Abstract

Determination of heterosis in maize hybrids is necessary for their commercial exploitation. Data derived from several experiments, namely, Coordinated Varietal Trial-Hybrid (CVTH), Diallel Crosses, Observation Nurseries (OBN), Top Crosses and Test Crosses conducted at Rampur (Chitwan) and Parwanipur (Bara), Nepal were complied to determine heterosis and identify high yielding hybrids. The maize hybrids, namely, RML-4/RML-7, RML-5/NML-1, NML-2/RML-6, RML-6/RML-7, RML-5/RL-47, RML-8/RL-47, RML-5/RML-8, NML-1/RML-17, RML-7/RML-18, RML-6/RML-18 and RML-5/NML-1 produced high heterosis (greater than 40%) indicating these hybrids superior for commercial cultivation.