Indian Society of Genetics & Plant Breeding

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GENETIC STUDIES IN RICE (ORYZA SATIVA L.): INHERITANCE OF FOUR SPIKELET CHARACTERS

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Inheritance of four spikeletcharacters, viz., anthocyanin pigmentation in lemma/palea, red
awn, black hull and awning (awn formation) was studied in a cross between two upland
rice cultivars, namely, D 6-2-2 (green variety) and HY-256 Purple (purple variety). Purplish
black zones in lemma/palea, red awn and black hull characters behaved as recessive and
each segregated into a hexagenic ratio of 3 : 4093 for their presence vs. absence with the
involvement of one basic gene for the character expression and five inhibitory duplicate
genes, while awning which also behaved as a recessive trait was under the control of five
genes, of which one was basic and the other four were inhibitory duplicate genes to give a
genetic ratio of 3 : 1021 for presence vs. absence of awns. Each of these characters was
monogenic dominant in the absence of the inhibitory genes.
 

Keywords: Oryza sativa L., rice, lemma/palea, hull, awn, pigmentation, inheritance.

Info

Year: 1995
Volume: 55
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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