LINE BY TESTER ANALYSIS FOR YIELD AND YIELD COMPONENTS IN HYBRID RICE

EL-Diasty, Z. M.; EL-Mowafi, H. F.; Hamada, M. S.; Belih, E. M.

doi:10.21608/jpp.2008.171560

LINE BY TESTER ANALYSIS FOR YIELD AND YIELD COMPONENTS IN HYBRID RICE

Document Type : Original Article

Authors

¹ Genetics Dept., faculty of Agric., Mansoura University, Egypt.

² Rice Res. And Training Center (RRTC), Sakha, Kafr EL-Sheikh, Egypt.

³ Genetics Dept., faculty of Agric., Damietta Branch, Mansoura University, Egypt.

⁴ 1- Genetics Dept., faculty of Agric., Mansoura University, Egypt. 2- Rice Res. And Training Center (RRTC), Sakha, Kafr EL-Sheikh, Egypt.

10.21608/jpp.2008.171560

Abstract

This study was conducted to investigate combining ability and gene action of rice hybrids and their parental lines. Four CMS lines as female parents and three restorers' lines as male parents were hybridized to produce 12 F₁ hybrids were used in a line x tester mating design. the resulted genotypes were used to estimate combining ability, heterosis, and gene action for yield and yield components characters. The results indicated that most characters were largely governed by additive gene action. General and specific combining ability effects of the genotypes for the characters under study were estimated. The results showed that the characters were controlled both general combining ability (GCA) and specific combining ability (SCA) . The CMS and restorer lines showed variable effects for GCA. The study also indicated the presence of heterosis over the better parent (BP), Mid-parents (MP) and over the best check variety Giza 178 for nine characters of yield and yield components.