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THESIS

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This cluster can be divided into two subclusters using leaf blade lobbing. Between the<br />

two, subcluster A was considered to be the most diversity with 4 accessions (5.80 %).<br />

Subcluster A consisted of S. aculeatissimum (1 accession) collected in Thailand,<br />

S. melongena (2 accessions) collected in Thailand and S. xanthocarpum (1 accession)<br />

collected in Thailand. Subcluster A is characterized by having intermediate leaf blade<br />

lobbing. Subclaster B consisted of S. melongena (1 accession) collected in Thailand<br />

and one accessions of S. xanthocarpum collected in Cambodia. This subcluster is<br />

characterized by having weak leaf blade lobbing.<br />

Cluster III: the third cluster is a mixture of one accession, belonging to S.<br />

aethiopicum collected from Laos and 3 accessions belong to S. trilobatum collected<br />

from Thailand. Cluster III can be distinguished from the rest by having the prostrate<br />

plant growth habit, poppy red fruit at physiological maturity and very loose fruit flesh<br />

density. This cluster can be divided into 2 subclusters. Subcluster A (S. aethiopicum)<br />

that can be distinguished from subcluster B (S. trilobatum) by having the intermediate<br />

plant growth habit, the broader than long fruit length and breadth ratio, yellow orange<br />

fruit at physiological maturity, loose (crumbly) fruit flesh density and very low yield<br />

per plant.<br />

Cluster IV: the forth cluster is represented by only one accession (TS01447-<br />

A). This accession belonged to S. viarum, collected from Thailand. This cluster<br />

formed its own, separated itself from the rest of the stratified clusters. It could be<br />

recognized from the rest as it is having the very strong leaf blade lobbing, the acute (~<br />

45°) of leaf blade tip angle, intermediate yield per plant and brown black seed.<br />

Cluster V: the fifth cluster is a group of 10 accessions which is homogenous,<br />

belong to S. torvum, collected from Thailand, Laos, Cambodia and Malaysia. This<br />

account for the 14.49 % of the total accessions stratified. It is separated from the other<br />

cluster because the fruit color is still green at ripening stage. This cluster can be<br />

divided into two subclusters using the seed color. Between the two, subcluster A was<br />

considered to be the most diverse with 7 accessions (10.14 %). Subcluster A consisted<br />

of S. torvum collected in Laos (3 accessions), Cambodia (1 accession) and Malaysia<br />

69

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