Search results for " Somatic cell score"

showing 3 items of 3 documents

Effect of weather conditions on somatic cell score in Sicilian Valle del Belice ewes

2010

Mastitis susceptibility of Valle del Belice ewes from the south of Sicily to temperature, humidity, precipitation, solar radiation, sun hours, air pressure, wind-speed and wind-direction measured by a public weather station was investigated using 65,848 test-day somatic cell score (SCS) records of 5,237 ewes. All weather parameters had an effect on SCS in a regression approach. Extreme values of maximum and minimum temperaturehumidity indices resulted in increased SCS. Higher precipitation, solar radiation and sun hours resulted in increased SCS, whereas higher air pressure and wind speed resulted in reduced SCS.

integumentary system040301 veterinary sciences0402 animal and dairy scienceHumidity04 agricultural and veterinary sciencesDairy sheep Mastitis Somatic cell scoreWeather effects.040201 dairy & animal sciencelanguage.human_languageWind speedWeather station0403 veterinary scienceAnimal sciencenervous systemlanguageEnvironmental scienceAnimal Science and ZoologyPrecipitationlcsh:Animal cultureSiciliantissueslcsh:SF1-1100Italian Journal of Animal Science
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Estimation of genetic and phenotypic parameters for bacteriological status of the udder,somatic cell score,and milk yield in dairy sheep using a thre…

2013

Abstract The objective of this study was to estimate the genetic parameters for infection status (INF), as indicator of mastitis, SCS (i.e., log-transformed SCC), and milk yield (MY), by using a Gibbs sampling algorithm. The data comprised 17,843 test-day records of 2040 ewes. The pedigree file included 2948 animals. A bivariate variance component analysis was performed using the TM software. Fixed effects considered in the analysis were litter size, parity, flock by test-day interaction, year by season of lambing interaction, and stage of lactation; whereas the animal, and the permanent environmental effect within and across lactations were considered as random as well as the error. Flat p…

Litter (animal)Veterinary medicineGeneral VeterinaryDomestic sheep reproductionBiologyHeritabilitymedicine.diseaseGenetic correlationMastitisinfection status somatic cell score milk yield sheep threshold modelSettore AGR/17 - Zootecnica Generale E Miglioramento Geneticomedicine.anatomical_structureAnimal scienceLactationmedicineAnimal Science and ZoologyUdderThreshold model
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Weighted Single-Step Genome-Wide Association Study Uncovers Known and Novel Candidate Genomic Regions for Milk Production Traits and Somatic Cell Sco…

2022

The objective of this study was to uncover genomic regions explaining a substantial proportion of the genetic variance in milk production traits and somatic cell score in a Valle del Belice dairy sheep. Weighted single-step genome-wide association studies (WssGWAS) were conducted for milk yield (MY), fat yield (FY), fat percentage (FAT%), protein yield (PY), protein percentage (PROT%), and somatic cell score (SCS). In addition, our aim was also to identify candidate genes within genomic regions that explained the highest proportions of genetic variance. Overall, the full pedigree consists of 5534 animals, of which 1813 ewes had milk data (15,008 records), and 481 ewes were genotyped with a …

Settore AGR/17 - Zootecnica Generale E Miglioramento Geneticocandidate genes dairy sheep milk fat milk protein somatic cell scores window regionsGeneral VeterinaryAnimal Science and Zoologywindow regions; candidate genes; dairy sheep; milk fat; milk protein; somatic cell scores
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