Establishing a core collection from the integration of morpho

Abstract

The aim of this study was to establish and compare, as to their representativeness, core collections obtained
from quantitative data, multicategoric, molecular and collections that covering all this information simultaneously.
Ten subcollections were established from 67 tomato accessions of the Germplasm Bank of the Universidade Federal
de Viçosa (BGH-UFV), characterized according to 19 quantitative traits, 30 multicategoric characters, 52 ISSR loci
and to the reaction to three pathogens. These subcollections were defined by the combination of the nature of data
collected and the sampling rate. The COD-20 subcollection stood out in 20% intensity of sampling by has higher rates of
coincidence amplitude followed by more appropriate values of variance. At 30% intensity, subcollection MOL-30 was as
efficient as the subcollection COD-30 when considering only the rates of coincidence of the amplitude and the variances.
However, the graphical analysis of the variability showed a slight superiority of subcollection COD-30 in maintaining
the variability, especially regarding multicategoric characters. So whenever data from different sources are available,
should be prioritized the establishment of core collections from the integration of these data, since these were more
representative when the amplitude coefficient, variance, and retention index of variability, are regarded simultaneously.