Amigo brown condiment mustard

Abstract

Amigo, brown condiment mustard [Brassica juncea (L.) Czern.] had, on average over 30 locations, the same grain yield as Common Brown in Co-op mustard tests 2004-2006 and was well adapted to the mustard-growing areas of the Canadian prairies. Amigo had the same maturity and plant height as Common Brown. Amigo had 3.3% lower fixed oil content and 2.0% greater seed protein content, highly significant improvements in a brown mustard cultivar. Seed weight of Amigo was similar to that of Common Brown. Amigo had very high allyl isothiocyanate content of 13.15 mg g-1 seed compared with Common Brown at 9.35 mg g-1 seed, levels of allyl isothiocyanate typically found in oriental mustard. The allyl isothiocyanate content of AC Vulcan oriental mustard was 12.96 mg g-1 seed in Co-op Mustard Tests at the same locations and years, not statistically different from Amigo. The high allyl isothiocyanate content was incorporated from AC Vulcan into Amigo, through cross breeding and pedigree selection as was the resistance to white rust race 2a. The strategy to transfer disease resistance and seed quality from oriental mustard to brown mustard was successful.Key words: Brassica juncea (L.) Czern., cultivar description, disease resistance, seed quality