Physico‐chemical mechanisms of resistance to shoot fly, Atherigona soccata in sorghum, Sorghum bicolor uri icon

abstract

  • Sorghum shoot fly, Atherigona soccata is an important pest of sorghum,and host plant resistance is one of the important components for minimizingthe losses due to this pest. Therefore, we evaluated a diversearray of sorghum genotypes to identify physico-chemical characteristicsconferring resistance to A. soccata. Susceptibility to shoot fly was associatedwith high amounts of soluble sugars, fats, leaf surface wetness andseedling vigour; while leaf glossiness, plumule and leaf sheath pigmentation,trichome density and high tannin, Mg and Zn showed resistance toshoot fly. Stepwise regression indicated that Mg, Zn, soluble sugars, tannins,fats, leaf glossiness, leaf sheath and plumule pigmentation and trichomedensity explained 99.8% of the variation in shoot fly damage.Path coefficient analysis suggested that leaf glossiness, trichome density,Mg and fat content and plant plumule pigmentation can be used asmarkers traits to select for shoot fly resistance in sorghum

publication date

  • 2011
  • 2011