Domestication of livestock species and a long history of migrations, selection and adaptation
have created an enormous variety of breeds. Conservation of these genetic resources relies …

Fascioliasis, caused by liver fluke species of the genus Fasciola, has always been well
recognized because of its high veterinary impact but it has been among the most neglected …

Since their domestication in the Neolithic, cattle have belonged to our cultural heritage. The
reconstruction of their history is an active field of research 1 that contributes to our …

Puberty in Zebu heifers follows a pattern characterized by a decrease in the steroid
feedback mechanism and an increase in LH concentration, which result in the first ovulation …

Together with their sister subspecies Bos taurus, zebu cattle (Bos indicus) have contributed
to important socioeconomic changes that have shaped modern civilizations. Zebu cattle …

Cattle imported from the Iberian Peninsula spread throughout America in the early years of
discovery and colonization to originate Creole breeds, which adapted to a wide diversity of …

Summary The ancestry of New World cattle was investigated through the analysis of
mitochondrial and Y chromosome variation in Creoles from Argentina, Brazil, Mexico …

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 …

Elevated temperature can reduce developmental competence of the preimplantation
embryo. Whether an embryo survives elevated temperature depends on its genotype, stage …

The use of relatively low numbers of sires in cattle breeding programs, particularly on those
for carcass and weight traits in Nellore beef cattle (Bos indicus) in Brazil, has always raised …