High-thickness high-yield corn hybrid breeding method

Abstract

The invention relates to a method for breeding a corn hybrid with high density and yield. The female parent of parent source of the method is selected from filial generation of Zheng 58 and Huangzao 4; the male parent is selected from filial generation of Chang 7-2 mutant plant; the female parent pure lines are crossbred with the male parent pure lines respectively; and fine varieties with high appetency are selected from the first filial generation of the hybrids, and planted to select the most excellent variety with high density, high resistance and high yield in the corn hybrids, and the excellent variety is named as Beiyu 288. The planting density of the corn hybrid can reach 4,000 to 5,500 plants per mu, and the corn hybrid does not generate phenomena of hollow stem, lodging and barren ear tip, resists insects and various plant diseases such as head smut disease, spot disease, bacterial wilt disease, virus disease and so on, and has deep root systems, strong drought hardiness, strong stems to resist logging, good quality, and high yield; and the common yield per mu is 850 kg, the high yield per mu reaches over 1,000 kg, and the yield is improved by more than 10 percent.

Description

technical field [0001] The invention relates to a breeding method for high-density planting, high-resistance and high-yield hybrid corn species. Background technique [0002] In recent years, the planting area of ​​corn has been increasing continuously. As one of the main food crops in my country, it plays an important role in adjusting people's diversified food structure and developing the breeding industry. However, due to the differences in ecological environment and climate conditions, the yield of hybrid corn and parent breeding and seed production is low, which affects the expansion and promotion of hybrid corn. Generally, the planting density of hybrid corn is about 3000 plants / mu, which restricts the yield of corn. further improvement. At present, the country advocates the development of varieties with good density tolerance, high quality, disease resistance, mid-maturity, and high population yield. Therefore, it is necessary to breed high-density, high-yield, pest-...

AI Technical Summary

Problems solved by technology

However, due to the differences in ecological environment and climate conditions, the yield of hybrid corn and parent breeding and seed production is low, which affects the expansion and promotion of hybrid corn. Generally, the planting density of hybrid corn is about 3000 plants / mu, which restricts the yield of corn. further improvement of