Study of heterosis in rice (Oryza sativa L.)

摘要

Heterosis over better parent was estimated for yield and its components in eight crosses produced in line chi tester mating design. All the crosses exhibited superiority over their respective parents for grain yield plant~(-1). Heterosis over better parent for grain yield ranged from 13.79 to 70.98 %. On the basis of high mean and high heterosis for yield and its components with earliness, cross INRC 140/ Madhuri A-9 has been identified as superior cross followed by ARC 5984/ Madhuri A-9 and Samridhi/ Madhuri A-9. These crosses may be used for heterosis exploitation.