What is controlled cross-pollination?
Control-pollination is a technique used in plant improvement to produce progeny that receive genes from each of two known parent plants. Control-pollination consists of transferring pollen from one plant to the receptive female reproductive organs of another plant while excluding all other pollen.
What are the examples of cross-pollination?
The examples of the cross-pollinated plants are grasses, maple trees, tomato etc. In tomatoes the pollen grains are transmitted by the bees or the insects. Except tomato, all other plants given in the options are self-pollinated plants.
Which pollination is also known as controlled pollination?
Mechanical Control. Mechanical pollination control refers to any approach by which pollen transfer is mechanically prevented. In monoecious crops, where male and female flowers are at different positions on the plant, whole male flowers can be removed from the plant to control pollination.
Do tomato plants cross pollinate?
Although tomatoes are self-pollinators, tomatoes can and do crossbreed. Cross pollination occurs when the pollen of one tomato variety pollinates the flower of another variety, usually via insect pollinators such as bees.
Is cross pollination good?
In contrast, cross-pollination—or out-crossing—leads to greater genetic diversity because the microgametophyte and megagametophyte are derived from different plants. Because cross-pollination allows for more genetic diversity, plants have developed many ways to avoid self-pollination.
Does lettuce cross pollinate?
Unlike some other garden crops, even when lettuce does cross-pollinate, the resulting plants are often just as tasty, even though they may be different from the parent plant in appearance. Each lettuce head will “bolt” and grow a tall flower stalk from the center of the plant.
Is Hibiscus cross pollinated?
Pollination in the Wild Hibiscus can self-pollinate when pollen from the male parts of the flower pollinate the female parts of that same blossom. Hibiscus pollen germinates on the stamen, the male part of the plant, and is transferred to the stigma pads of the pistil, the female parts of the plant.
What happens to stamens after fertilization?
Just after the fertilization, some parts of the flower may fall off and remain intact while some are transformed. The ovary of the flower gets enlarged and forms the fruit while the ovarian wall forms the fruit wall. The stamens, style, petals, and stigma of the flower fall off as they are no longer required.
How is controlled pollination done?
Procedure to Controlled Pollination Emasculation Tagging and Bagging: Choose a flower bud and open it to extract the stamens. The plant is then wrapped in a plastic bag to keep unwanted pollen from pollinating it. Bring it in contact with the anther of a male plant that has the desired traits.