Abstract

Nine F₁ hybrids were obtained from crossing between three maintainer lines, CA1445, CA1449 and CA1450 and three restorer lines, CA683, CA1447 and CA1448. The hybrids were significantly different in yield and agronomic performance by using DMRT. The F₁ hybrids CA1450 × CA1447 and CA1450 × CA1448 gave the highest yield while different statistically significant from each other in terms of yield levels differed at statistically significant level in this productivity performance when compared with their female parents, male parents and YokSiam variety but not differ statistically significant when compared with JomThong 2 and Jakkrapat varieties. The F₁ hybrid CA1450 × CA1448 showed positive heterosis in terms of fruit weight per plant, the number of fruit per plant, fruit weight, fruit width, fruit length and pericarp thickness while F₁ hybrid CA1450 × CA1447 expressed positive heterosis in fruit weight per plant, the number of fruits per plant, fruit weight, fruit length and pericarp thickness. The general combining ability of the female parent, CA1450, was good for five characteristics. The male parent, CA1447 was good for five characteristics.

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