Indian Society of Genetics & Plant Breeding

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GENETIC ANALYSIS OF RESISTANCE TO BACTERIAL BLIGHT (XANTHOMONAS ORYZAE pv. ORYZAE ISHIYAMA) IN SOME RICE (ORYZA SATIVA L.) LINES

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Genetics of resistance to a local isolate of Xanthomonas oryzae pv. oryzae causing bacterial
blight was studied in four lines of rice (Oryza sativa L.) namely DR 285-5-6- 6-2, DR
319-1-HR28, lET 8584 and lET 8585. Resistance of lET 8585 was controlled by two dominant
independently inherited genes, while in the remaining two lines resistance was conferred
by one dominant and one recessive gene each. Reaction of F2 populations iii intercrosses
of resistant stocks showed that one of the dominant genes of lET 8585 is allelic to the
dominant gene of DR 285-5-6- 6-2, DR 319·1-HR28 and lET 8584. The resistance gene(s) of
lET 8584 were nonallelic to the gene(s) of DR 285-5-6-6-2 and DR 319- 1-HR28. In all, two
dominant and two recessive genes were postulated to be conferring resistance in these four
rice lines.
 

Keywords: Rice, Oryza sativa, resistance, bacterial blight, Xanthomonas oryzae pv. oryzae

Info

Year: 1996
Volume: 56
Issue: 2
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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