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Screening of local and exotic maize lines for stem-borer resistance with special reference to Chilo partellus

Published online by Cambridge University Press:  19 September 2011

E. O. Omolo
E. O. Omolo
Affiliation:
International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi, Kenya*
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Abstract

After field screening local germplasm for stem-borer (Chilo partellus, Swin.) resistance for four seasons in two years we identified two sources of resistance, Katumani and Kitale. A cross between them performed better than either of the parents. When exotic lines from CIMMYT, Mexico, reported to be resistant to South and Central American stem-borers were screened at Mbita Point Field Station, to test and confirm their resistance to East African stem-borers, a number of them were found to be resistant to Chilo. It was also noted that the level of their resistance was higher and more broadly based than the local source. This shows that the source of origin is always full of genetic variability. This finding now suggests that a cross between the local and exotic sources should offer a wide scope in the multiple resistance or the multiline approach towards pest management.

Keywords

MaizeChilo partellusgermplasmresistanceheterosis
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 4 , Special Issue 1-2: Crop-Borers and Emerging Strategies for their Control , June 1983 , pp. 105 - 108
Copyright
Copyright © ICIPE 1983

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References

REFERENCES

Dabrowski, Z. T., Omolo, E. O. and Nyangiri, E. O. (1980) Resistance of maize stem-borers. ICIPE 8th Annual Report.Google Scholar
Eberhart, S. A., Harrison, M. N. and Ogada, F. (1967) A comprehensive breeding system. Der Zutcher 37, 169–174.Google Scholar
Mangelsdorf, P. C. and Reeves, R. G. (1959) The origin of corn. Botanical Museum Leaflets. Harvard University 18, 329–440.Google Scholar