Tolerance of rice varieties for stagnant flooding [West Bengal]
1986
De Datta, S.K.
The performance of several rice varieties under stagnant flooding in West Bengal was studied. The 577 entries broadcast seeded in a lowland field showed striking difference in survival and grain yield. Sudden submergence at the seedling stage adversely affected seedling survival, yield and yield components of surviving entries. Of 156 entries that flowered, 21 produced sterile panicles. No panicles were produced by 136 entries. Only Gerikalma showed good survival, grain yield and yield components with low grain sterility. SR26B showed the least sterility, and Bhimsail produced the highest number of fertile grains/panicle. Bhimsail and Hamai gave maximum grain yield/plant. Flood-resistant varieties failed to grow well under stagnant flooding. Flood-resistant and lowland varieties performed differently. The study suggests that tolerance of varieties for stagnant flooding is influenced by a combination of environmental, genetic and physiological factors.
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