Author(s):

Ruth Elizabeth Ekka, AK Sarawgi and RR Kanwar

Abstract: The inheritance and allelic relationships of genes governing resistance to the brown plant hopper (BPH) was studied in six resistant donors of rice viz, R-RF-55, R1600-1124-2-618-1, R1546-1328-1-90-1, R1677-3473-1-4301-1, R1470-347-136-1-1 and R1670-3267-1-3920-1, in greenhouse condition. The present investigation was conducted at Department of Genetics and Plant Breeding, College of Agriculture, Indira Gandhi Krishi Vishwavidyalaya, Raipur during 2009-2011. Based on the results obtained in F₁ through F₃ generations, BPH resistance was governed by single dominant gene in R-RF-55 and single recessive gene in R1546-1328-1-90-1. Two independent dominant genes for resistance were observed in R1600-1124-2-618-1. Allelic test revealed that dominant gene of R1470-347-136-1-1 and R1670-3267-1-3920-1 while recessive gene of R1677-3473-1-430-1 were non-allelic to the genes bph5 (ARC10550) and bph7 (T12). Also, dominant gene of R1470-347-136-1-1 and R1677-3473-1-4301-1 was found non allelic to Bph1 (MTU15) and Bph6 (Swarnalata), respectively. The identification of independent genes would be helpful in pyramiding resistant genes to stabilize resistance.

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