Protein content-stable soybean breeding method

Abstract

Belonging to the technical field of cultivation of new crop varieties, the invention discloses a protein content-stable soybean breeding method. The method includes: production area division; test site selection; acquisition of soybean breeding offspring F1 and F2 generations, F2 generation planting and F3 generation selection; plant-to-row planting of the soybean breeding offspring F3 generationand strain selection of F4 generation; strain planting of the soybean breeding offspring F4 generation and single plant selection of F5 generation; plant-to-row planting of the soybean breeding offspring F5 generation and strain selection of F6 generation; strain planting of the soybean breeding offspring F6 generation and single plant selection of F7 generation; plant-to-row planting of the soybean breeding offspring F7 generation and strain selection of F8 generation; and acquisition of a protein content-stable new soybean variety. Compared with the traditional breeding method and the conventional shuttle breeding method, the soybean breeding method provided by the invention has greatly enhanced efficiency of breeding a protein content-stable soybean variety, and the new variety also hasthe characteristics of good yield stability and wide adaptability.

Description

technical field [0001] The invention belongs to the technical field of cultivating new varieties of crops, in particular to a soybean breeding method with stable protein content. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: Chongqing City is located between 105°17'-110°11' east longitude and 28°10'-32°13' north latitude, spanning 5°6' in longitude and 4°2' in latitude. It is less affected by changes in latitude and longitude, but the topography of Chongqing is complex, with large differences in altitude among districts and counties, and the three-dimensional climate is obvious. Chongqing's soybean planting area is about 1.6 million mu, and its main production areas can be roughly divided into three parts: low-altitude production areas, middle-altitude production areas, and high-altitude production areas. The first is a low-altitude production area between 100 meters and 500 meters above sea level, with a ...

AI Technical Summary

Problems solved by technology

The new varieties bred often have better adaptability, but it cannot be guaranteed that every variety bred is a soybean variety with stable protein content

[0007] (3) There are still two reasons why it is difficult to select soybean varieties with stable protein content by conventional soybean shuttle breeding methods: one is due to different genotypes, F 2 , F 3 , F 4 , F 5 There are bound to be differences in protein content between low and middle generations; second, planting in different seasons and years will also lead to differences in protein content between generations

If the test result is "yes", the traditional hybrid breeding method and the conventional shuttle breeding method will be 2 or more generations higher than the new method at the time of variety approval, and the increase of generations means the decline of breeding efficiency

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