The Eleventh Regional Wheat Workshop For Eastern ... - Cimmyt

Breedingfor disease resistance in wheat in Uganda - Wagoire
assess for other attributes such as yield.
From the foregoing, it is evident that stem and yellow rust and Septoria leaf blotches
constitute some of the biotic constraints to wheat production in Uganda. Further, Kalengyere
research station is a hot-spot for the aforesaid diseases. However, the occurrence of these
diseases is unpredictable as evidenced from the seasonal variation in their occurrence.
Therefore, testing of lines both newly developed and already in production around the world
needs to be carried out continuously in such hot-spots. In this way, researchers will keep
ahead of impeding disasters that arise from development of new disease biotypes.
REFERENCES
Braun, H.J., Rajaram, S. and M. van Ginkel. 1997. CIMMYT's approach to breeding for wide adaptation. pp.
197- 205. In: Tigerstedt, P.M.A. (ed.). Adaptation in plant breeding. Kluwer Academic Publishers,
Dordrecht, The Netherlands.
Mead, R., Curnow, R.N. and A.M. Hasted. 1993. Statistical methods in agriculture and experimental biology.
2 nd edition. Chapman and Hall, London, 415 pp.
Peterson, R.F., Campbell, A.B. and A.E. Hannah. 1948. A diagrammatic scale for estimating rust intensity of
leaves and stems of cereals. Can. 1. Res. Sect. C 26: 496-500.
Pretorius, Z.A., Singh, R.P., Wagoire, W.W. and T.S. Payne. 1999. Detection of virulence to wheat stem rust
resistance gene SR 31 in Puccinia graminis.j sp. tritid in Uganda. Plant Disease, 84: 203.
Roelfs, A.P., Singh. R.P. and E.E. Saari . 1992. Rust diseases of wheat: Concepts and Methods of Disease
Management. Mexico, D.F.: CIMMYT. pp. 56-57.
Wagoire, W.W. 1997. Yellow rust resistance of wheat cultivars in Uganda. Ph.D. Thesis, Department of
Agricultural Science, The Royal Veterinary and Agricultural University, Denmark.
Wagoire, W. W., Stolen, 0., Hill, J. and R. Ortiz. 1998. Is there a "cost" for wheat cultivars with genes for
resistance to yellow rust caused by Puccinip. striiformis? Crop Protection, 17: 337-340.
Questions and Answers:
M.A. Mahir: If using fungicide (against other foliar diseases) with R x R crosses and it gives
a CI value as low as 0-13, why don't you go for fungicide against YR itself?
Answer: Most wheat farmers in Uganda are small-scale and recommendation of fungicide
would not be feasible.
Sewalem Amogne: What are the reasons for the change in the importance of stem rust over
time at your research site?
Answer: No definite answer, but could be due to the appearance of a new pathotype of stem
rust.
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