The best-selling seedless watermelon is bred through hybridization technology. bai seedless watermelon belongs to the triploid, which is also bred from the seed, however, the watermelon planted from seedless watermelon seeds, seedless or containing a small amount of seeds, can not be bred through the seedless watermelon seeds to the next generation.

I. Seedless watermelon production principle.

Ordinary watermelon is a diploid plant, that is, a plant with two sets of chromosomes in the body. Using artificial induction of polyploidy method, treatment with colchicine, making 2 times the watermelon cell chromosomes become 4 times. 4 times the watermelon is able to normal flowering and fruiting, the seed can be normal sprouting growth.

When the 2x watermelon seedling grows into a 4x watermelon plant, use it as the mother plant, that is, when the 4x plant blooms, remove its stamen, so that it can not self-pollinate, and then take the pollen of the 2x watermelon plant to pollinate in the 4x pistil for crossbreeding, and then let the 4x plant pollinated by the pollen of the 2x plant to naturally grow, bloom, and bear fruits, and you can get the 3x seed, which is the cultivated aseptic seed that can be planted. is the seedless watermelon seed that is bred to be planted.

Seedless watermelon is triploid, due to the triploid cells in meiosis when the association will be disordered, so triploid watermelon can not form the seed, which is also known as seedless watermelon.

Two, get seedless watermelon specific measures.

1, with 0.2 ~ 0.4% of colchicine (C22H26O6N) liquid dip diploid common watermelon seeds for 12 ~ 24 hours, or in the afternoon every day at 6 ~ 7 o'clock with 0.2 ~ 0.4% of the colchicine liquid drops in the tip of the stem of its seedlings on the growth point for four consecutive days.

2. The treated seeds or seedlings are washed with water. Place the plants under diffused light and moderately low temperatures.

3, select the appropriate polyploid: select the sprouting of the thickness of the fat significantly increased, the tip of the young root expansion phenomenon occurs, the body size of the larger plants. Or you can check under the microscope whether the number of chromosomes has been doubled (ordinary diploid watermelon 2N = 22, tetraploid watermelon 4N = 44).

4. Allow the tetraploid plants to grow naturally and pollinate them with diploid pollen during the flowering period, resulting in tetraploid watermelon and triploid watermelon seeds.

5, take the triploid watermelon seeds for normal planting, resulting in triploid seedless watermelon.

The best-selling seedless watermelon in the market is bred through the hybridization technology of tetraploid watermelon and diploid watermelon. It is seedless because it is triploid and cannot reproduce seeds.