Thailand is a tropical country affected by global climate change and has high temperatures
and humidity that cause heat stress in livestock. A temperature–humidity index (THI) is …

Methods The data included production and reproduction records of animals that have calved
between 1979 and 2013. The genetic parameters were estimated using multivariate mixed …

Genetic parameters for fertility traits in Czech Holstein population were estimated. The
database obtained from the Czech-Moravian Breeders Corporation with 6 414 486 …

Background The effect of heat stress on livestock production is a worldwide issue. Animal
performance is influenced by exposure to harsh environmental conditions potentially …

Genotype-by-environment (G× E) interactions could play an important role in cattle
populations, and it should be considered in breeding programmes to select the best sires for …

Background Subfertility is one challenge facing the dairy industry as the average Holstein
heifer conception rate (HCR), the proportion of heifers that conceive and maintain a …

The genetic correlations between reproductive traits in cows and milk-production traits (305-
day milk yield and lactation persistency) were estimated by using first-lactation records …

Background The objective of the present study was to estimate (co) variance components of
female fertility traits in Chinese Holsteins, considering fertility traits in different parities as …

1Department of Genetics and Animal Breeding, University of Tabriz, Tabriz, Iran
2Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran …

The objective of this study was to estimate the genetic, phenotypic and environmental
parameters for calving interval (CI), days open (DO), number of services per conception …