AIM In Senegal, uncontrolled cross-breeding of cattle breeds and changes in production systems are assumed to lead to an increase of gene flow between populations. This might constitute a relevant threat to livestock improvement. Therewith, this study was carried out to assess the current genetic diversity and the phylogenetic relationships of the four native Senegalese cattle breeds (Gobra zeb...

Artificial insemination of farm animals is very common in today's animal husbandry in the developed world, especially for breeding dairy cattle (75% of all inseminations) and swine (up to 85% of all inseminations). It is used for breeding buffaloes, sheep, goats, horses, dogs and a variety of laboratory animals as well. It allows a male to inseminate a much larger number of females and to use t...

Artificial insemination was used in an attempt to breed three groups of Brahman cross cows on two properties in north Queensland. On one property the attempt was abandoned due to low incidence of detected oestrus in lactating cows. On the other property calving rates following insemination were 20.8% and 16.4% over two years. Vibriosis was one cause of low fertility. Semen was collected satisfa...

The objective of the present study was to determine polymorphism within the promoter region of somatotropin receptor genes in indigenous Sistani cattle (Bos indicus) and associations between this polymorphism and breeding value of birth weight. The pedigree structure was included by considering 1173 animals with 600 progeny birth weight data obtained from a Zhark breeding station in Sistan and ...

Genomic selection (GS) approaches, in combination with reproductive technologies, are revolutionizing the design and implementation of breeding programs in livestock species, particularly in cattle. GS leverages genomic readouts to provide estimates of breeding value early in the life of animals. However, the capacity of these approaches for improving genetic gain in breeding programs is limite...

The aim of this study was to determine the seroprevalence of Toxoplasma gondii infection in Hamedan province, Western Iran. A number of 1,406 serum samples were evaluated for IgG-antibodies against T. gondii in rural and industrial cattle in this region using ELISA. Thirty-two (2.3%) of the samples were seropositive. The results indicated that there was a significant correlation between seropre...

A serological survey of brucellosis in cattle and buffalo was performed in 23 States of India. A total of 30,437 bovine samples, comprising 23,284 cattle and 7,153 buffalo (Bubalus bubalis), were screened. The screening initially used the rose bengal plate test: doubtful and positive samples were then titrated in the serum tube agglutination test. The overall prevalence rate of antibodies was 1...

Significant attention perpetually surrounds possible changes in breeding herd inventories in the U.S. beef cattle industry. This article outlines economic considerations of U.S. herd expansion. Factors restricting expansion include land availability, increasing production efficiency, operator demographics, capital requirements, and commodity price volatility. Several offsetting factors support ...

Marbling is an important trait regarding the quality of beef. Analysis of beef cattle transcriptome and its expression profile data are essential to extend the genetic information resources and would support further studies on beef cattle. RNA sequencing was performed in beef cattle using the Illumina High-Seq2000 platform. Approximately 251.58 million clean reads were generated from a high mar...

effects of inbreeding coefficient on estimates of genetic parameters, breeding values and genetic trends for production traits (milk, fat and protein yields), reproduction traits (age at the first calving, interval between first insemination to conception, calving interval, interval between calving to first insemination, and calving ease) as well as longevity of holstein cattle in iran were stu...