Innovative breeding method of Huanglv-Reid population germplasm

Abstract

The invention relates to a crop breeding method, in particular to an innovative breeding method of a Huanglv-Reid population germplasm. The method includes the steps: selecting a Huanglv modified population inbred line as one of parents, hybridizing the Huanglv modified population inbred line and an improved Reid population inbred line, and continuously inbreeding multiple generations by a Gaodayan breeding method to select a plurality of excellent inbred lines; confirming the selected inbred line belonging to a Huanglv-Reid population by the aid of an SSR (simple sequence repeats) molecular marker technology; selecting inbred lines from an X population as a female parent testing variety to perform test cross; repeatedly planting the test cross variety in multi-point multi-row areas by taking a current Chinese mainly-planted corn variety as contrast, and selecting one inbred line to obtain a new Huanglv-Reid population germplasm. The inbred line has the advantages that the yield of test cross combination is 10% higher than that of the Chinese mainly-planted corn variety, and the yield stability, the lodging resistance, the disease resistance, the drought resistance and the high-temperature resistance of the inbred line are superior to those of corresponding hybrid combination of the Huanglv modified population inbred line and the improved Reid population inbred line. The innovative breeding method of the Huanglv-Reid population germplasm aims to develop the germplasm with high temperature resistance, drought resistance, rainy sparse sunlight resistance, high disease and lodging resistance and high yield potential in Huang-Huai-Hai spring corn areas.

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