self-pollination

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Self-incompatibilityclick for a larger image
Fig. 279 Self-incompatibility . The process depicted results in the progeny being S 1 /S3 and S2 /S3.

self-pollination

the transfer of pollen from the stamen of a flower either to the stigma of the same flower or to another flower on the same plant. Since self-pollination leads to self-fertilization which is a form of inbreeding, many plants have developed mechanisms to prevent its occurrence. For example, plants can be DIOECIOUS, show SELF-INCOMPATIBILITY, and have differential maturation times of male and female floral organs on the same plants (for example, see ARUM LILY). Compare CROSS-POLLINATION.
References in periodicals archive ?
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.