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Bibliographic Data
Control Number45604
Date and Time of Latest Transaction20150409034245.AM
General Information150409s |||||||||b ||00|||
Cataloging SourcePNRI-DOST
Local Call NumberFil. Thesis QK757 .G3 1983
Main Entry - Personal NameGarcia, Nardo Quinto
Title StatementAgronomic variability in two rice varieties induced by gamma irradiation by Nardo Quinto Garcia
Physical Descriptionxi,77 leaves ill. 28 cm
Summary, Etc.Seeds of IR 52 and Red Rice were exposed separately to 25,30 and 35 kilorads of Co-60 gamma rays. Control seeds were used for comparison. The agronomic parameters that were significantly affected by the different doses of gamma irradiation in the M1 generation were : decreased percentage germination in Red Rice from 6% to 42%, shortening of seedling height from 3% to 8% in IR 52 and in Red Rice from 4% to 10%. Heading dates of IR 52 was delayed from 6% to 11% and 3% to 11% for Red Rice. Number of filled grains of IR 52 was decreased from 12% to 70% and for the Red Rice was from 45% to 288%. Increased in the number of unfilled grains for IR 52 and Red Rice was from 26% to 61% and 96% to 288%,  respectively. The frequency of chlorophyll mutations in the M2 generation was recorded high in IR 52 at 35Kr dose while in the Red Rice, the highest was obtained at 30 kr. The main types of chlorophyll mutations observed in the M2 progenies were albina, xantha, chlorine, virescent and striata. In IR 52 the total percentage of viable and lethal mutations were 118.67% and 181.93% respectively. In the case of Red Rice the total percentage of viable mutations were 92.61% and 207.37% for lethal mutations. Albina and xantha are lethal types while chlorina, virescent and striata are viable chloriophyll mutations. No chlorophyll mutation was noted in the control plants
Subject Added Entry - Topical TermPlants, Effect of gamma rays on -- Rice -- Philippines -- Thesis
 Rice -- Varieties -- Philippines -- Thesis
 Plant mutation -- Effect on rice -- Philippines -- Thesis
LocationDOST PNRI QK757 .G3 1983 (Fil.) 418 1 C 0000-00-00
  
     
 
Physical Location
Department of Science and Technology
Philippine Nuclear Research InstituteQK757 .G3 1983
  
     
 
Digital Copy
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