A Method of Breeding New Maize Varieties Using X Group and Huangrui Group Heterogenetic Patterns

Abstract

The present invention relates to a crop breeding method, in particular to a method for breeding a new corn variety using the hybrid model of X group and Huangrui group, comprising the following steps: ① Selecting a hybrid of X group inbred line and Huangrui group inbred line; ② Combining The parent of the Huanggai group inbred line of the Huangrui group inbred line, the parent of the improved Ruide group inbred line and the X group inbred line were used as control hybrids; the current main corn varieties in my country were selected as the control; Repeated planting, identification of traits such as high yield, lodging resistance, stem rot resistance, small spot disease resistance, high temperature and drought resistance, and resistance to rain and low light, etc., compared with the current main corn varieties in my country, the yield is increased by more than 10%, and the comprehensive traits are better than the corresponding control hybrids The hybrids of these species are new hybrid combinations selected and bred. The breeding method of the present invention produces maize hybrids with excellent comprehensive properties such as high yield, lodging resistance, stem rot resistance, small spot resistance, high temperature and drought resistance, and resistance to cloudy and rainy sunlight, and the yield is more than 10% higher than that of the current main varieties.

Description

technical field [0001] The invention relates to a crop breeding method, in particular to a method for breeding a new corn variety by using the X group and Huangrui group heterotopic models. Background technique [0002] The heterosis model (referred to as the heterosis model) is the theoretical basis to guide the combination of superior maize hybrids, and the innovation of the model is of great significance to the improvement of high yield, stable yield and stress resistance of maize hybrids in my country. The heterotopic patterns of the main corn varieties in the Huanghuaihai spring corn region are basically improved Ruide × Huanggai, which has the problem of a single heterozygote pattern and a narrow genetic basis. There are one or more deficiencies in traits such as resistance to small spot disease, high temperature and drought resistance, and resistance to rain and little sunshine, which are prone to risks such as large-scale lodging, outbreaks of diseases and insect pest...

AI Technical Summary

Problems solved by technology

The heterotopic patterns of the main corn varieties in the Huanghuaihai spring corn region are basically improved Ruide × Huanggai, which has the problem of a single heterozygote pattern and a narrow genetic basis. There are one or more deficiencies in traits such as resistance to small spot disease, high temperature and drought resistance, and resistance to rain and little sunshine. It is very prone to risks such as large-scale lodging, outbreaks of diseases and insect pests, high temperature, drought, floods, reduced production or even complete production, which seriously affects my country's food security.