GENETIC CHARACTERIZATION OF NEW CMS LINES OF RICE (Oryza sativa L.) FOR THEIR POTENTIAL IN HYBRID RICE BREEDING PROGRAMME
| dc.contributor.advisor | SHIVAKUMAR, N. | |
| dc.contributor.author | DEVARAJA, C. | |
| dc.date.accessioned | 2017-06-30T05:49:40Z | |
| dc.date.available | 2017-06-30T05:49:40Z | |
| dc.date.issued | 2009-07-20 | |
| dc.description.abstract | An investigation was carried out at Zonal Agricultural Research Station, V.C Farm, Mandya during summer 2009 to study the morphological and floral characters of nine new CMS lines. Among them, KCMS 29A, KCMS 31A, KCMS 33A, KCMS 35A and KCMS 37A were promising with ideal morphological and floral traits. Using these nine CMS lines and eleven testers ninety nine hybrids were generated and when evaluated based on spikelet fertility of corresponding hybrids, the testers MSN-62, MSN-20-13, MSN-63, MSN-64 and MSN-68 were identified as good maintainers while, KMR 3, KMR 4 and MSN 67 as good restorers. Analysis of variance for combining ability indicated that, the CMS lines KCMS 33A, KCMS 37A and CRMS 31A, and the testers KMR-3, KMR-4 and MSN-67 had high overall GCA. Higher magnitude of SCA compared to GCA indicated the predominance of non-additive gene action for all the nine traits under study. The conditional probability of a cross having high overall sca status was 0.39 when both parents had high gca effect and when one of the parents had high gca effect it was 0.34. The per cent contribution of testers was more compared to CMS lines towards the expression of traits like seed yield per plant (54.44), plant height (48.54), grain L/B ratio (42.74) and 1000 grain weight (42.11). Six hybrid combinations with better specific combining ability exhibited significantly high standard heterosis over the check hybrid KRH 2 for seed yield per plant. They were KCMS 31A/KMR-3 (46.35%), CRMS 31A/KMR-3 (29.58%), KCMS 33A/KMR-4 (29.30%), CRMS 31A/KMR-4 (13.14%), KCMS 34A/Thanu (12.00%) and KCMS 37A/Thanu (9.54%). | en_US |
| dc.identifier.other | Th-9521 | |
| dc.identifier.uri | http://krishikosh.egranth.ac.in/handle/1/5810023811 | |
| dc.language.iso | en | en_US |
| dc.pages | 173 | en_US |
| dc.publisher | University of Agricultural Sciences GKVK, Bangalore | en_US |
| dc.sub | Genetics and Plant Breeding | en_US |
| dc.subject | null | en_US |
| dc.theme | CHARACTERIZATION OF NEW CMS LINES OF RICE | en_US |
| dc.these.type | M.Sc | en_US |
| dc.title | GENETIC CHARACTERIZATION OF NEW CMS LINES OF RICE (Oryza sativa L.) FOR THEIR POTENTIAL IN HYBRID RICE BREEDING PROGRAMME | en_US |
| dc.type | Thesis | en_US |