Innovative breeding method of Huanglv-Lancaster population germplasm

Abstract

The invention relates to a crop breeding method, in particular to an innovative breeding method of a Huanglv-Lancaster 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 a Lancaster population inbred line, taking the Huanglv modified population inbred line as a parent to perform backcross once, and continuously inbreeding multiple generations by a Gaodayan breeding method to breed a plurality of excellent inbred lines; confirming the selected inbred line belonging to a Huanglv-Lancaster 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-Lancaster 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, a ripe stageis early, vertical lodging resistance is high, head smut resistance is good, poor soil tolerance is achieved, dewatering speed is high, grains are low in water content, and the characters of the inbred line are superior to those of hybrid combination of an original parent and the female parent testing variety. The method aims to improve the genetic gain of Chinese specific germplasm resources.

Description

technical field [0001] The invention relates to a crop breeding method, in particular to an innovative breeding method for germplasm of Huanglan group. 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 early-maturing spring corn region of Northeast China have given up the research and utilization of the germplasm of the yellow-gained group, resulting in a significant decline in the genetic gain of my country's unique local germplasm. Moreover, in recent years, soil compaction and salinization in early-maturing spring corn areas in Northeast China have occurred alternately in spring, summer and autumn droughts. Pests and diseases such a...

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 early-maturing spring corn region of Northeast China 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, soil compaction and salinization in early-maturing spring corn areas in Northeast China have occurred alternately in spring, summer and autumn droughts, head smut, large leaf spot and corn borer and other diseases and insect pests have become increasingly serious, and the water content of grains after harvest is too high, etc. Problems keep appearing, so that most of the corn inbred lines on the market can no longer meet the needs of the current and future corn production, such as early maturation, strong erect lodging resistance, resistance to head smut, resistance to barrenness, fast dehydration speed, and low grain moisture content. There is an urgent need for germplasm resources with excellent comprehensive traits

[0003] In order to adapt to the needs of the situation and solve the problems of most corn inbred lines in the early-maturing spring corn region in Northeast China, such as low temperature tolerance, poor drought resistance, poor lodging resistance, and poor disease resistance, we proposed a new method based on the theory of maize genetics and breeding combined with breeding practices. Innovative Breeding Method of Huanglanqun Germplasm