Elymus canadensis is an allotetraploid but can cross-pollinate with several other strains of Elymus in order to provide more genetic variation .
An allotetraploid mainly reproduces by self - pollination .
Elymus canadensis is an allotetraploid , which mainly reproduces by self - pollination , but can cross-pollinate with several other strains of Elymus in order to provide more genetic variation .