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STUDIES ON RADIATION-INDUCED MUTATIONS IN SOME VARIETIES OF RICE
Abdul Jalil Miah, I. M. Bhatti and Afsar Awan
Abstract: Dry seeds of two standard local varieties of rice namely, Dokri Basmati
and Jajai-11 were subjected to different dosages of gamma-rays and fast
neutron. Data on the seed fertility of the M\ generation plants
indicated that Jajai-11 is more radio-resistant than Dokri Basmati.
Chlorophyll deficient and viable mutations were scored in the M2
generation. In general the mutation rates increased with the increase in
dosages of radiations. In both the varieties, the highest frequency of
chlorophyll mutations induced by either neutron or gamma-ray treatments,
was obtained for albina followed by viridis type. In Dokri Basmati the
spectrum of viable mutations was restricted to one type only. In
Jajai-11, on the other hand, the viable mutant types included a wide
variety of variants totalling to seven types.
Atomic Energy Agricultural
Research Centre, Tandojam
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