All India Co-ordinated Sorghum Improvement Project, IARI Regional Research Station, Hyderabad, 500030
*Formerly FAO/SIDA Trainee and presently First Research Officer (Sorghum), Agricultural Research Station, Gezieret Shandawill (Sohag), Egypt, U.A.R.
Online published on 25 January, 2012.
A genetic analysis of ovipositional non-preference underlying resistance to sorghum shoot fly is attempted from a line × tester mating system where the parents used were exotics as well as stable derivatives from exotic × Indian crosses. Some of the derived males, females and hybrids involving them were superior in shoot fly reaction when compared to exotics. The inheritance of ovipositional non-preference appears additive and the hybrids are generally superior compared to their parents. The parental performance is a good indication of the hybrid behaviour. Operation of ovipositional suppression factor could bring about a cumulative effect on insect population when the preferred host is removed and the insect has no longer any choice. Till such time, replacement of preferred types will itself be an advantage
