EFFECTS OF CHRONIC GAMMA RADIATION IN RICE (ORYZA SATIVA L.)

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Transactions of the Bose Research Institute (Calcutta) (India)

OSTI ID:4639607

Basu, A K

Patnai, a pure-line winter variety of rice (Oryza sativa L.), was exposed to continuous or chronic gamma irradiation from a 20-C Co/sup 60/ source in attempts to induce genetical changes. The plants, which were grown from germination to maturity in the gamma field, received four doserates of 54.4, 6.1, 2.2, and 1.1 r/day of gamma rays. The control was grown away from the source in a zone that received no radiation. In plant height, number of tillers per plant, and mean time of flowering there was not much variation. However, there was stimulation in the number of flowers per panicle in all the dose-rates. Seed fertility was impaired. The gamma /sub 2/ had no variation except that one of the irradiated panicle progenies segregated for a chlorophyll mutant. The gamma /sub 2/ panicles segregated for chlorophyll mutations like albino, xantha, and virescent in the gamma /sub 3/ generation, which indicates that mutations were induced at a stage later than the separation of male and female organs of gamma / sub 1/ flowers. The mutation rate increased with increasing dose-rates of gamma radiation. (auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-035578
• OSTI ID: 4639607
• Journal Information: Transactions of the Bose Research Institute (Calcutta) (India), Journal Name: Transactions of the Bose Research Institute (Calcutta) (India) Vol. Vol: 25; ISSN TBICA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
CEREALS
CHLOROPHYLL
COBALT 60
COLOR
GAMMA RADIATION
GENETICS
MUTATIONS
PLANTS
POPULATIONS
RADIATION DOSES
RADIATION EFFECTS
RICE
SEEDS
SEX