الفهرس | Only 14 pages are availabe for public view |
Abstract The present study entiteled ”Inheritance of Photo Thermo Sensitive Genic Male Sterility in hybrid rice under Egyptian conditions” was under taken to study the magnitude of genotypic variation, both general and Specific combining abilities, estimate the genetic behavior and potentiality of heterosis expression for new developed Photo-Thermo sensitive genic male sterile lines (PTGMS) and six exotic and novel Egyptian testers of new plant types were estimated using Line x tester analysis for some agronomic and yield traits to get useful information for two line system hybrid rice in Egypt. Significant differences of GCA among PTGMS lines and testers for all agronomic and yield studied traits. Highly significant differences of line x tester (SCA) for all the studied traits, indicated that they interacted and produced markedly different combining ability effects. The estimates of variances due to GCA were higher than that due to SCA for all traits indicating the predominance of additive gene action in the inheritance of all these traits. Heritability estimates in narrow sense (h2n) were high for all traits studied. Among the five PTGMS lines, PTGMS 78 and PTGMS 39 were the best general combiners for grain yield and most studied traits. while among the male parents (testers), EJGSR 182, EJGSR 180, and Sakha Super 300 were the best general combiners among testers for grain yield and most studied traits. |