Title
Authentication of cocoa (Theobroma cacao) bean hybrids by NIR-hyperspectral imaging and chemometrics
Date Issued
01 December 2020
Access level
open access
Resource Type
journal article
Author(s)
Fernández Pierna J.A.
Rogez H.
Barbin D.F.
Baeten V.
University of Campinas
Publisher(s)
Elsevier Ltd
Abstract
The hybridization of cocoa generates new varieties with the aim of opening new flavors, textures, and disease resistance. The objective of this study was to develop and validate classification models based on NIR hyperspectral imaging and chemometrics for the discrimination of five valuable cocoa bean hybrids. The chemometrics tools, PLS-DA and SVM, showed comparable results for two-class (hybrids) models, but SVM (3.8–23.1% prediction error) was superior to PLS-DA (4.4–34.4% prediction error) when all five classes (hybrids) were included in a model. PLS-DA maps showed a simple and informative way to discriminate hybrids, allowing a correct classification in 50–100% of cases. Finally, it can be concluded that the models created in this work could be a good and reliably alternative to the actual visual method for the discrimination of cocoa bean hybrids.
Volume
118
Language
English
OCDE Knowledge area
Bioquímica, Biología molecular Biotecnología agrícola, Biotecnología alimentaria
Scopus EID
2-s2.0-85087373051
Source
Food Control
ISSN of the container
0956-7135
Sponsor(s)
This study was financed in part by Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 ; and São Paulo Research Foundation (FAPESP) (project number 2019/04833-3 , 2018/02500-4 , 2015/24351-2 ). This study was also financed by the BELCOBRA ‘Optimization and implementation of analytical methods for the traceability and authenticity of cocoa and chocolate’ ( Brazil-Belgium cooperation CAPES-WBI/2017-2019/361394 ). Authors are grateful to CEPLAC (Medicilandia, PA, Brazil) for the mature fruits, to Teixeira L.E.O. and Freitas A.L. (UFPA) for their technical assistance for fermentation and drying process and to N. Kayoka (CRA-W) for hi technical assistance in NIR-HSI measurements. J. P. Cruz-Tirado acknowledges scholarship funding from FAPESP / BEPE , grant n° 2019/04833- 3 . This study was financed in part by Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior ? Brasil (CAPES) ? Finance Code 001; and S?o Paulo Research Foundation (FAPESP) (project number 2019/04833-3, 2018/02500-4, 2015/24351-2). This study was also financed by the BELCOBRA ?Optimization and implementation of analytical methods for the traceability and authenticity of cocoa and chocolate? (Brazil-Belgium cooperation CAPES-WBI/2017-2019/361394). Authors are grateful to CEPLAC (Medicilandia, PA, Brazil) for the mature fruits, to Teixeira L.E.O. and Freitas A.L. (UFPA) for their technical assistance for fermentation and drying process and to N. Kayoka (CRA-W) for hi technical assistance in NIR-HSI measurements. J. P. Cruz-Tirado acknowledges scholarship funding from FAPESP/BEPE, grant n? 2019/04833- 3.
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