Table 3.

Diversifying selection in the wheat stem rust is predominantly detected across pathogen-associated gene families.

	Additional criteria	# of genes	# of genes under diversifying selection
P. graminis f. sp. tritici genes with at least two orthologs	–	10,213	387 (3.8%)
	Member of pathogen-associated gene family	4752	341 (7.2%)
	Member of fungal gene family	5177	43 (0.8%)
	Not a member of gene family	284	3 (1.1%)

10,213 P. graminis f. sp. tritici genes with at least two orthologs were analyzed for site-specific diversifying selection using two likelihood ratio tests of CODEML. The majority of rapidly evolving genes are part of pathogen-associated gene families.