Results 131 to 140 of about 5,046 (175)

Genomic inbreeding depression for climatic adaptation of tropical beef cattle

Journal of Animal Science, 2017
Inbreeding has the potential to negatively impact animal performance. Strategies to monitor and mitigate inbreeding depression require that it can be accurately estimated. Here, we used genomewide SNP data to explore 3 alternative measures of genomic inbreeding: the diagonal elements of the genomic relationship matrix (FGRM), the proportion of ...
Reverter, A, Porto-Neto, L R, Kasarapu, P, de Cara, M A R, Burrow, H M, UNE Business School, orcid:0000-0002-7989-0426   +6 more
openaire   +5 more sources

Crossbreeding dual-purpose cattle for beef production in tropical regions

Meat Science, 1997
Six breed types groups of six steer calves each were used to observe differences in growth and carcass traits: F1 Brown Swiss (F1BS), F1 Holstein (F1HO), F2 Brahman (F2BR), F2 Criollo Rio Limon (F2CRL), purebred Criollo Rio Limon (CRL), and Perija Mosaic (PMO).
A, Rodriguez-Voigt, E, Noguera, H L, Rodriguez, N O, Huerta-Leidenz, O, Morón-Fuenmayor, E, Rincón-Urdaneta   +5 more
openaire   +2 more sources

Tropical Beef Cattle Industry in the Western Hemisphere

1952
Excerpts from the Preface: This bibliography consists of selected references, chiefly in the English, Spanish and Portuguese languages, to the literature on the beef cattle industry in the Tropics and the humid sub -tropical regions of the Western Hemisphere.
Bien, Corabel, Gould, Marie, Bien, Corabel, Gould, Marie   +3 more
openaire   +1 more source

Requirement of energy and protein of beef cattle on tropical pasture

2013
Objetivou-se estimar as exigências de proteína e energia de bovinos de corte em pastagens tropicais dos 4 até 18 meses de idade. Foram utilizados 46 bezerros Nelore (138,3 ± 3,4 kg e 90-150 dias de idade) em pastagem, distribuídos em um grupo de mantença (alimentação restrita) ou em planos nutricionais, recebendo suplemento com diferentes quantidades ...
Valente, Eriton Egidio Lisboa, Paulino, Mário Fonseca, Detmann, Edenio, Valadares Filho, Sebastião de Campos, Cardenas, Javier Enrique Garces, Dias, Isabela Fernanda Teixeira   +5 more
openaire   +2 more sources

Reproductive performance of purebred and crossbred beef cattle in the tropics of Mexico

Animal Science, 1988
AbstractRecords of beef cows on a ranch in south-east Mexico gave 1377 ages at first calving (AFC) and 3932 calving intervals (CI) for the comparison by least-squares analysis of the genetic groups: commercial zebu (CZ), Brahman, other zebu breeds and their zebu crosses (zebu), F, crosses born to zebu dams by Bos taunts or Santa Gertrudis sires, and 3 ...
A. Duarte-Ortuño, W. Thorpe, A. Tewolde
openaire   +1 more source

Factors affecting weaning weight of beef cattle in a tropical environment

Australian Journal of Experimental Agriculture and Animal Husbandry, 1974
Age corrected weaning weights from a commercial property in central Queensland were analysed by the least-squares method. The breeder herd composition varied from low to high grade Brahman cross cows, and Belmont Red, Brahman, Droughtmaster, Hereford and Santa Gertrudis bulls were used in a rotational crossbreeding programme. Age of dam had the largest
GW Seifert, TH Rudder, JW Lapworth
openaire   +1 more source

A decision support approach for the beef cattle industry of tropical Australia

Agricultural Systems, 1988
Decision support is an approach to modelling used to evaluate alternatives and to arrive at decisions. This approach recognises that the owner of the problem is responsible for decisions, and that modelling is used to assist with computation. Using a set of hypothetical data we illustrate how the approach has been used to analyse future options in ...
Gillard, Peter, Monypenny, Richard
openaire   +2 more sources

Enhancing predictions of nitrogen excretion in beef cattle in the tropics

Animal Production Science
Context Excreted fecal and urinary N can cause environmental contamination. Aims Our objective was to evaluate models for predicting nitrogen (N) excreted in feces (FN), urine (UN) and manure of beef cattle; and to update the Nutrient ...
S. C. Valadares Filho, A. S. Brito Neto, S. S. Moreira, L. F. Prados, F. H. M. Chizzotti, L. N. Rennó   +5 more
openaire   +1 more source

Genome-wide association studies of female reproduction in tropically adapted beef cattle.

Journal of animal science, 2012
The genetics of reproduction is poorly understood because the heritabilities of traits currently recorded are low. To elucidate the genetics underlying reproduction in beef cattle, we performed a genome-wide association study using the bovine SNP50 chip in 2 tropically adapted beef cattle breeds, Brahman and Tropical Composite.
Hawken, R. J., Zhang, Y. D., Fortes, M. R. S., Collis, E., Barris, W. C., Corbet, N. J., Williams, P. J., Fordyce, G., Holroyd, R. G., Walkley, J. R. W, Barendse, W., Johnston, D. J., Prayaga, K. C., Tier, B., Reverter, A., Lehnert S. A.   +15 more
openaire   +5 more sources

Genetic parameters for tropical beef cattle in northern Australia: a review

Australian Journal of Agricultural Research, 1993
This paper reviews published estimates of genetic parameters for traits of growth, reproduction and resistance to environmental stresses for Bos indicus and Zebu derived breeds in northern Australia. Most published estimates of heritabilities for growth and reproduction traits were higher for tropically adapted breeds in northern Australia than for Bos
openaire   +1 more source