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Influence of the breed of bull (Bos taurus indicus vs. Bos taurus taurus) and the breed of cow (Bos taurus indicus, Bos taurus taurus and crossbred) on the resistance of bovine embryos to heat
(Elsevier B.V., 2009-08-01)
In vitro studies have shown that Bos taurus indicus (B. t. indicus) embryos submitted to heat shock at early stages of development are better able to survive as compared to Bos taurus taurus embryos. Embryo genotype ...
Physiological bases for understanding estrous cycle differences between bos taurus and bos indicus
(2010-12-01)
Background: Although there is some information in the literature discussing differences of the estrous cycle of Bos taurus and Bos indicus cattle, most of the data derive from studies performed in temperate climate countries, ...
Mitochondrial DNA of Nellore and European x Nellore crossing cattle of high performance
(Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2007-08-01)
O objetivo deste trabalho foi avaliar, por meio de um polimorfismo no gene ND5 do DNA mitocondrial de bovinos, a porcentagem de indivíduos portadores de mtDNA Bos taurus indicus em animais Nelore PO (n = 69) e em animais ...
Cytogenetic and molecular analysis of the Pantaneiro cattle breed
(Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), 2006-11-01)
O objetivo deste trablaho foi caracterizar geneticamente o bovino Pantaneiro por meio de sua ancestralidade paterna, pela morfologia de seu cromossomo Y, submetacêntrico ou acrocêntrico, e identificar a ancestralidade ...
Synaptonemal complex analysis of Nellore and Gyr breeds of Bos taurus indicus
(2000-04-01)
A synaptonemal complex (SC) study of specimens of Nellore and Gyr breeds of Bos taurus indicus was performed with the main objective to identify and determinate the frequency of abnormalities of SC and the frequency of ...
Embryo transfer in Bos indicus cattle
(Elsevier B.V., 2001-12-01)
In the present short review superovulation treatments commonly used for Bos taurus and/or Bos indicus will be addressed with emphasis in recent superstimulation protocols associated with pharmacological manipulation of the ...
Influência da raça do touro (Bos indicus x Bos taurus) na tolerância ao estresse térmico calórico de embriões bovinos produzidos in vitro
(2011-12-01)
To better understand the differences related to HS resistance between Bos indicus and Bos taurus, we aim to verify if the HS tolerance is due mostly to the genetic contribution from the oocyte, spermatozoa or both. Oocytes ...
Differential expression of members of the IGF system in OPU-derived oocytes from Nelore (Bos indicus) and Holstein (Bos taurus) cows
(2013-05-01)
The insulin-like growth factor (IGF) system is related to quality of oocytes and embryos. The aim of this study was to investigate the mRNA levels of IGF1 and IGF2 and their receptors, IGFR1 and IGFR2, as well as IGFBP2, ...
Treatments to optimize the use of artificial insemination and reproductive efficiency in beef cattle under tropical environments
(2011-12-01)
Bos indicus cattle, the preferred genetic group in tropical climates, are characterized by having a lower reproductive efficiency than Bos taurus. The reasons for the poorer reproductive efficiency of the Bos indicus cows ...