11All India Coordinated Sorghum Improvement Project IARI-Regional Station, Rajendranagar, Hyderabad-500 030
*Present address: Vice-Chancellor, Marathwada Agricultural University, Parbhani-431 402.
A 17×17 F1 diallel was evalutated for stem borer resistance under artificial infested conditions. Number of holes per internode and peduncle showed 36.6 and 44.2% heritability respectively. Tunneling parameters were poorly heritable (6.4–16%). Correlated response of number of holes per peduncle and per stalk were relatively higher. Selection for number of holes can therefore improve other resistance parameters. Derived resistant lines, E 302 and SPV 135 were better general combiners than the basic resistant stocks for % tunneling per stalk. IS 2312 and CSV 8R were good general combiner for resistance parameters of peduncle. Among high yielding derivatives, SPV 104 was best combiner while SPV Nos. 103, 105, 140 and CSV 4 were average combiners.
