Line x tester analysis for deducing heterosis in rice (Oryza sativa L.)

An experiment consisting of twelve genotypes (four lines and eight testers) along with their thirty-two crosseswas conducted in Line x Tester design to study the heterobeltiosis and standard heterosis for grain yieldper plant and its component traits in rice at Main Rice Research Centre, Navsari. The result indicated that significant heterosis in a desirable direction was observed in all the characters except days to 50% flowering where none of the crosses showed significant heterobeltiosis in a negative direction for this trait. The best heterobeltiosis and standard heterosis for grain yield per plant was exhibited by the cross NVSR-453 x NVSR-475 followed by Gurjari x NAUR-1 and NVSR-453 x NVSR-409