What problems should be paid attention to when collecting seeds for sexual reproduction?

The mother plant should be a mature plant with strong growth, plump plant shape, no pests and diseases, and excellent shape. The seeds collected in this way can meet the requirements of rich and full seeds, pure quality, high germination rate, neat emergence and Miao Zhuang.

2. Harvest at the right time in the mature period

The seeds picked early are immature and have weak germination ability; The seeds have fallen off or been eaten by birds and pests, so they cannot be harvested when they are picked late.

3. Methods of identifying seed maturity

(1) fruit change recognition

Whether flowers and trees are mature or not has its own characteristics. Such as berries (grapes), drupes (peaches, plums), drupes (begonia, apples) and so on. The peel becomes soft and discolored with a certain sweetness and aroma, which is maturity. The peels of pods, capsules (Bauhinia, Lagerstroemia indica) and samara (Acer mono, Eucommia ulmoides) of dried fruits change from green to yellow-brown, and are mature when they are dried, tightened, hardened or cracked. The fruit scales of conifer cones are dry and hard, turn from green to yellow, and are slightly cracked, so seeds can be collected.

(2) Identification of seed changes

Mature seeds have a certain color in the seed coat and grain, and the grain is full, tough and has a certain weight. Immature seeds are not full and have no liquid, so they are not suitable for harvesting.