Innovative breeding method of Huanglv-European population germplasm

Abstract

The invention relates to a crop breeding method, in particular to an innovative breeding method of a Huanglv-European population germplasm. The method includes the steps: selecting a Huanglv modifiedpopulation inbred line as one of parents, hybridizing the Huanglv modified population inbred line and an European hard grain germplasm inbred line, and continuously selfing by a Gaodayan breeding method to select a plurality of excellent inbred lines; confirming the selected inbred line belonging to a Huanglv-European 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-European population germplasm. The inbred line has the advantages that the yield of test crosscombination is 10% higher than that of the Chinese mainly-planted corn variety, and the yield stability, the adaptability, the lodging resistance, the disease resistance, the density resistance, thedrought resistance, the grain dewatering speed and the grain water content of the inbred line are superior to those of corresponding hybrid combination of the Huanglv modified population inbred line and the European hard grain germplasm inbred line. The method aims to develop Chinese early-ripe, density-resistant, drought-resistant, disease-resistant and lodging-resistant germplasm resources withhigh grain dewatering speed and low grain water content.

Description

technical field [0001] The invention relates to a crop breeding method, in particular to an innovative breeding method for the germplasm of the eucalyptus. 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 domestic maize genetics and breeding institutions have given up the research and utilization of the germplasm of the yellow 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 and rain, drought, pests and diseases in my country's main corn producing areas are frequent, and problems such as lodging, downturning, slow grain dehydration, and high grain water content are...

AI Technical Summary

Problems solved by technology

At present, due to the impact of foreign excellent germplasm resources, a large part of domestic maize genetics and breeding units have given up the research and utilization of the germplasm of the yellow 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 and rain, drought, pests and diseases in my country's main corn producing areas are frequent, and problems such as lodging, downturning, slow grain dehydration, and high grain water content are very serious, making most of the corn inbred lines on the market unable to adapt to the current And in the future corn production, there is an urgent demand for germplasm resources with excellent comprehensive traits such as early maturity, high density and drought tolerance, strong disease resistance and lodging resistance, fast grain dehydration speed, and low grain water content.

[0003] In order to meet the needs of the situation and solve the problems of poor density and drought tolerance, poor disease resistance and lodging resistance, slow grain dehydration speed and high grain water content in most of the current maize inbred lines in my country, we put forward the A method for innovative breeding of Huang Ruiqun germplasm