Espectroscopia do visível e infra-vermelho próximo para estimar sólidos solúveis e firmeza de polpa em função da época de colheita em pêssegos

Betemps, Débora Leitzke; Fachinello, José Carlos; Galarça, Simone Padilha; Machado, Nicácia Portela; Remorini, Damiano; Massai, Rossano; Agati, Giovanni

doi:10.5433/1679-0359.2014v35n3p1257

Cited by 1 publication

(1 citation statement)

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“…Fu et al (2008) determined firmness of different peach cultivars reported a RMSE CV of 6.3 N, SEP of 5.4 N and a R 2 of 0.87. Betemps et al (2014) using a NIR-Case of Sacmi 1 reported SEP values ranging from 12.1 to 32.7 N and R 2 from 0.16 to 0.63 for the cultivars 'Chimarrita', 'Maciel', 'Eldorado' and 'Jubileu', all with high chilling requirements peach cultivars. This variation shows that single cultivar models are possibly more accurate and reliable than a multi cultivar model (Golic and Walsh, 2006).…”

Section: Pls Prediction Models: Firmnessmentioning

confidence: 99%

Robust PLS models for soluble solids content and firmness determination in low chilling peach using near-infrared spectroscopy (NIR)

Nascimento

Carvalho

Júnior

et al. 2016

Postharvest Biology and Technology

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The objectives of this study was to develop partial least square (PLS) models using NIR spectroscopy for the determination of SSC and firmness in intact low chilling 'Aurora-1' peach fruit, and verify the influence of maturity stage and harvest season on the models to be developed (robustness). FT-NIR spectra were obtained as log 1/R with fruit harvested in 2013 at 3 maturity stages and in 2014. The spectra were collected on the background and blush colour skin areas of the each fruit. Model performance was evaluated based on the values of root mean square error for prediction (RMSE P) and coefficient of determination (R P 2) obtained from validation fruit set (Kennard-Stone), and prediction fruit set (2014). PCA could not group the fruit based on blush and background skin colour, maturity stages, and harvest season. The model constructed using the external validation method obtained a RMSE VE of 1.08 % with 11 latent variables (LV S) and a R VE 2 of 0.59. The prediction set, independent data, resulting in a less accurate model (RMSE P 1.04 %, R p 2 0.45 and 11 LV S). The same trend happened for determining firmness with the external validation resulting in better model with RMSE VE 9.51 N and R VE 2 of 0.40 and the prediction set with RMSE P of 13.2 N, R P 2 0.40 with 7 LV S. The NIR spectroscopy showed to be a potential analytical method to determine SSC and firmness of intact low chilling 'Aurora 1' cultivar. However, it is necessary to optimize the models in other to reduce the prediction errors. 2015 Elsevier B.V. All rights reserved.

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Section: Pls Prediction Models: Firmnessmentioning

confidence: 99%