Posada H. auteur aut IRD Ferrand M. auteur aut IRD Davrieux F. auteur aut IRD Lashermes Philippe auteur aut IRD Bertrand B. auteur aut IRD text journalArticle eng text/pdf born digital access Previous study on food plants has shown that near infrared (NIR) spectral methods seem effective for authenticating coffee varieties. We confirm that result, but also show that inter-variety differences are not stable from one harvest to the next. We put forward the hypothesis that the spectral signature is affected by environmental factors. The purpose of this study was to find a way of reducing this environmental variance to increase the method's reliability and to enable practical application in breeding. Spectral collections were obtained from ground green coffee samples from multi-location trials. Two harvests of bean samples from 11 homozygous introgressed lines, and the cv 'Caturra' as the control, supplied from three different sites, were compared. For each site, squared Euclidean distances among the 12 varieties were estimated from the NIR spectra. Matrix correlation coefficients were assessed by the Mantel test. We obtained very good stability (high correlations) for intervariety differences across the sites when using the two harvests data. If only the most heritable zones of the spectrum were used, there was a marked improvement in the efficiency of the method. This improvement was achieved by treating the spectrum as succession of phenotypic variables, each resulting from an environmental and genetic effect. Heritabilities were calculated with confidence intervals. A near infrared spectroscopy signature, acquired over a set of harvests, can therefore effectively characterize a coffee variety. We indicated how this typical signature can be used in breeding to assist in selection. specialized NIRS coffee heritability chemometric selection 076 102 2 113-119 2009 0018-067X https://www.documentation.ird.fr/hor/fdi:010053045 10.1038/hdy.2008.88 0018-067X [F B010053045] https://www.documentation.ird.fr/hor/fdi:010053045 https://www.documentation.ird.fr/intranet/publi/2009/compl3/010053045.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2011-03-23 2017-08-23 fdi:010053045 fre