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Inheritance of Dicamba Resistance in Wild Mustard (Brassica kaber)

Published online by Cambridge University Press:  12 June 2017

Marie Jasieniuk ,
Ian N. Morrison  and
Anita L. Brûlé-Babel
Marie Jasieniuk
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2
Ian N. Morrison
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2
Anita L. Brûlé-Babel
Affiliation:
Dep. Plant Sci., Univ. Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2
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Abstract

The inheritance of resistance to dicamba in wild mustard was determined by making reciprocal crosses between a resistant (R) population derived from a field treated repeatedly with auxin-type herbicides, and a known susceptible (S) population. The resulting F1 hybrids were selfed to produce F2 populations and backcrossed to the S parent. At the three- to four-leaf stage, parental, F1, F2, and backcross populations were screened for resistance to dicamba at three dosages (50, 200, and 400 g ai ha−1). F1 progeny survived all dosages and exhibited levels of injury similar to the R parental population. F2 populations segregated in a 3:1 ratio of R to S phenotypes. Progeny of backcrosses segregated in a 1:1 (R:S) ratio. Responses of the F1, F2, and backcross populations to treatment with dicamba indicate that resistance is determined by a single, completely dominant nuclear allele.

Keywords

Dicamba, 3,6-dichloro-2-methoxybenzoic acidwild mustard, Brassica kaber(DC.) L. C. Wheeler, Sinapis arvensis L. #3 SINARGeneticsherbicide resistanceauxinSinapis arvensisSINAR
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 43 , Issue 2 , June 1995 , pp. 192 - 195
Copyright
Copyright © 1995 by the Weed Science Society of America 

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References

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