An innovative breeding method for germplasm of Huanglan group

Abstract

The invention relates to a crop breeding method, in particular to an innovative breeding method for the germplasm of the Huanglan group, comprising the following steps: selecting the inbred line of the Huangai group as one of the parents, hybridizing with the inbred line of the Lancaster group, and using the inbred line of the Huangai group Backcross one time for the parent, several excellent inbred lines were bred through continuous self-crossing for multiple generations through the Gao Dayan line selection method; using SSR molecular marker technology to confirm that the selected inbred lines belonged to the Huanglan group; selected from the X group The test cross is used as the female parent of the test species; the test cross is used as the control of the current main corn varieties in my country, and the multi-point multi-row area is repeatedly planted. The yield of the selected test cross combination is 10% higher than that of the main corn varieties in my country, and the maturity period is early. , strong erect lodging resistance, head smut resistance, barren resistance, fast dehydration speed, low grain water content and other traits are superior to the original parent and female parent test species hybrid combination inbred line, that is, Huanglanqun new germplasm. The method of the invention is aimed at improving the genetic gain of my country's unique 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