the objective of this study was to estimates the genetic and environmental components for the lactation curve parameters, milk yield, age at first calving (afc), calving interval (ci) and somatic cell count (scc) in iranian holstein cows. the dataset consisted of 210625 test day records from 25883 cows with milk yield in the first parity recorded from july 2002 to september 2007 in a total of 9...

This study set out to demonstrate the feasibility of merging data from different experimental resource dairy populations for joint genetic analyses. Data from four experimental herds located in three different countries (Scotland, Ireland and the Netherlands) were used for this purpose. Animals were first lactation Holstein cows that participated in ongoing or previously completed selection and...

A total of 5852 records concerning daily milk yield, content of protein and fat, and somatic cell count was recorded in two farms (organic and conventional). Somatic cell count was log10transformed before analysis because was not normally distributed. The mixed model methodology was used according to a repeated-measures scheme, as the restricted maximum likelihood method to estimate lactation c...

This study aims to investigate the effectiveness of teat dipping using sirih leaf extract (Piper betle) and bacteria in dairy farms located Cijeruk Subdistrict, Bogor Regency, West Java. The research employs an experimental design utilizing a Completely Randomized Design (CRD) with four treatments: (1) masofilm (2% iodine) as positive control, (2) bacteriocin (protein content = 11.17 g mL-1) (P...

the objective of this research was to estimate the genetic parameters and trend of somatic cell count in holstein cows of iran using test day records. the phenotypic the used data consisted of were consisting of 407167 first lactation test day records the which were collected by the center of animal breeding and livestock production improvement center of iran during 2009 to 2013. somatic cell c...

genetic and phenotypic parameters related to production traits, udder conformation and somatic cell count for the iranian holstein cows were estimated. monthly records of somatic cell counts (scc) were primarily transformed into somatic cell scores (scs) and the the average level of lactation period, with correction for milk volume, was calculated. by use of these estimates an udder health inde...

Bactencins belong to the bovine cathelicidin family of proteins, and their role in body is significant. The study analyzed relationship between polymorphisms within CATHL2 CATHL3 genes encoding Bac-5 Bac-7 proteins. included a herd Polish Holstein-Friesian cows black-and-white breed. Tests were conducted using PCR-RFLP method with introduction ACRS modification. showed that different genetic va...

The present study was conducted to study production parameters of lactating Murrah buffaloes supplemented with Tinospora cordifolia. Twelve lactating Murrah buffaloes in early stage of lactation were selected from the herd of National Dairy Research Institute Karnal, Haryana. The buffaloes were divided into two groups of six animals each. One group was taken as control and the other group suppl...