Heterosis breeding in hybrid rice

摘要

Two wild abortive cytoplasmic male sterile lines (IR-58025A and IR- 62829A) and fifteen restorers were evaluated in RBD under eight environments for hybrid vigour. All the hybrids exhibited significant and positive heterobeltiosis characters and standard heterosis for grain yield plant~(-1) ranging between 1.33 - 55.32 and 1.36-47.88, respectively. Heterosis for single plant yield was achieved due to positive and significant heterosis for component characters like number of seeds panicle~(-1), panicles plant~(-1), WOO seeds weight, panicle length, biological yield plant~(-1) and harvest index. The top heterotic combinations identified for grain yield plant~(-1) were IR-58025 A /IET-101351, 1R-58025 A / IET-101328 , IR-58025 A / IR-40750-82-2-2-3R and IR-62829A / IR-10198.