Predicted plotted against observed TCC in the calibration set, intact root samples, NRCRI 2015.

<p>Predicted plotted against observed TCC in the calibration set, intact root samples, NRCRI 2015.</p

Carotenoids calibrations from mashed (a) and intact (b) root samples from CIAT using the same sample size (n = 66).

<p>Carotenoids calibrations from mashed (a) and intact (b) root samples from CIAT using the same sample size (n = 66).</p

Descriptive statistics for model calibrations and independent set validations for DMC, TCC and ATBC using mashed root samples from CIAT, 2016.

<p>Descriptive statistics for model calibrations and independent set validations for DMC, TCC and ATBC using mashed root samples from CIAT, 2016.</p

Independent validation of models for DMC, TCC and ATBC.

<p>Independent validation of models for DMC, TCC and ATBC.</p

Validation using different calibration sets on intact and mashed root samples for DMC.

<p>Validation using different calibration sets on intact and mashed root samples for DMC.</p

Correlations among the different DMC methods.

<p>Correlations among the different DMC methods.</p

Calibration assessments of DMC from different calibration sets on mashed (a.) and intact (b.) root samples for DMC.

<p>Calibration assessments of DMC from different calibration sets on mashed (a.) and intact (b.) root samples for DMC.</p

The effect of mathematical pre-treatments on models from different calibration sets.

<p>The effect of mathematical pre-treatments on models from different calibration sets.</p

Predicted plotted against observed TCC in the calibration set, mashed samples, CIAT 2016.

<p>Predicted plotted against observed TCC in the calibration set, mashed samples, CIAT 2016.</p

The distribution of cultivated (<i>Bactris gasipaes</i> var. <i>gasipaes</i>, triangles) and wild (var. <i>chichagui</i>, dots) peach palm observation points.

<p>The points used only for modelling and gathered from sources other than this study are reported in blue and green, whereas the points referring to samples used in this study are shown in red or yellow, depending on the additional analyses carried out on each (genetic or phenotypic characterization). The red, blue and green polygons show the approximate distribution of <i>Bactris</i> wild types [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144644#pone.0144644.ref020" target="_blank">20</a>]; the grey lines divide the different regions of Amazonia (NWA: north-western Amazonia, GS: Guyana shield, EA: eastern Amazonia, CA: central Amazonia, SA: southern Amazonia, SWA: south-western Amazonia; after [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0144644#pone.0144644.ref034" target="_blank">34</a>]).</p