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Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?

Milk obtained from sheep grazing natural pastures and some forage crops may be worth a plus value as compared to milk obtained from stall-fed sheep, due to their apparently higher content of beneficial fatty acids (FAs). Fourier transformed mid-infrared (FT-MIR) analysis of FA can help distinguish m...

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Autores principales: Molle, Giovanni, Cabiddu, Andrea, Decandia, Mauro, Sitzia, Maria, Ibba, Ignazio, Giovanetti, Valeria, Scanu, Giuseppe, Addis, Margherita, Caredda, Marco
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8060481/
https://www.ncbi.nlm.nih.gov/pubmed/33898541
http://dx.doi.org/10.3389/fvets.2021.623823
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author Molle, Giovanni
Cabiddu, Andrea
Decandia, Mauro
Sitzia, Maria
Ibba, Ignazio
Giovanetti, Valeria
Scanu, Giuseppe
Addis, Margherita
Caredda, Marco
author_facet Molle, Giovanni
Cabiddu, Andrea
Decandia, Mauro
Sitzia, Maria
Ibba, Ignazio
Giovanetti, Valeria
Scanu, Giuseppe
Addis, Margherita
Caredda, Marco
author_sort Molle, Giovanni
collection PubMed
description Milk obtained from sheep grazing natural pastures and some forage crops may be worth a plus value as compared to milk obtained from stall-fed sheep, due to their apparently higher content of beneficial fatty acids (FAs). Fourier transformed mid-infrared (FT-MIR) analysis of FA can help distinguish milk from different areas and diverse feeding systems. The objective was to discriminate milk from sheep and milk from dairy sheep rotationally grazing Italian ryegrass or berseem clover for 2, 4, or 6 h/day. To test this hypothesis, a data-mining study was undertaken using a database of 1,230 individual milk spectra. Data were elaborated by principal component analysis (PCA) and analyzed by linear discriminant analysis (LDA) with or without the use of genetic algorithm (GA) as a variable selection tool with the primary aim to discriminate grazed forages (grass vs. legume), access time (2, 4, or 6 h/day), grazing day (first vs. last grazing day during the 7-day grazing period), and the milking time (morning vs. afternoon milking). The best-fitting discriminant models of FT-MIR spectra were able to correctly predict 100% of the samples differing for the pasture forage, 91.9% of the samples differing for grazing day, and 97.1% of the samples regarding their milking time. The access time (AT) to pasture was correctly predicted by the model in 60.3% of the samples, and the classification ability was improved to 77.0% when considering only the 2 and 6 h/day classes.
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spelling pubmed-80604812021-04-23 Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time? Molle, Giovanni Cabiddu, Andrea Decandia, Mauro Sitzia, Maria Ibba, Ignazio Giovanetti, Valeria Scanu, Giuseppe Addis, Margherita Caredda, Marco Front Vet Sci Veterinary Science Milk obtained from sheep grazing natural pastures and some forage crops may be worth a plus value as compared to milk obtained from stall-fed sheep, due to their apparently higher content of beneficial fatty acids (FAs). Fourier transformed mid-infrared (FT-MIR) analysis of FA can help distinguish milk from different areas and diverse feeding systems. The objective was to discriminate milk from sheep and milk from dairy sheep rotationally grazing Italian ryegrass or berseem clover for 2, 4, or 6 h/day. To test this hypothesis, a data-mining study was undertaken using a database of 1,230 individual milk spectra. Data were elaborated by principal component analysis (PCA) and analyzed by linear discriminant analysis (LDA) with or without the use of genetic algorithm (GA) as a variable selection tool with the primary aim to discriminate grazed forages (grass vs. legume), access time (2, 4, or 6 h/day), grazing day (first vs. last grazing day during the 7-day grazing period), and the milking time (morning vs. afternoon milking). The best-fitting discriminant models of FT-MIR spectra were able to correctly predict 100% of the samples differing for the pasture forage, 91.9% of the samples differing for grazing day, and 97.1% of the samples regarding their milking time. The access time (AT) to pasture was correctly predicted by the model in 60.3% of the samples, and the classification ability was improved to 77.0% when considering only the 2 and 6 h/day classes. Frontiers Media S.A. 2021-04-08 /pmc/articles/PMC8060481/ /pubmed/33898541 http://dx.doi.org/10.3389/fvets.2021.623823 Text en Copyright © 2021 Molle, Cabiddu, Decandia, Sitzia, Ibba, Giovanetti, Scanu, Addis and Caredda. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Veterinary Science
Molle, Giovanni
Cabiddu, Andrea
Decandia, Mauro
Sitzia, Maria
Ibba, Ignazio
Giovanetti, Valeria
Scanu, Giuseppe
Addis, Margherita
Caredda, Marco
Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title_full Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title_fullStr Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title_full_unstemmed Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title_short Can FT-Mid-Infrared Spectroscopy of Milk Samples Discriminate Different Dietary Regimens of Sheep Grazing With Restricted Access Time?
title_sort can ft-mid-infrared spectroscopy of milk samples discriminate different dietary regimens of sheep grazing with restricted access time?
topic Veterinary Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8060481/
https://www.ncbi.nlm.nih.gov/pubmed/33898541
http://dx.doi.org/10.3389/fvets.2021.623823
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