How to translate text using browser tools
1 July 2005 Inheritance of picloram and 2,4-D resistance in wild mustard (Brassica kaber)
Mithila Jugulam, Michael D. McLean, J. Christopher Hall
Author Affiliations +

The primary goal of this research was to determine the inheritance of cross-resistance to several groups of auxinic herbicides through classical genetic approaches using auxinic herbicide–resistant (R) and –susceptible (S) wild mustard biotypes obtained from western Canada. F1 progeny were raised from crosses between homozygous auxinic herbicide–R and –S wild mustard parental lines. The F1 and F2 populations were assessed for picloram (pyridine group) and 2,4-D (phenoxyalkanoic group) resistance or susceptibility. Analyses of the F1 as well as the F2 progeny indicate that a single dominant gene confers the resistance to picloram and 2,4-D similar to an earlier report of dicamba-based (benzoic acid group) resistance in this wild mustard biotype. Furthermore, analyses of backcross progeny in this species indicate that resistance to all three auxinic herbicides, i.e., picloram, dicamba, and 2,4-D, is determined by closely linked genetic loci. With this information on inheritance of resistance to several auxinic herbicide families, the R biotype of wild mustard offers an excellent system to isolate and characterize the auxinic herbicide–resistance gene.

Nomenclature: 2,4-D; picloram; wild mustard, Brassica kaber (DC) L.C. Wheeler SINAR.

Mithila Jugulam, Michael D. McLean, and J. Christopher Hall "Inheritance of picloram and 2,4-D resistance in wild mustard (Brassica kaber)," Weed Science 53(4), 417-423, (1 July 2005).
Received: 18 August 2004; Accepted: 1 January 2005; Published: 1 July 2005
Auxinic herbicides
Herbicide resistance
near-isogenic lines
Get copyright permission
Back to Top