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International Journal of Plant Breeding and Genetics

Year: 2008 | Volume: 2 | Issue: 1 | Page No.: 9-12
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Authors

K.V. Mohanan

C.B. Mini

Keywords

Research Article

Relative Contribution of Rice Tillers of Different Status Towards Yield

K.V. Mohanan and C.B. Mini
A new rice plant type with optimum number of tillers, all productive and uniformly maturing has been suggested presently based on the study of relative contribution of tillers of different status towards grain yield. Rice germinates as a single culm and soon it starts tillering. Primary tillers are produced first, followed by secondary and tertiary tillers. Tertiary tillers are produced in high tillering varieties only. The present study has shown that they are late emerging and they flower and mature late, thus not contributing to economic crop yield. Tertiary tillers flowered only 14-29 days after the first flowering of the plants and the panicles were unripe at the time of harvest. Hence the approach should be to develop a medium tillering plant type with primary and secondary tillers emerging and flowering synchronously. Increasing the number of grains per panicle should also be a major criterion in developing a new rice plant type.
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