An innovative breeding method for Huang Ruiqun germplasm

Abstract

The present invention relates to a crop breeding method, in particular to an innovative breeding method for Huangruiqun germplasm, comprising the following steps: selecting the Huanggaiqun inbred line as one of the parents, hybridizing with the improved Ruidequn inbred line, and selecting the tall and strict line Methods Several excellent inbred lines were selected from continuous selfing for multiple generations; SSR molecular marker technology was used to confirm that the selected inbred lines belonged to Huangrui group; The main corn varieties planted in my country were used as controls, and repeated planting was carried out in multi-point and multi-row areas. The yield of the selected test cross combination was 10% higher than that of the main corn varieties planted in my country, and the stable yield, lodging resistance, disease resistance, drought resistance, and high temperature resistance were excellent The inbred line that is better than the corresponding hybrid combination of Huanggaiqun inbred line and improved Ruidequn inbred line is Huangruiqun's new germplasm. The innovative breeding method of Huangruiqun germplasm of the present invention aims to develop germplasm resistant to high temperature and drought, resistant to overcast and rainy, strong in disease and lodging resistance and high in yield potential in the Huanghuaihai spring corn region.

Description

technical field [0001] The invention relates to a crop breeding method, in particular to an innovative breeding method for Huang Ruiqun germplasm. Background technique [0002] Maize germplasm resources are the material basis for cultivating high-yielding, high-quality, multi-resistant hybrids. In particular, local germplasm resources with good ecological adaptability are indispensable and important materials. At present, due to the impact of foreign excellent germplasm resources, a large part of the maize genetic breeding units in the Huanghuai Haichun corn region have given up the research and utilization of the germplasm of the Huanggai group, resulting in a significant decline in the genetic gain of my country's unique local germplasm. Moreover, in recent years, natural disasters such as wind, rain, drought, waterlogging, high temperature and low temperature and little sunshine have been frequent in the Huanghuaihai region, and pests and diseases have emerged one after ...

AI Technical Summary

Problems solved by technology

At present, due to the impact of foreign excellent germplasm resources, a large part of the maize genetic breeding units in the Huanghuai Haichun corn region have given up the research and utilization of the germplasm of the Huanggai group, resulting in a significant decline in the genetic gain of my country's unique local germplasm

Moreover, in recent years, natural disasters such as wind, rain, drought, waterlogging, high temperature and low temperature and little sunshine have been frequent in the Huanghuaihai region, and pests and diseases have emerged one after another. As a result, most corn inbred lines on the market have been unable to meet the current and future corn production. There is an urgent need for germplasm resources with excellent comprehensive traits such as tolerance to rain and little sunshine, strong disease resistance and lodging resistance, and high yield potential

[0003] In order to adapt to the needs of the situation and solve the problems of high temperature tolerance, poor drought resistance, poor lodging resistance, and poor disease resistance of most corn inbred lines in the Huanghuaihai region, we proposed a Huangrui group species based on the theory of maize genetics and breeding and combined with breeding practices. Qualitative innovative breeding methods