First, the cause of promiscuous degradation We sell kinds of tea, made in China. Main product is Green Tea, also have black tea. Green Tea Green Tea,Green Tea Organic,Green Tea Packets,Pure Green Tea Chengdu Minghe Agriculture Co.,Ltd , http://www.cdmhny.com
1. Natural hybrid peppers are often exotic plants. The natural hybridization rate is above 10%. During the flowering and pollination stage, natural hybridization occurs due to pollination of insects. Under normal circumstances, one species will not be planted in one plot and many plants may be planted. Varieties, so that it is easy to cause natural hybridization, produce a large number of hybrid seeds between varieties, hybrid seeds are unstable, large variability, leading to degradation of elite varieties.
2. During the process of planting, growing seedlings, transplanting, planting, harvesting, and drying the mechanical mixed pepper, due to a large number of working procedures, it is easy for the seeds of different varieties to be mixed with each other, so that the purity of the improved seeds is reduced. This is also the current improved seed. One of the causes of confounding degradation.
3. The selection of natural environment The growth of elite varieties in the natural environment will produce some undesirable variations. These undesirable variations will gradually increase without artificial selection and miscellaneous. From the perspective of some important characters of chili peppers, natural environment choice and people The requirements for improved varieties are inconsistent. This is another reason why pepper varieties are prone to degradation.
Second, the main method of prevention
1. Strengthen the artificial selection, do a good job of cultivation and reproduction of improved varieties, implement a three-reserve system, that is, adopt the three-reserve breeding method of breeding line, plant nursery, and original plant nursery to produce high-quality seed species; implement seed field breeding seeds The seed selection method can also be used to obtain improved varieties each year. In the field, a simple seed selection method is adopted to select excellent individual plants in field plots with high yield and traits, and then mixed and preserved, which can also improve seed purity. Both cultivation and reproduction should be conducted under good cultivation conditions in a pepper field that is well-growth and has a high purity in the field.
2. Anti-Hazard As far as possible to adhere to the principle of a variety of a variety of varieties of planting interval of at least 500 meters or more, in order to reduce the natural hybridization caused by insect pollination. From planting to harvesting, every link must be strictly prevented to prevent mechanical mixing and ensure the purity of improved varieties.
After selecting the seeds and storing the good varieties of peppers, we must promptly choose to remove the bad seeds. The seeds must not be placed on the cement floor to be dried in the sun, otherwise the seed germination rate will be reduced; the moisture content of the seeds should reach 8% or less when bagging. Seeds should be stored in a ventilated, dry, cool place.