Principal Component and Cluster Analysis as a Tool in the Assessment of Tomato Hybrids and Cultivars

Table 6

Loadings of the traits onto three principal components for cultivars.

Traits	Principal components (PCs)
	1	2	3
Commercial fruit number (fruit/plant)	0.9922	0.0746	0.0998
Commercial fruit yield (g/plant)	0.9460	−0.3067	−0.1049
Total fruit number (fruit/plant)	0.9762	0.2104	0.0526
Total fruit yield (g/plant)	0.9644	−0.1076	−0.2417
Early fruit number (fruit/plant)	0.9932	0.1163	0.0078
Early fruit yield (g/plant)	0.9786	0.0654	−0.1953
Polar diameter (cm)	−0.9024	−0.3857	−0.1921
Equatorial diameter (cm)	−0.6150	−0.3445	−0.7093
Ribbing	−0.3099	0.9473	0.0806
Size of blossom scar	−0.5799	−0.5556	0.5959
Green shoulder	−0.9522	−0.1928	−0.2368
Firmness (kg/m^2)	−0.3578	−0.9312	0.0698
Locule number	0.7823	0.1656	−0.6005
Pericarp thickness (cm)	−0.0446	−0.6652	−0.7454
Core thickness (cm)	−0.5463	−0.7042	−0.4535
TSS	−0.7018	−0.6972	0.1461
TS	−0.7828	−0.6024	0.1561
Ph	−0.9947	0.0188	−0.1012
Internode length (cm)	−0.1239	0.8627	−0.4903
Internodes 1st–4th inflorescence	−0.8366	−0.4890	−0.2469
Number of clusters at topping	0.5319	0.7965	0.2875
Leaf length (cm)	−0.9012	0.4137	0.1289
Leaf width (cm)	−0.8088	0.5348	0.2445
Leaflet length (cm)	−0.7053	0.3463	−0.6185
Leaflet width (cm)	−0.9029	−0.2407	0.3560
𝑋/s of yield^a	0.9810	0.0242	0.1925
Heterosis	0.9133	−0.4049	−0.0437
Heterobeltiosis	0.7970	−0.6032	−0.0314
SCA of yield	0.9638	−0.2637	0.0406
GCA of yield	0.9548	−0.2633	−0.1375
𝑋/s of early yield^a	0.2778	0.4361	−0.8560
Heterosis of early yield	0.9165	−0.3944	0.06744
Heterobeltiosis of early yield	0.8113	−0.5667	0.1436
SCA of early yield	0.9352	−0.3404	0.0973
GCA of early yield	0.9779	−0.2037	−0.0467

^aStability of performance (𝑋/s).