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]](http://eprints.icrisat.ac.in/style/images/fileicons/application_pdf.png) |
PDF
Restricted to ICRISAT researchers only |
Abstract
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: | http://journals.cambridge.org/action/displayAbstra... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/3087 |
Actions (login required)
 |
View Item |
