Search results for "mastitis resistance"

showing 2 items of 2 documents

Association study between beta-defensin gene polymorphisms and mastitis resistance in Valle del Belice dairy sheep breed

2016

Abstract Mastitis is generally caused by bacteria, and it is the most common disease in livestock species. Defensins are peptides with a broad spectrum of antimicrobial activity and β-defensin genes have been studied in several livestock species due to their important role in the innate immune response. The aim of this study was to establish an association between polymorphisms in the β-defensin 1 and 2 genes and mastitis resistance in the Valle del Belice dairy sheep. Data consisted of 1855 and 2804 observations for case and control group, respectively. Six single nucleotide polymorphisms and seven haplotypes were selected for association studies with mastitis. In particular, polymorphism …

0301 basic medicineCandidate geneMastitis resistanceSingle-nucleotide polymorphismBiologyβ-defensin genes; Mastitis resistance; Single Nucleotide Polymorphisms; Valle del Belice dairy sheep breed03 medical and health sciencessingle nucleotide polymorphismsSettore AGR/17 - Zootecnica Generale E Miglioramento GeneticoFood AnimalsPolymorphism (computer science)β-Defensin genes mastitis resistance single nucleotide polymorphisms Valle del Belice dairy sheep breedmedicineDefensinGenetic associationGeneticsValle del Belice dairy sheep breedHaplotypemedicine.diseaseBreedMastitis030104 developmental biologySingle Nucleotide PolymorphismAnimal Science and Zoologyβ-defensin geneβ-Defensin genes
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GeneticParameters for Milk Somatic Cell Score and Relationships with Production Traits in Primparous Dairy Sheep

2007

A total of 13,066 first-lactation test-day records of 2,277 Valle del Belice ewes from 17 flocks were used to estimate genetic parameters for somatic cell scores (SCS) and milk production traits, using a repeatability test-day animal model. Heritability estimates were low and ranged from 0.09 to 0.14 for milk, fat, and protein yields, and contents. For SCS, the heritability of 0.14 was relatively high. The repeatabilities were moderate and ranged from 0.29 to 0.47 for milk production traits. The repeatability for SCS was 0.36. Flock-test-day explained a large proportion of the variation for milk production traits, but it did not have a big effect on SCS. The genetic correlations of fat and …

MaleVeterinary medicineSomatic cellyieldsselectionBiologyAnimal Breeding and Genomicsheritabilitydairy sheepgenetic parameterAnimal scienceAnimal modelPregnancyfatGenetic variationGeneticsAnimalsLactationFokkerij en Genomicamilk productionlactation curvesSheepModels Geneticintegumentary systemsomatic cell countGenetic VariationewesHeritabilityMilk productionDairyingParityMilkPhenotypenervous systemcountprotein percentagemastitis resistanceTraitWIASAnimal Science and ZoologyFemaleFlockanimal-modelSomatic cell counttissuesFood Science
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