Results 51 to 60 of about 32,248 (275)

Madagascar's grasses and grasslands:anthropogenic or natural? [PDF]

, 2016
Grasses, by their high productivity even under very low pCO2, their ability to survive repeated burning and to tolerate long dry seasons, have transformed the terrestrial biomes in the Neogene and Quaternary.
Bosser J, Brummitt RK, Clayton WD, Dransfield S, Drukker DM, ESRI, Faramalala MH, Humbert H, Humbert H, Kellogg EA, Koechlin J, Lewis BA, Maddison WP, Moat J, Morat P, Muasya AM, Nanjarisoa OP, Perrier de la Bâthie H, R Development Core Team, Vollesen K, Vollesen K, Vorontsova MS   +21 more
core   +1 more source

Genetic Parameters for Novel Feedlot Profitability‐Related Traits in Nelore Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study aimed to estimate (co)variance components and genetic parameters for accumulated profitability (AFP) and profit per kilogram of liveweight gain (PFT), and their relationships with weight at 450 days of age (W450), scrotal circumference at 365 days of age (SC365), age at first calving (AFC), probability of precocious calving at 30 ...
Letícia Pereira, Fernando Baldi, Guilherme Jordão Magalhães Rosa, José Bento Sterman Ferraz, Tiago Zanett Albertini, Minos Carvalho, Raysildo Barbosa Lobo, Eduardo da Costa Eifert, Elisa Peripolli, Cláudio Ulhôa Magnabosco   +9 more
wiley   +1 more source

Estudo genético quantitativo de características de carcaça e perímetro escrotal utilizando inferência Bayesiana em novilhos nelore

Bioscience Journal, 2010
Objetivou-se com este estudo avaliar o método de amostragem de Gibbs (GS) como ferramenta para se estimar os componentes de (co)variância e parâmetros genéticos para características de carcaça e reprodutivas: área de olho de lombo (AOL); espessura de ...
Vanessa Barbosa, Cláudio Ulhoa Magnabosco, José Benedito de Freitas Trovo, Carina de Ubirajara Faria, Dyomar Toledo Lopes, Marco Antônio de Oliveira Viu, Raysildo Barbosa Lôbo, Mariana Márcia Santos Mamede   +7 more
doaj  

Probability density function of the number of embryos collected from superovulated Nelore breed donors Função de densidade de probabilidade do número de embriões produzidos por doadoras da raça Nelore

Scientia Agricola, 2009
Several models have been developed to evaluate reproductive status of cows through concentration of progesterone in milk, the effect of sex selection in the commercial production of herds and bioeconomic performance of the multiple ovulation and embryo ...
Renato Travassos Beltrame, Luis Gustavo Barioni, Celia Raquel Quirino, Ozanival Dario Dantas   +3 more
doaj   +1 more source

No evidence for a recent genetic bottleneck in the endangered Sheko cattle breed (African Bos taurus) revealed by microsatellite analysis [PDF]

, 2009
Sheko is African taurine cattle, valued for its milk yield, adaptation to humid tsetse infested environment and trypanotolerance. We used 30 microsatellite markers in analyzing 30 DNA samples. We found high genetic diversity and no genetic bottlenecks in
Hailu Dadi, Hirofumi Hanada, Joram Mwacharo, Koh Nomura, Markos Tibbo, Takashi Amano, Yukimizu Takahashi   +6 more
core   +1 more source

Impact of Model Parameterisation and Variance Component Estimates on Genomic Predictions of Carcass Traits in Montana Composite Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT This study evaluated the influence of variance component (VC) estimates, obtained from different models and two relationship matrices, pedigree‐based (BLUP) and genomic information‐based (ssGBLUP), on genomic predictions of carcass traits in Montana composite cattle.
Caroline Assis Almeida, Felipe Eguti de Carvalho, Flávia Cristina Bis, Rachel Santos Bueno Carvalho, Elisângela Chicaroni de Mattos, Rafael Espigolan, Joanir Pereira Eler, Luís Telo da Gama, Fernando Baldi, José Bento Sterman Ferraz   +9 more
wiley   +1 more source

Parâmetros genéticos para a produção de leite de controles individuais de vacas da raça Gir estimados com modelos de repetibilidade e regressão aleatória Estimation of genetic parameters for test day milk records of first lactation Gyr cows using repeatability and random regression animal models

Revista Brasileira de Zootecnia, 2005
Registros individuais perfazendo 8.183 controles de produção de leite (PLC) de 1.273 primeiras lactações de vacas da raça Gir de rebanhos supervisionados pela ABCZ no período 1994/2000 foram utilizados para se estimar componentes de variância e ...
Claudio Napolis Costa, Claudio Manoel Rodrigues de Melo, Carlos Henrique Crivelari Machado, Ary Ferreira de Freitas, Irineu Umberto Packer, Jaime de Araújo Cobuci   +5 more
doaj   +1 more source

Genomic Prediction Ability Using Linear and Threshold Approaches for Different Stayability Definitions in Nellore Females

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Enhancing female longevity through regular calvings improves herd replacement rates and reduces the costs associated with replacing low reproductive efficiency animals. Stayability (STAY), defined as a cow's ability to remain productive in the herd, is a categorical trait that challenges traditional genetic evaluation due to its non‐normal ...
Letícia Silva Pereira, Larissa Bordin Temp, Eduarda da Silva Oliveira, Jorge Hidalgo, Cláudio Ulhoa Magnabosco, Fernando Baldi   +5 more
wiley   +1 more source

Reactivity of Nellore steers in two feedlot housing systems and its relationship with plasmatic cortisol [PDF]

, 2010
To evaluate reactivity to assess the temperament of Nellore steers in two feedlot housing systems (group pen or individual pen) and its relationship with plasmatic cortisol, 36 experimental units were observed five times at 28-day intervals of weight ...
Gatto, E.G., Nogueira Filho, J.C.M., Noronha, M.S.N., Pereira, A.M.F., Titto, C.G., Titto, E.A.L.   +5 more
core   +1 more source

Genetic Parameters of Methane Emission, Feed Efficiency, Feeding Behaviour, and Growth Traits in Beef Cattle

Journal of Animal Breeding and Genetics, EarlyView.
ABSTRACT Climate change has intensified the need to reduce greenhouse gas emissions, particularly methane (CH4) from enteric fermentation. Genetic selection has emerged as a promising mitigation strategy; however, studies on Bos taurus indicus , especially Nellore cattle, remain limited.
J. A. Silva, J. P. S. Valente, L. F. M. Mota, G. R. D. Rodrigues, T. L. S. Soares, J. O. S. Marcatto, A. M. Pelaez, F. M. Monteiro, R. C. Canesin, L. G. Albuquerque, M. E. Z. Mercadante   +10 more
wiley   +1 more source