Method for screening and identifying shade-tolerant soybean germplasm

Abstract

The invention discloses a method for screening and identifying shade-tolerant soybean germplasm. The method specifically comprises the following steps: (1) sowing soybeans by adopting a potting process, and performing health care and seedling strengthening after seedling emergence; (2) 25-30 days after seedlings emerge, carrying out natural light treatment and shading treatment until the seedlings are mature; and (3) after the soybeans are mature, respectively measuring the number of main stem nodes, the number of branches, the internode length, the lodging resistance, the number of single plant pods, the hundred-grain weight and the single plant grain weight after natural illumination treatment and shading treatment, and calculating the shade tolerance coefficient of each character index, the membership function value of each comprehensive index, the weight of each comprehensive index and the comprehensive shade tolerance evaluation value of each variety. Specific germplasm identification, inheritance and improvement research on characters such as the number of main stem nodes, the number of branches, the internode length, lodging resistance, the number of single plant pods, the weight per hundred grains and the weight per plant grains are carried out around the breeding target of the shade-tolerant soybeans, and a good foundation is laid for screening of shade-tolerant soybean germplasm.

Description

technical field [0001] The invention relates to the technical field of soybean screening, in particular to a method for screening and identifying shade-tolerant soybean germplasm. Background technique [0002] Soybean is the main source of plant protein. As a high-quality protein food for combat preparation and balanced nutrition, soybean has always been one of the crops that cannot be ignored by countries all over the world. In the 1960s, the Food and Agriculture Organization of the United Nations regarded soybean as the best crop to solve human nutritional deficiencies, and called on countries all over the world to expand planting and utilization. China is the hometown of soybeans. Before the 1950s, China has always been the world's largest producer and exporter of soybeans. The area keeps decreasing, and farmers are less motivated to plant beans. my country has a long history of soybean cultivation, wide distribution, multiple uses, diverse multiple cropping systems, an...

AI Technical Summary

Problems solved by technology

[0005] Due to the current lack of understanding of the genetic mechanism of soybean shade tolerance, the failure to make full use of my country's rich soy...