Rice ratooning: breeding, agronomic practices, and seed production potentials
1988
Mahadevappa, M. | Yogeesha, H.S. (Agricultural Sciences Univ., Bangalore (India). Dept. of Seed Science and Technology)
Except in the Dominican Republic and Texas, USA, no special efforts have been made to develop varieties suitable for a rice ratoon cropping system. Varieties observed to possess good ratooning ability were selected incidentally from material screened for other characteristics. Systematic study on the genetics of ratooning ability and related characters has not been done. Disease resistance is important. Available information on selection criteria in breeding for ratoon rice is discussed. Agronomic practices, such as managing the main crop in a way suitable for the whole system, stubble height at main crop harvest, water management under different planting and soil conditions, and fertilizer management, have not been developed for particular situations. A few articles report contradictory results on ratoon grain and seed quality. Possibilities of producing quality seed, maintaining CMS [cytoplasmic male sterility] lines, synchronizing female and male parents and reducing the cost of hybrid seed production using ratoon crops are discussed. Needed location-specific research on potentials of this system in breeding, agronomic practices and seed production are indicated.
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