heterophylla to self-pollinate
might represent a mechanism to cope with unpredictable pollination and ensure the production of seeds.
Tillandsia lotteae is a nice example of a highly ornamental bromeliad that I tried to self-pollinate
for more than 10 years with no success.
When Mendel allowed two tall parents to self-pollinate
, the offspring were all tall.
This is particularly important for crops that do not self-pollinate
, such as corn and squash.
Carefully, Mendel arranged for various plants to self-pollinate
, wrapping them to guard against accidental pollination by insects.
Even though tomatoes self-pollinate
for the most part, if you plan to save the seed, it's best to separate varieties by at least 20 feet.
In contrast, plants that only self-pollinate
may be less able to quickly adapt.
The reason that sweet pea breeding has remained the domain of the amateur is because the flowers self-pollinate
on the point of opening, and so varieties may be grown side by side (in a garden) with no chance of cross pollination by insects or wind.