Department of Genetics and Plant Breeding, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur 741 252.
* Present address: Biotechnology, Instrumentation and Environmental Science Unit, BCKV, Mohanpur, Nadia.
Inheritance of submergence tolerance in rice was investigated in a 10 x 10 diallel cross. A strong prepotency of parents was found in transmitting the character to their offsprings. Tolerance was dominant over susceptibility and the average dominace was within the range of incomplete dominance. Wr-vr graphic analysis suggested the involvement of both major and minor genes. Additive and non additive gene effects were highly significant. A high narrow sense heritability (71%) indicated that additive gene effects were more prominent. Parents highly tolerant to submergence also had high gca effects. The hybrids CNL31 x FR-13A, Pankaj x FR-13A, Mahsuri x FR-13A, CNL 31 x rufipogon, Pankaj x rufipogon, Mashsuri x rufipogon, IR 42 x rufipogon and CNL 31 x FR-43B appeared to be promising for incorporating an adequate level of tolerance to submergence into susceptible cultivars as indicated by their significant sca estimates.
Orym sativa L, O. rufipogon Griff, submergence tolerance, inheritance
