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Mitochondrial DNA of Nellore and European x Nellore crossing cattle of high performance
(Pesquisa Agropecuária Brasileira, Brasília, v. 42, n.8, p. 1203-1205, ago. 2007, 2014)
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 ...
Are crossbred cattle (F1, Bos indicus x Bos taurus) thermally different to the purebred Bos indicus cattle under moderate conditions?
(Elsevier B.V., 2021-04-01)
In this study we compared the bio-thermal responses of a crossbred (F1, Nellore x Angus) and purebred Bos indicus (Nellore) cattle kept under moderate thermal conditions. Specifically, we assessed if they were different ...
Heparin-binding proteins of seminal plasma in Nellore bulls
(Universidade Federal de Santa Maria (UFSM), 2009-02-01)
O objetivo deste estudo foi identificar proteínas ligadoras à heparina no plasma seminal de touros Nelore (Bos taurus indicus). Para tanto, foram selecionados quatro touros entre 30 e 36 meses de idade e peso aproximado ...
Complete replacement of the mitochondrial genotype in a Bos indicus calf reconstructed by nuclear transfer to a bos taurus oocyte
(2001-05-22)
Due to the exclusively maternal inheritance of mitochondria, mitochondrial genotypes can be coupled to a particular nuclear genotype by continuous mating of founder females and their female offspring to males of the desired ...
Risk factors related to resistance to Rhipicephalus (Boophilus) microplus and weight gain of heifers
(2015-01-01)
The aim of the present study was to evaluate the influence of age and genetics in dairy heifers on resistance to the cattle tick Rhipicephalus (Boophilus) microplus and correlate these parameters with weight gain. Twenty-two ...
Effect of early luteolysis in progesterone-based timed AI protocols in Bos indicus, Bos indicus × Bos taurus, and Bos taurus heifers
(Los Altos, 2008)
The objective of this study was to evaluate the effects of treatment with an intravaginal progesterone-releasing device (CIDR) and estradiol benzoate (EB) on follicular dynamics in Bos indicus (n = 23), Bos taurus (n = ...