Google Scholar: citas
An attempt to identify milk protein fraction genotypes using unsupervised and supervised near-infrared spectroscopy methods
Navarro, Norma S. (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Albanell Trullas, Elena (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
De Marchi, M (Università di Padova)
Manuelian, Carmen L (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)

Fecha: 2024
Descripción: 7 pàg.
Resumen: The aim was to evaluate near-infrared spectroscopy (NIRS) potential to discriminate among β-casein (CN), κ-CN and β-lactoglobulin (LG) genotypes to be used as an authentication method. A total of 168 milk samples with known genetic information for β-CN, κ-CN and β-LG were collected at the same farm and paired with the NIRS spectrum. Spectra were evaluated with an unsupervised method (principal component analysis, PCA) and a supervised method (partial least squares-discriminant analysis, PLS-DA). For the PLS-DA, data were split into a train (75%) and a test set (25%), and the variable in projection >1 criterion was applied to select informative wavelengths. Results obtained confirmed that milk quality was similar among genetic variants. For the PCA, the observed variance explained by the first two principal components was 94%, but samples were not clustered by their genotypes of β-CN (i. e. A1A2, A2A2), κ-CN (i. e. AA, AB, AE, BB, BE) and β-LG (i. e. AA, AB, BB). The best accuracy for the PLS-DA models was reached by β-CN (train and test set, 64%), followed by β-LG (train set, 56%; test set, 52%) and κ-CN (train set, 41%; test set, 36%). In conclusion, the PCA on milk spectra was not able to cluster β-CN, κ-CN and β-LG genotypes, but the PLS-DA models revealed promising results for β-CN and β-LG. It could be interesting to increase the number of samples to equilibrate genetic variants and to apply a sampling selection method before discarding the applicability of NIRS as an authentication method.
Derechos: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. Creative Commons
Lengua: Anglès
Documento: Article ; recerca ; Versió publicada
Materia: A2 milk ; NIRS ; Genetic polymorphism ; Protein variants
Publicado en: Italian journal of animal science, Vol. 23 Núm. 1 (2024) , p. 313-319, ISSN 1828-051X

DOI: 10.1080/1828051X.2024.2314157


8 p, 953.2 KB

El registro aparece en las colecciones:
Artículos > Artículos de investigación
Artículos > Artículos publicados

 Registro creado el 2024-04-17, última modificación el 2024-12-09



   Favorit i Compartir