A new soybean germplasm mn413 with high yield

Source and breeding process

The new MN413 soybean germplasm was hybridized with the high-yielding line MS8118 (N50 times by plasma treatment, 30Kev) as the female parent and Yudou 10 in 1990. After mixed group and systematic breeding, the new soybean germplasm was finalized and named MN413 (Mengning 413) in 1997. In 1998, the average yield per mu was 239.7kg, 18.5% higher than that of Zhongdou 19, and 274kg per mu in 0.4mu breeding field; in 1999, the average yield per mu was 40.7% higher than that of Zhongdou 19, with high resistance to mosaic virus and soybean cyst nematode, high yield and wide adaptability.

Identification results of high-yield cultivation

A high-yield cultivation experiment with an area of 1.625 mu was carried out in Mengting Comprehensive Experimental Station in 2000. The field yield was measured by experts from Nanjing Agricultural University, Shandong Academy of Agricultural Sciences, Jiangsu Academy of Agricultural Sciences, Anhui seed Corporation and Fuyang Fengle seed Group on September 8, 2000. the yield was measured by three-point sampling with 8 square meters per site. The results of yield measurement are as follows: the density is 11005.5 plants / mu, the pods per plant is 79.59, the number of grains per plant is 162.24, the 100-grain weight is calculated according to the perennial low value of 21g, the conversion coefficient is 0.90, and the average yield per mu is 322.5kg. After harvest and threshing on September 16, 2000, the total weight was 512kg, and the actual yield area was 1.625 mu (43m long × 25.2m wide), which was equivalent to 315.08kg per mu, which exceeded the yield index of 310kg per mu for super-high-yield breeding in Huang-Huai area. Its high yield appearance is: 85cm of plant height, 4.2branches, 21 nodes of main stem, limited podding habit, compact plant type, long oval leaves, dark green leaves, purple flowers, gray hairs, oval grains, light brown navel, full growth period of 106days, sturdy stem, well-developed root system, all deciduous leaves, no pods.

Main cultivation techniques

Grasp early, sufficient, uniform, strong seedlings early with water on demand, one sow the whole seedling, 10 days after sowing seedlings to fill the gap, using 50cm+30cm wide and narrow rows, plant spacing 15cm, remaining seedling density of 11000 plants per mu. Focus on rational uniform planting and create uniform planting groups.

Heavy application of basal fertilizer, reasonable topdressing and skillful application of foliar fertilizer applied diamine phosphate 30kg, calcium superphosphate 40kg, urea 10kg, potassium sulfate 15kg per mu, and urea 8kg at the early flowering stage. Foliar fertilizer of potassium dihydrogen phosphate was skillfully applied during flowering and podding period.

80% omethoate EC was used for pest control at seedling stage, 40kg was sprayed per mu to control aphids and bean stalk flies twice, and 20% permethrin plus 20% Kuaishaling was used to control bean pod borer, bean moth and leaf borer in the middle and later growth stage.

In order to prevent lodging, in addition to proper sparse planting, stem and leaf growth was controlled by spraying 20kg per mu with 20ml acetamine and water at full flowering stage.

Inspiration from obtaining high-yielding germplasm

The parents with high yield mutant genotypes were selected. MN413 was bred by using high-yielding mutants of MS8118 treated with N50 times and 30Kev plasma as parents. The selection of high-yield plant type for hybrid offspring should focus on three points: developed root system, compact plant type convergence, moderate branching, luxuriant plants and many nodes in the main stem.

In order to do a good job of field cultivation, the key is to grasp uniform seedlings to create uniform planting population, to increase the application of fertilizer and to re-apply base fertilizer, to grasp growth regulation or plant nutrition operation.