A METHODOLOGY OF GENETIC-DIVERGENCE ANALYSIS BASED ON SAMPLE UNIT PROJECTION ON 2-DIMENSIONAL SPACE

A methodology for the assessment of the dissimilarity among sample uni ts (varieties, lines, etc.) in dispersion graph was presented. The coo rdinate of each unit was calculated from a dissimilarity matrix, adopt ing the criteria of minimizing the differences between the original di stances calculated in the p-dimensional space (p > 2) and the two dime nsional space distances. A comparison was made between the proposed me thodology, canonic variables and principal components techniques. It w as slightly superior in expressing genetic dissimilarity among cultiva rs.