Genetics of brown plant hopper (Nilaparvata lugens Stal.) resistance in elite donors of rice (Oryza sativa L.)

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.