Indian Society of Genetics & Plant Breeding

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NATURE OF GENETIC CONTROL OF SUBMERGENCE TOLERANCE IN RICE

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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 CNL~1 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.
 

Keywords: Orym sativa L., O. rufipogon Griff, submergence tolerance, inheritance.

Info

Year: 1998
Volume: 58
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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