The High Resistance and Its Inheritance of 94-42-5-1, a Source Derived from Oryza rufipogon to Brown Planthopper, Nilaparvata lugens

The characteristics and inheritance for resistance to brown planthopper, Nilaparvata lugens (BPH) of 94 42 5 1, derived from Oryza rufipogon have been studied. Results showed that 94 42 5 1 had very high and broad spectrum resistance to BPH biotype 2, biotypes Pantnagar (India) and Cuulong (Vietnam). The latter two biotypes are highly virulent to rice. The line 94 42 5 1 was highly resistant to all the three BPH biotypes and higher than any other tested varieties with known resistance genes used. It is one of the high BPH resistance resources with AA genome. Inheritance analysis showed that the resistance of 94 42 5 1 to Cuulong biotype was conferred by two recessive genes with duplicate nature and one single recessive to Pantnagar biotype.