THESIS

Subcluster C consisted of 2 accessions of S. indicum and one accession of S.
viarum collected in Laos, one accession of S. mammosum collected in Malaysia and 2
accessions collected in Thailand. This subcluster was separated from the other
subcluster by taking the longest time to germinate (7.33 days), the largest
cotyledonous leaf length/width ratio (2.35), the biggest plant breadth (96.33 cm), the
largest number plant branching (10.50), the bigggest leaf blade width (21.29) and the
longest period of flowering time (72.83 days). Furthermore, it has the shortest fruit
breadth, only 3.00 cm diameter of the broadest part of the fruit. Also, it has the
shortest fruit stalk length (15.25 mm) and fruit stalk thickness (3.88 mm) and the
smallest 100 seed weight (0.43 g).
By virtue of their morphological characteristics, these 4 subclusters were
related to each other. All of their component accessions exhibited nearly
homogeneous ratio traits. This included the cotyledon leaf width, cotyledon leaf
length and width ratio, leaf blade width and 100 seeds weight from which the
differences in their ranges were at proximity. Cluster I, association of the accessions
would be mean intermediate variability for the traits used. More likely, this would be
suggested that their morphological characters were nearly similar even if they were
different species and taken from different parts of Southeast Asia.
Cluster II: the second cluster accounting for 5.80 % of the total accessions,
consisted of 2 accessions of S. melongena collected in Thailand and Laos and 2
accessions of S. xanthocarpum collected in Thailand and Cambodia. The uniqueness
of this cluster is characterized by having the longest fruit stalk length (37.45 mm) and
the most of fruit stalk thickness (5.70 mm).
Cluster III: the third cluster covers the 4 accessions (5.80 %). Cluster III
consists of 3 accessions of S. melongena collected in Thailand (2 accessions) and
Vietnam (1 accesion) and only one accessions of S. sanitwongsei collected in
Thailand. The characteristic traits of this cluster include the shortest period to
germinate (6.50 days), the least number of flowers per inflorescence (5.50), the least
period of flowering time (57.75 days) and the least number of fruit per influctescence
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