The first 2 axes were retained for principal component
analysis (PCA) because they express better total
variability of the plant material (55.74%). The
contributions of each discriminating trait are listed in
Table 5. Axis 1 (42.06%) is defined by Hmat, S_fert, Ppb,
LL and LW, T60, M and Npl traits. These variables
express the vegetative and reproductive characters of the
varieties. This axis contrasts varieties with long, wide
leaves, abundant primary branching with dense panicles
to those having short leaves and very dense and
compact panicles. It