Dynamic menu item based on Views argument
I never used breadcrumbs and i am quite new to Drupal but i think breadcrumbs get their copy from the URL arguments  ( which is also where view is getting its arguments, well in most cases). Though the menu items get their copy from the taxo (if you use a taxonomy menu block) or whatever name you gave them in the menu section of the site admin. 

Therefor the only solution i would see, is to create you owns menu template in which you can use function such as drupal_get_path_alias() to populate your menu.