Título:	Development of a diagrammatic scale for the evaluation of postharvest physiological deterioration in cassava roots.
Autoria:	VENTURINI, M. T. SANTOS, L. R. dos OLIVEIRA, E. J. de
Afiliação:	MARCELA TONINI VENTURINI, Universidade Federal do Recôncavo da Bahia; LEANDRO RIBEIRO DOS SANTOS, Universidade Federal do Recôncavo da Bahia; EDER JORGE DE OLIVEIRA, CNPMF.
Ano de publicação:	2015
Referência:	Pesquisa Agropecuária Brasileira, Brasília, DF., v.50, n.8, p.658-668, ago. 2015.
Conteúdo:	The objective of this work was to develop a scale to assess the severity of postharvest physiological deterioration (PPD) of cassava roots, and to validate this scale for accuracy and reproducibility estimates. A diagrammatic scale (0 to 100%) for the damaged roots was analyzed according to precision, accuracy, and reproducibility. Seven evaluators (four with experience and three without it) quantified the PPD severity, with or without the scale, considering 150 roots with different levels of PPD. Without and with the use of the scale, respectively, the inexperienced evaluators obtained coefficients of determination (R2) from 0.76 to 0.86 and 0.87 to 0.92, and the experienced evaluators obtained R2 from 0.90 to 0.96 and 0.96 to 0.97. The values of the intercept (a) obtained by both the experienced and inexperienced evaluators who did not use the scale were all significant, while after using the scale, only two evaluators got values that were not significantly different from one. Evaluation reproducibility between the evaluators ranged from 0.61 to 0.91 for the inexperienced ones and from 0.83 to 0.95 for the experienced ones. The proposed diagrammatic scale was considered appropriate to estimate the severity of PPD in cassava roots, and can be used to identify sources of tolerance to postharvest deterioration.
Thesagro:	Mandioca
NAL Thesaurus:	Shelf life Cassava
Palavras-chave:	Physiological processes Subsistence crop Tolerance
ISSN:	0100-204X
Digital Object Identifier:	10.1590/S0100-204X2015000800004
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPMF)