Causes and control methods of hybrid degeneration of wheat varieties

Hybrid degeneration of wheat varieties is a common phenomenon after many planting. After hybrid degeneration, the purity of wheat seeds is low, the quality is poor, the stress resistance is reduced and the yield is obviously reduced.

So what is the reason for the mixed degradation of wheat quality? How to prevent it? Let's get to know each other with Bian Xiao.

First, the reasons for uneven quality

1, mechanical mixing

The idea of hybridity exists in the process of sowing, threshing, drying, transportation and storage of wheat, which is one of the main reasons for the deterioration of stored wheat quality at present.

2. Biological hybridization

Continuous natural hybridization of different varieties in the field will lead to the separation of offspring, the emergence of bad individuals and the destruction of the purity of varieties, which is called biological hybridization.

When mechanical hybridization is serious, it will aggravate biological hybridization and accelerate variety degradation.

3. Variety mutation

In the process of popularizing new wheat varieties, due to the influence of many natural factors, some mutations will occur in wheat, but the traits of mutant personality and breakthrough individuals in production are mostly poor.

4. Wheat itself.

Some new wheat varieties cultivated by miscellaneous families have unstable characters and low purity, and these varieties will be separated continuously during planting, resulting in the degeneration of mutant individuals and mixed varieties.

5. The quality of selected seeds is not high.

In the production process, seeds were not selected according to the typical characteristics of the variety, which led to poor seed quality and variety degradation.

Second, prevention and control methods

1. First of all, we must guard against mechanical mixing. During the harvest, seeds must be collected, transported, aired and stored separately. During seed storage, insects, rodents and molds should be prevented. Before sowing, the seeds should be dried and disinfected to ensure good quality.

2. In the process of wheat breeding, attention should be paid to taking isolation measures to prevent biological mixing. Generally, three isolation methods can be adopted.

One is spatial isolation, that is, planting different wheat varieties should be separated by a certain distance; Second, time isolation is the wrong broadcast period to stagger the flowering period of different wheat varieties; The third is the barrier isolation method to prevent different varieties of pollen from reaching the wheat Taneda through barriers such as tall crops and forests.

3. When selecting and keeping seeds, we must strictly remove impurities, especially pay attention to removing plants or panicles that do not meet the typical characteristics of the variety. At the same time, it is necessary to remove spikes and plants that are polluted by pests and diseases in time.

The above is the introduction of the causes and prevention methods of wheat hybrid degradation. I hope it will help you. If you want to know more, please pay attention to us.