesquisa Agropecuária
,
Associação Brasileira dos Criadores de Zebu, ABCZ
,
Associação Goiana dos Criadores de Zebu, AGCZ
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Publications
Multivariate approach of inter-relationships among growth, consumption and carcass traits in Nellore cattle1
Publisher: FapUNIFESP (SciELO)
Date: 03-2014
Associations between reproductive and carcass traits in Nellore
Publisher: Universidade Estadual de Londrina
Date: 16-12-2015
DOI: 10.5433/1679-0359.2015V36N6SUPL2P4423
Abstract: The objective of this study was to estimate the genetic parameters and (co)variance of Nellore animals and to characterize the associations between these characteristics for the following carcass traits: weight (W), longissimus muscle area (LMA), rump fat thickness (RF) and fat thickness between the 12th and 13th ribs obtained by ultrasound (BF) also, the following reproductive traits: age at first calving (AFC), first calving interval (FCI), scrotal circumference at 450 and 550 days of age (SC450 and SC550). The genetic parameters were estimated by a single-trait and two traits animal model using Bayesian inference. The model used for all of the features included the genetic random effect and age as covariate assuming a quadratic effect. Additionally, sex, month and year of birth and management of creation and environmental effects identified were included for the carcass traits. For AFC, FCI and SC450 and SC550, we considered only the month and year of birth. The heritability estimates for all of the traits were higher in the two traits analysis, except for AFC and FCI, which showed 0.75 and 0.29, respectively, similar values in the single trait analysis. The two traits analyses resulted in heritability estimates for a posteriori for the features W, LMA, BF, RF, SC450 and SC550 of 0.49, 0.66, 0.74, 0.68 0.66 and 0.74, respectively, suggesting the possibility of genetic gains during a short period of time. The genetic correlations between AFC and carcass traits measured by ultrasound were close to zero. A similar trend was found for AFC, SC450 and SC550 days, indicating that the selection for these traits does not promote changes in AFC. High genetic correlations (0.92, 0.93 and 0.94) were observed between the characteristics LMA and W, BF and RF, and SC450 and SC550, respectively.
Estimates of environmental effects and genetic parameters for body measurements and weight in Brahman cattle raised in Mexico
Publisher: Wiley
Date: 08-2002
Genetic correlation of traits measured by ultrasound at yearling and 18 months of age in Nellore beef cattle
Publisher: Elsevier BV
Date: 10-2015
Growth performance, and carcass and meat quality traits in progeny of Poll Nellore, Angus and Brahman sires under tropical conditions
Publisher: CSIRO Publishing
Date: 2015
DOI: 10.1071/AN13505
Abstract: This study aimed to characterise progeny of sires representing major families in the Poll Nellore breed. Fourteen Poll Nellore sires, two Angus sires and one Brahman sire were mated by AI to ~400 multiparous Poll Nellore dams. Calves were raised and stocked on pasture in central Brazil until reaching ~18 months of age, then fed a sugarcane bagasse-based diet on an ad libitum basis until reaching market weight and finish (average 23 months). There were 236 Poll Nellore (N), 38 Angus × Poll Nellore (AN) and 31 Brahman × Poll Nellore (BN) calves born in total. The weaning and 423-day weight weights, and growth rates and pre- and post-weaning were greater (P 0.05) in males than in female calves, and were influenced by breed and by sire within the N animals. The weaning weights were higher (P 0.05) in AN and BN than in N calves. The 423-day weight weights were greater (P 0.05) in AN calves, followed by BN, with straightbred N being lightest. Feedlot average daily gain was unaffected (P 0.05) by sex or by sire within N, but was lowest (P 0.05) in N cattle, and highest in AN and BN animals, which did not differ (P 0.05). Heifers reached the end of the study with lower bodyweight (BW) and dressing percentage than steers, resulting in lower carcass weights, smaller longissimus muscle areas (LMA), but greater 12th to 13th rib backfat (BF) and similar marbling score and mean shear force. However, the proportion of carcasses grading Choice or Prime was numerically greater in heifers than in steers (23.6% vs 9.8%). AN cattle reached greater harvest weights than BN, and those were heavier than N cattle (P 0.001). However, dressing percentages were lowest in AN animals, so that there was no significant difference in carcass weight between AN and BN cattle. AN carcasses also had greater LMA, BF and marbling scores than the N carcasses. The proportion of carcasses grading Choice or Prime was numerically greater in AN cattle than in the BN and N groups (25.9%, 11.8% and 15.9%, respectively). Steaks from AN calves were more tender than N steaks, with the BN steaks being intermediate. There was significant variation among N sires for final BW, dressing percentage, carcass weight, LMA and marbling score, but not for BF or mean shear force. The percentages of carcasses of N cattle grading Choice or Prime ranged from 0% to 61.5%. Three N sires produced progeny with greater than 40% of carcasses grading Choice or above (Berílio OB, Furador OB, and Litoral OB). Likewise, three N sires (Blitz OB, Furador OB and Sossego OB) had progeny with 67%, 62% and 75%, respectively, of steaks classified as tender. This study confirmed that Zebu cattle have inferior carcass and meat quality relative to AN crossbreds under tropical conditions, however there is substantial variation within the N breed for these traits, and several sires have a proportion of their progeny comparable in terms of meat tenderness to those of Angus sires.
Bayesian estimates of genetic parameters for reproductive traits in Nellore cows raised on pasture in tropical regions
Publisher: Universidad de Antioquia
Date: 11-05-2016
Selection Indices and Multivariate Analysis Show Similar Results in the Evaluation of Growth and Carcass Traits in Beef Cattle
Publisher: Public Library of Science (PLoS)
Date: 20-01-2016
Related Organisations
Associação Nacional De Criadores E Pesquisadores ANCP
Location: Brazil
Center For Cognition, Learning And Memory
Location: No location found
Related Funding Activities
No related grants have been discovered for Cláudio Ulhoa Magnabosco.