Inheritance of host plant resistance to the sorghum shootfly

Rana, B.S. and Jotwani, M.G. and Rao, N.G.P. (1981) Inheritance of host plant resistance to the sorghum shootfly. Insect Science and its Application, 2 (1-2). 105-109 .

[img] PDF
Restricted to ICRISAT researchers only


The behaviour of shootfly resistance is examined over the Fl, F2, F3 and advanced generations. The Fl is almost intermediate between two parents with an added heterotic advantage of a lower ‘dead-heart’ percentage. Resistance shows partial dominance under low to moderate shootfly infestation but this relationship may shift under heavy infestation conditions. The resistance is polygenic in nature and governed by additive genes. In the absence of host immunity, gradual accumulation of favourable genes is possible by line breeding from R × I and I × I crosses by selecting 1 SD below the population mean. Selection for multiple characters limits the genetic advance for shootfly resistance—resulting in 0- 5% selection intensity and relatively less resistant but high yielding desirable progenies. Multilocation tests enable the selection of varieties stable for shootfly resistance

Item Type: Article
Uncontrolled Keywords: Shootfly; resistance; inheritance; varieties; progenies; selection; crosses; generations; susceptible
Author Affiliation: AICSIP, IARI Regional Station, Hyderabad, India
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 21 Feb 2012 09:21
Last Modified: 21 Feb 2012 09:21
Official URL:

Actions (login required)

View Item View Item