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Stratifying the accessions into 10 clusters showed variability among<br />

accessions brought about their distinguishing external characteristics. Component<br />

accessions per cluster and subcluster were presented in Table 9 and the morphological<br />

characters based on quantitative traits per cluster and subcluster was presented in<br />

Table 10.<br />

Cluster I is a largest group consisting of 30 homogeneous accessions. This<br />

cluster represents the majority (43.48 %) of accessions which had ratio scale traits<br />

considered to be similar enough to group them into one cluster.<br />

Cluster I was divided into 3 subclusters. Among the three, subcluster B was<br />

considered to be the most diverse with 13 accessions (18.84 %). Subcluster B<br />

represented the mixture accessions belonging to Solanum aethiopicum (1 accession)<br />

collected in Laos, S. aculeatissimum (1 accession) collected in Thailand, S. indicum (4<br />

accessions) collected in Laos, S. melongena (3 accessions) collected in Thailand and<br />

S. xanthocarpum (4 accessions) collected in Thailand and Malaysia. Subcluster B can<br />

be distinguished from the rest (subclusters A and C) by having the intermediate<br />

variability for the traits used except for number of fruit per infructescence which is the<br />

largest (1.88).<br />

Subcluster A consist of S. melongena collected in Thailand (7 accessions),<br />

Laos (3 accessions), S. aculeatissimum (1 accession) collected in Thailand and S.<br />

xanthocarpum (1 accession) collected in Thailand .The uniqueness of this subcluster<br />

is characterized by having the shortest period to germinate (6 days), the shortest<br />

cotyledon leaf length/width ratio (2.11), smallest plant breadth (83.55 cm), the least<br />

number of plant branching (9.95), the shortest leaf blade width (16.13 cm), the least<br />

number of flower per inflorescence (3.95 flowers) and the shortest period of flowering<br />

time (57.95 days). Also, it has the biggest cotyledon leaf width (8.29 mm), the longest<br />

fruit length (3.02 cm) and biggest fruit breadth (3.42 cm), the largest fruit stalk length<br />

(31.04 mm) and thickest fruit stalk (5.79 mm) when compared with the other<br />

subclusters.<br />

58

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