Narrow-leafed lupin cultivar Tanjil has proven susceptible to metribuzin herbicide, resulting in large yield losses.

Therefore, the need to incorporate metribuzin tolerance into anthracnose resistant cultivars has become urgent.

Grains Research and Development Corporation supported researchers have discovered genotypic differences in metribuzin tolerance among lupin cultivars.

This research characterises differential tolerance in narrow-leafed lupin cultivars and investigates effects of temperatures on susceptibility of Tanjil to metribuzin.

Large genetic variation is available for the improvement of tolerance to metribuzin in lupins.

Simple genetic inheritance of this trait makes breeding for anthracnose and metribuzin tolerance relatively straightforward.

One primary line in the breeding program, WALAN2141, was 5.4 times more tolerant than Tanjil.