Search results for "Sicilian cattle breeds"
showing 5 items of 5 documents
Genome structure in Sicilian cattle breeds
2014
Genomic technologies provide background information concerning genome structure in domestic animals. The aim of this work was to investigate the genetic structure and the patterns of linkage disequilibrium (LD) in two Sicilian local cattle breeds, Cinisara and Modicana. Genotypes from animals of Italian Holstein breed were also used to investigate the relationship among breeds. Structure software was used to analyze the genetic structure and assign the individuals to each cluster. The genetic relationship between individuals was estimated by Principal Components Analysis (PCA) of genetic distance. A standard descriptive LD parameter (r2) was obtained between adjacent SNPs and for all pairwi…
LINKAGE DISEQUILIBRIUM AND GENETIC DIVERSITY IN TWO SICILIAN CATTLE BREEDS ASSESSED BY BOVINE SNP CHIP
2013
The Modicana (MOD) and Cinisara (CIN) are two Sicilian cattle breeds farmed in extensive systems and their economic importance lies on the traditional making of two typical ‘pasta filata’ cheeses. The aim of this study was to explore the genetic structure and the extent of Linkage Disequilibrium (LD) of MOD and CIN cattle breeds. A total of 144 animals were genotyped, using the Bovine SNP50K v2 BeadChip. The squared correlation coefficient between two loci (r2) was used as a measure of LD. Principal components analysis (PCA), molecular inbreeding (F) and Bayesian clustering algorithm (Pritchard et al., 2000) were used to explore the relationship between individuals and populations. The r2 r…
Using of SNP markers to estimate inbreeding, coancestry and effective population size in Sicilian cattle breeds
2014
Maintaining the highest levels of genetic diversity and limiting the increase in inbreeding is the premise of most conservation programs. The aim of this work was to estimate the inbreeding (F), coancestry (f) and effective population size (Ne) in two Sicilian cattle breeds, Cinisara (CIN) and Modicana (MOD). Rate of molecular inbreeding and coancestry were used to estimate the Ne. A total of 144 animals were genotyped using the Illumina Bovine SNP50K v2 BeadChip. The average molecular F and f coefficients were 0.68±0.024 and 0.67±0.03 in CIN and 0.69±0.020 and 0.70±0.03 in MOD cattle breeds, respectively. The results were not unexpected considering the reduced number of reared animals and …
The Sicilian cattle breeds in a global context: genome-wide relationship with other worldwide cattle
2015
Genomic technologies, such as high-throughput genotyping based on Single Nucleotide Polymorphism (SNP) arrays, provide background information concerning genome structure in domestic animals. The aims of this study were to cluster animals, to explore the relationships among and within breeds, and to place the Sicilian breeds, Cinisara and Modicana, in a global context. The Illumina Bovine SNP50K v2 BeadChip genotyping data from 144 animals of Sicilian breeds and from other 1,543 animals belonging to 134 domesticated bovid breeds (DRYAD) were used. These breeds arose from 3 domesticated (sub)species: Bos javanicus, B. taurus indicus, and B. t. taurus. Principal Component Analysis (PCA) genera…
The genome-wide structure of two economically important indigenous Sicilian cattle breeds
2014
Genomic technologies, such as highthroughput genotyping based on SNP arrays, provided background information concerning genome structure in domestic animals. The aim of this work was to investigate the genetic structure, the genome-wide estimates of inbreeding, coancestry, effective population size (Ne), and the patterns of linkage disequilibrium (LD) in 2 economically important Sicilian local cattle breeds, Cinisara (CIN) and Modicana (MOD), using the Illumina Bovine SNP50K v2 BeadChip. To understand the genetic relationship and to place both Sicilian breeds in a global context, genotypes from 134 other domesticated bovid breeds were used. Principal component analysis showed that the Sicil…