Genetics of Resistance to Brown Planthopper in Rice and Association of Certain Plant Characters with Resistance
Abstract
Studies on the genetics of resistance to brown planthopper (Nilaparvata lugens Stal.) in rice (Oryza sativa L.) at the All-India Coordinated Rice Improvement Project, Hyderabad (India), indicated that resistance is controlled by a single dominant gene in the cultivars, ARC10550. ARC14988, ARC15570A, ARC15680, and ARC15831; a single recessive gene in the cultivars. ARC10S99, ARC14394, ARC15608, ARC15694, PTB21, MR1523 Umsum, Malalwariyan, and Leb Mue Nahng; and duplicate dominant genes in the cultivars, ARC6650, ARC7080, ARCH354, ARC14529A, ARC14636A, ARC14766, ARC14771. ARC15872, PTB33, and Luangu. The susceptible parents used in the crosses were TNI, Jaya and RP633–519.
In the progenies of the cross TNI/PTB33, resistance to the brown planthopper did not show any association with flowering duration, plant height, number of ear-bearing tillers, hull colour, and grain yield per plant. However, a significant association was observed between red pericarp colour and resistant reaction.
