saltensis occur in sympatry, genetically pure samples of either species were found together with hybrids and introgressant
forms in several populations (Zelener et al.
Genetic diversity for esterases in the recently evolved stabilized introgressant
, Senecio vulgaris L.
However, the array of introgressant
markers was smaller than at Gaylord's site.
The detected additional variation originates from the introgressant
in the first scenario (Kesseli et al.
Plants closely related to domesticated plants and growing outside of cultivation may be: (1) ancestors of the domesticates; (2) escapes from cultivation, either identical to the domesticates or altered by generations of selection for existence in nature; (3) hybrids or introgressants
between a wild relative and the domesticate.
Because tea is an outcrossing species, clinal introgressants
extending from these two extremes are frequently observed, but these are still referred to as China or Assam teas depending on their morphological proximity with the main taxa (Wight, 1962; Banergee, 1992).