COMBINING ABILITY AND GENE ACTION FOR AGRONOMIC AND YIELD TRAITS OF NOVEL EGYPTIAN PHOTO THERMO-SENSITIVE GENIC MALE STERILE (PTGMS) IN HYBRID RICE | ||||
| Egyptian Journal of Plant Breeding | ||||
| Article 3, Volume 25, Issue 2, December 2021, Page 203-222 PDF (773.07 K) | ||||
| Document Type: Original research | ||||
| DOI: 10.12816/ejpb.2021.233410 | ||||
 View on SCiNiTO | ||||
| Abstract | ||||
| Studies of combining ability and gene action of newly 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 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 78and PTGMS 39 were the best general combining for grain yield and most studied traits. The testers, EJGSR 182, EJGSR 180, and Sakha Super 300 were the best general combiners among testers for grain yield and most studied traits. Eight hybrid rice combinations gave significantly positive estimates of SCA effects. The best estimates were obtained of the combinations, PTGMS 19/Sakha 104, PTGMS 78/Sakka Super 300 and PTGMS 43/Sakha Super 300. | ||||
| Keywords | ||||
| Novel PTGMS; Photo –Thermo sensitive; Two Line system; EGMS line; GCA; SCA | ||||
|
Statistics Article View: 84 PDF Download: 81 |
||||
