| occurrence of a new subclade of leptosphaeria biglobosa in western australia. | stem canker of crucifers is caused by an ascomycete species complex comprising of two main species, leptosphaeria maculans and l. biglobosa. these are composed of at least seven distinct subclades based on biochemical data or on sequences of internal transcribed spacer (its), the mating type mat1-2 or fragments of actin or beta-tubulin genes. in the course of a wide-scale characterization of the race structure of l. maculans from western australia, a few isolates from two locations failed to amp ... | 2008 | 18944083 |