Inheritance study on jassid (Amrasca biguttula biguttula) tolerance in F2 population of upland cotton (Gossypium hirsutum L.)

Abstract

India is one of the largest producers of cotton in the world, but the productivity of cotton is comparatively low. One of the major factors limiting the productivity in cotton is pest infestation. Earlier cotton production was inhibited by the boll worms which is now coped up with Bt cotton but sucking pest infestation is still a prime concern. This study was conducted in the F2 population of four upland crosses- TVH002 x RAHC1039, TCH1894 x NDLH32, CO17 x KC2 and TVH002 x KC3, which were evaluated for the inheritance pattern of jassid tolerance. Three of the four crosses segregated in 3:1ratio (Resistant, susceptible) and the fourth cross segregated in 13:3 ratio (Resistant, susceptible), showing digenic interaction. Further molecular investigation is essential to confirm this pattern of inheritance and progress the work in this direction.