Heterosis Studies in Hybrid Rice (Oryza sativa L.)

To increase production and productivity in this ecosystem, innovative breeding approaches such as heterosis in hybrid rice. Out of these, hybrid rice technology is the proven technology in China and a more practical one to raise production. Hetrosis study comprises of three CMS lines viz., CRMS 31A, IR 58025A and IR79156A and five testers viz., NPT 453-2, NDR 8054 (IR 77768-25-NDR-B-108-14) , CR 2330-3-3-2-1-1, NPT 76-8 and PR-115. Indira Sona (hybrid) and Mahamaya (commercial cultivar) . The crosses were tested as line x tester mating design with two replications. Cross IR 79156A / NPT 76-8 stood for positive significant heterosis over checks for characters grain yield / plant, test weight, pollen fertility percentage, harvest index.