Soybeans are self-pollination crops, which often result in deterioration of the species because of mechanical intermixing, poor climatic conditions and cultivation conditions, and natural hybridization.
Therefore, self-seeding seeds cannot be used for a long time. Seeds should be changed every three years. Therefore, we must persist in purifying rejuvenation and do a good job of breeding and breeding in order to preserve
The species with excellent varieties.
Method for purifying and rejuvenating soybean varieties
The common method for selecting and rejuvenating soybeans for selection of strains consists of three steps: single plant selection, strain identification, and hybrid high-reproduction. Individual plant selection
Nursery, strains comparison nursery, mixed propagation nursery three farms.
Single plant selection nursery selected typical excellent plants for test species, single plant threshing. Eliminate single plants that are inconsistent with the characteristics of grain color, grain shape, umbilicus, etc.
.
The strain identification nursery will form one line for each single plant (strain). Elimination of strains that are inconsistent with the original variety. Planting design can be used every 10 to 20 lines of 1 control
The way (original breed). Selected strains for breeding in the next year.
In the mixed propagation garden, the above-mentioned identifications of the strains and the mixed harvested seeds are planted at equal distances and then sown in high magnification.
The seeds produced by the above 3 nurseries are referred to as super purified rejuvenation stocks.
When the soybeans mature, select a certain number of robust and excellent plants with the typical characteristics of the varieties, and then select them strictly by the indoor, mixed and removed.
The pellets, individually preserved, are used as breeding seeds for the following year. The breeding field adopts advanced cultivation and management measures and strictly eliminates impurities.
One strain was selected as a single plant with the typical traits of the original cultivar, and their offspring were finely bred and propagated. This method expands the breeding of single-line harvested seeds.
The age limit is slightly longer than the strain selection method.
Establishing a seed field
The soybean super seed obtained by purification and rejuvenation requires a seed field to be established and a large number of breeding production seeds due to the small seed amount.
The size of the seed field is determined by the number of seeds sown and the yield per acre. The area of ​​general seed fields is the area of ​​production fields or seed fields at the next higher level.
4% to 5% can be. For the selection of plots in the seed field, land plots with flat terrain, well-drained water, uniform soil, and no heavy land or land should be used. Increase farms
Fertilizer, and according to the ratio of nitrogen and phosphorus fertilizer application. Strengthen field management, and time seedlings, timely cultivating, weeding, soil cultivation, so that the soil is loose and weed free. Flower drum
During the grain period, top dressing is applied 1 or 2 times, timely irrigation is performed during drought, and pests and diseases are prevented and treated in time. During the whole growing period, according to the morphological traits, at the seedling stage, flowering stage, and
Mature period, strictly go to miscellaneous and inferior. After maturity, timely harvesting, strict grasp of harvest, threshing, etc. can easily lead to several aspects of mechanical mixing.
Ultrasonic Cleaner Machine,Ultrasonic Cleaning Equipments,Laboratory Ultrasonic Machine,Lab Ultrasonic Cleaning Machine
ZHEJIANG FOMOS MEDICAL TECHNOLOGY CO.,LTD. , https://www.ifomos.com