GENE EFFECTS FOR SHOOTFLY (ATHERIGONA SOCCATA, RONDANI) RESISTANCE IN SORGHUM

Abstract

A field study was undertaken to estimate gene effects for shootfly resistance involving resistance x resistance, resistance x susceptible and susceptible x susceptible combinations. Six crosses viz., ICSV ?OO x ICSV 705, ICSV 705 x IS 2312, ICSV 700 x GJ 39, ICSV 700 x GJ 40, GJ 39 x Malwan and CSV 15 x GSSV 148, each having six generations Le., Pu Pz' Fl , Fz' BCl and BCz were evaluated in compact family block design. Single rows of 4m length were represented by parents and Fl generation, two rows by back cross generations, while four rows by Fz generation. The distance was maintained at 45 x 15 em. The transformed values using square root and arcsin transformation for number of eggs per plant and deadheart (%) were used for. statistical analysis. Gene effects were estimated using six parameter model suggested by Hayman [1].