Indian Society of Genetics & Plant Breeding

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GENETIC ANALYSIS OF GRAIN NUMBER, GRAIN WEIGHT AND GRAIN YIELD IN RICE (ORYZA SATIVA L.)

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In a cross of Begunbuchi and IRAT 102 varieties of rice having extreme variations for
numberofgrains and 1000-grain weight,additive and additive x additive interaction effects
were found important in the inheritance ofgrains/panicle and 100D-grainweight. However,
grain yield was predominantly governed by dominance effects and additive Xdominance
and dominance X dominance interaction effects. Complementary type epistasis was
observed for grains/panicle and l000-grain weight, while duplicate type epistasis was
prominent for grain yield. The midparent heterosis was maximum (29.30/.) for grain
yield/plant. Appropriate breeding methodologies for the exploitation of various type of
gene effects observed in the present study are discussed.
 

Keywords: Genetics, grain number, grain weight, grain yield, rice.

Info

Year: 1993
Volume: 53
Issue: 3
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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