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The location and effects of genes modifying the response of wheat to the herbicide difenzoquat

Published online by Cambridge University Press:  27 March 2009

D. Leckie  and
J. W. Snape
D. Leckie
Affiliation:
Cambridge Laboratory, Institute of Plant Science Research, JI Centre for Plant Science Research, Colney Lane, Norwich NR4 7UJ, UK
J. W. Snape
Affiliation:
Cambridge Laboratory, Institute of Plant Science Research, JI Centre for Plant Science Research, Colney Lane, Norwich NR4 7UJ, UK
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Summary

Single chromosome substitution lines of hexaploid wheat were developed using a variety resistant to difenzoquat, Chinese Spring, as donor and a susceptible variety, Sicco, as recipient, and were used to identify chromosomes carrying genes which modify the responses of these varieties. It was found that chromosomes 3B and 5D from Chinese Spring might act to reduce the amount of damage caused by the herbicide in the presence of the allele for susceptibility at the Dfql locus. The intermediate response to the herbicide, which is shown by some commerical varieties, was also investigated using a backcross reciprocal monosomic analysis. In these varieties, the allele at the Dfql locus determining the reaction to the herbicide was shown to be similar to that of the susceptible variety Sicco. It is, therefore, probable that the responses of intermediate varieties are due to the effects of modifier genes increasing resistance.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 118 , Issue 1 , February 1992 , pp. 9 - 15
Copyright
Copyright © Cambridge University Press 1992

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References

REFERENCES

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