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author = "NICOLAZZI, EZEQUIEL LUIS"
> : "UnissResearch" "UnissResearch"
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Found 7 documents, displaying page 1 of 1
Use of different marker pre-selection methods based on single SNP regression in the estimation of Genomic-EBVs
Description :
Two methods of SNPs pre-selection based on single marker regression for the estimation
of genomic breeding values (G-EBVs) were compared using simulated data provided by the
XII QTL-MAS workshop: i) Bonferroni correction of the significance threshold and ii) Permutation test
to obtain the reference ...
Repository :
UnissResearch
Language(s) :
English
Analysis of lactation shapes in extended lactations
Author(s) :
Steri, Roberto
,
Dimauro, Corrado
,
Canavesi, F.
,
Nicolazzi, Ezequiel Luis
,
Macciotta, Nicolò Pietro Paolo
Description :
In order to describe the temporal evolution of milk yield (MY) and composition in extended lactations, 21 658 lactations of Italian Holstein cows were analyzed. Six empirical mathematical models currently used to fit 305 standard lactations (Wood, Wilmink, Legendre, Ali and Schaeffer, quadratic and ...
Repository :
UnissResearch
Language(s) :
Undetermined
Using eigenvalues as variance priors in the prediction of genomic breeding values by principal component analysis
Author(s) :
Macciotta, Nicolò Pietro Paolo
,
Gaspa, Giustino
,
Steri, Roberto
,
Nicolazzi, Ezequiel Luis
,
Dimauro, Corrado
,
Pieramati, Camillo
Description :
Genome-wide selection aims to predict genetic merit of individuals by estimating the effect of chromosome segments on phenotypes using dense single nucleotide polymorphism (SNP) marker maps. In the present paper, principal component analysis was used to reduce the number of predictors in the estimat...
Repository :
UnissResearch
Language(s) :
Undetermined
Prediction of genomic breeding values for dairy traits in Italian Brown and Simmental bulls using a principal component approach
Author(s) :
Pintus, Maria Annunziata
,
Gaspa, Giustino
,
Nicolazzi, Ezequiel Luis
,
Vicario, Daniele
,
Rossoni, Attilio
,
Ajmone-Marsan, Paolo
Description :
The large number of markers available compared with phenotypes represents one of the main issues in genomic selection. In this work, principal component analysis was used to reduce the number of predictors for calculating genomic breeding values (GEBV). Bulls of 2 cattle breeds farmed in Italy (634 ...
Repository :
UnissResearch
Language(s) :
Undetermined
Use of different statistical models to predict direct genomic values for productive and functional traits in Italian Holsteins
Author(s) :
Pintus, Maria Annunziata
,
Nicolazzi, Ezequiel Luis
,
Van Kaam, J.B.C.H.M.
,
Biffani, Stefano
,
Stella, Alessandra
Description :
One of the main issues in genomic selection was the huge unbalance between number of markers and phenotypes available. In this work, principal component analysis is used to reduce the number of predictors for
calculating direct genomic breeding values (DGV) for production and functional traits. 2093...
Repository :
UnissResearch
Language(s) :
Undetermined
Analysis of BTA6 in Bruna Italiana and Pezzata Rossa cattle assayed with 2,535 SNPs
Author(s) :
Ajmone-Marsan, Paolo
,
Marino, Rosanna
,
Perini, Davide
,
Sibella, Francesca
,
Nicolazzi, Ezequiel Luis
,
Pariset, Lorraine
Description :
A high density SNP marker panel (54,000 SNPs) was used to investigate the genome of 775 Bruna
Italiana and 493 Pezzata Rossa bulls. Observed and expected heterozygosities were calculated overall
and per chromosome. In both breeds, values were not significantly different. Bos taurus Chromosome...
Repository :
UnissResearch
Language(s) :
English
Assessment of 29 candidate genes for milk traits in Italian dairy cattle
Author(s) :
Pariset, Lorraine
,
Caroli, Anna
,
Chessa, Stefania
,
Fontanesi, Luca
,
Russo, Vincenzo
,
Bagnato, Alessandro
,
Schiavini, Fausta
Description :
Several investigations have recently searched for significant association between gene polymorphisms
and milk traits in livestock and model species. In several cases, it remains rather difficult to assess if
the observed effects are caused by the mutation tested, by a nearby mutation in the same gen...
Repository :
UnissResearch
Language(s) :
English
1
Found 7 documents, displaying page 1 of 1