Abstract

An experiment was conducted to identify rice hybrids for aerobic condition based on yield and yield associated traits. None of the hybrids showed desirable performance for all the traits studied. Water deficit under aerobic condition decreased the pollen fertility and increased spikelet sterility under aerobic conditions. However, five hybrids viz., IR 68885A / IR 73718-3-1-3-3, IR 67684A / CT-6510-24-1-2, IR 70372A / PSBRC 80, IR 70372A / IR 73718-3-1-3-3 and IR 70369A / IR 73718-3-1-3-3 maintained high pollen /spikelet fertility and recorded higher yield under aerobic conditions. Expression of desirable genes for pollen/spikelet fertility under stress is a desirable trait and these genotypes can be better utilized under aerobic conditions.

Keywords: Rice hybrids, Aerobic condition, Pollen fertility, Spikelet fertility.