Development of Male Sterile Green Chili Lines by Backcross Method

Abstract

This experiment focus on development of green chili lines which is male sterile by backcross method of chili varieties CA1445 and CA1450. They were crossed with male sterile varieties KY16 and PP32. The study revealed that prospective genotypes, CA1445 and CA1450 varieties, were maintainer and stable. It was found that the F1 hybrid (KY16BC₃F₁CA1445 x CA1448) gave the highest yield and fruit weight per plant. The second high yielding varieties were F1 hybrid (KY16BC₃F₁CA1450 × CA1448) and commercial variety (MAEPING 80). Yields of the three varieties were not significantly different. The yields of these varieties were significantly difference from others F1 hybrids, the female parents, and male parents. However; they were not significantly different from the female parent CA1447 and commercial variety (JAKRAPAT). The female parent KY16BC₃F₁CA1450, KY16BC₃F₁CA1445, PP32BC₃F₁CA1450 and PP32BC₃F₁CA1445 showed positive and significantly different of general combining ability for fruit number per plant, fruit weight, fruit length and fruit width. The male parent CA1447, CA1448 and CA1449 showed positive and significantly different of general combining ability for fruit number per plant, yield, fruit weight per plant and fruit length.  Many of F1 hybrids exhibited positive significantly different heterosis for yield, number per plant, fruit weight, fruit width, and fruit length. The F1 hybrids, KY16BC₃F₁CA1445 × CA1448 and PP32BC₃F₁CA1445 × CA1448 could be used in the future for the F1 hybrid development program.