Abstract
MARKED vigour has been observed in rice by a number of workers in the F1 generation of many crosses in respect of height, number of ear-bearing tillers, number of spikelets and yield. But it has not been possible to exploit this phenomenon, as hybrid seed production is a limiting factor in this crop. One method of taking advantage of the hybrid vigour might be to multiply the F1 plants vegetatively. The technique of vegetative propagation in rice varieties which possess perennating habit has been studied intensively at the Central Rice Research Institute from 1959 onwards. Its value has now been established as an aid to increased rice production. The great potentiality of this technique is shown by the fact that all the clones to be planted in an acre have been derived by repeated multiplication of the tillers produced from two to three stubbles (clones) of the preceding crop. The number of repeated multiplication (3–6 times) depends on the nature of rice variety utilized. The increased yield, obtained by this procedure, ranged from 17 to 61 per cent, as compared with crops raised from normal rice seedlings.
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RICHHARIA, R. Clonal Propagation as a Practical Means of Exploiting Hybrid Vigour in Rice. Nature 194, 598 (1962). https://doi.org/10.1038/194598a0
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DOI: https://doi.org/10.1038/194598a0
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