Studies on linkage relations of genes controlling disease and insect resistance and nature of endosperm in rice

Abstract

Five hundred F₃ lines derived from the cross TN1/IR2061-464-6 were examined for the nature of endosperm and resistance to bacterial blight, brown planthopper, and grassy stunt. TN1 has non-glutinous endosperm and is susceptible to bacterial blight, grassy stunt, and brown planthopper. IR2061-464-6 has a glutinous endosperm and is homozygous resistant to bacterial blight, grassy stunt, and brown planthopper. The F₃ data fit the 1:2:1 ratio expected for monogenic control of each trait. A two-way classification for all the traits indicated that these four traits are inherited independently. Thus, it should be possible to recombine these four traits in various combinations in rice varieties.