We investigated the effect of stage of pregnancy on estimates of breeding values for milk yield and milk persistency in Gyr and Holstein dairy cattle in Brazil. Test-day milk yield records were analyzed using random regression models with or without the effect of pregnancy. Models were compared using residual variances, heritabilities, rank correlations of estimated breeding values of bul...

the objective of this study was to evaluate the concentration of these acute phase proteins(serum amyloid a, milk amyloid a and serum haptoglobin) and alteration in hematological values in some inflammatory diseases in dairy cattle. fifty-six holstein dairy cows with some inflammatory diseases were used in this study including: subclinical mastitis, hematological infections (theileriosis and an...

The data from the newly available 50 K SNP chip was used for tagging the genome-wide footprints of positive selection in Holstein-Friesian cattle. For this purpose, we employed the recently described Extended Haplotype Homozygosity test, which detects selection by measuring the characteristics of haplotypes within a single population. To assess formally the significance of these results, we com...

The objective of this research was to investigate the capability donor cattle produce embryos by comparing three breeds, namely Bos taurus beef (Limousin), dairy (Friesian Holstein/FH), and indicus (Peranakan Ongole/PO). This observational method with in vivo embryo production a nonsurgical collection (flushing). data collected were then processed using one way ANOVA method. results showed that...

the study was carried out at agarfa atvet college dairy farm to evaluate the reproductive performance of holstein friesian× arsi and holstein friesian ×boran cattle. for the study, records compiled from 1983 to 2012 at the agarfa dairy farm were used as original data. the effects of breed, bloodlines, season and parity on the reproductive traits were evaluated. data were analyzed using the gene...

The modern genealogical structure of the Ukrainian population Holstein breed consists 16 lines. In addition, breeding bulls Black-and-White dairy cattle and Red-and-White cattle, Jersey, Angler Swiss breeds are used for reproduction in 5 farms. most common lines terms number Starbuck 352790, Chief 1427381 Elevation 1491007 with a total share 71.42%. Cavalier 1620273, Astronaut 1458744, Regal 35...

Microsatellite (MS) markers have recently been used for parental verification and are still the international standard despite higher cost, error rate, and turnaround time compared with Single Nucleotide Polymorphisms (SNP)-based assays. Despite domestic and international interest from producers and research communities, no viable means currently exist to verify parentage for an individual unle...

Insulin-like growth factor 1 (IGF-1) has been shown to be associated with fertility, growth, and development in cattle. The aim of this study was to (1) identify novel single nucleotide polymorphisms (SNPs) in the bovine IGF-1 gene and alongside previously identified SNPs (2) determine their association with traits of economic importance in Holstein-Friesian dairy cattle. Nine novel SNPs were i...