High-yield and high-quality breeding method for new corn hybrid variety

Abstract

The invention relates to a high-yield and high-quality breeding method for new corn hybrid variety, comprising the following steps: taking a self-bred line Guanfeng 128 with high combining ability, pure gene and far genetic relationship as a male parent and taking a self-bred line 103 as a female parent to perform the hybridization so as to prepare the high-yield, high-quality, disease-resistant and close planting resistance new corn hybrid variety Guanfeng 118; breeding the female parent 103 by building a group from three land corn varieties in America, isolating freely, mixing powder for two generations, mixing and continuously self-crossing for multiple generations; after matching the male parent self-bred line 128 with dan 340 with huangzaosi, forming a first-generation base material by crossing huangzaosi once; obtaining a second-generation seed by bagging and self-crossing; obtaining a third-generation seed by taking pollen and REID series material to cross; and then breeding by alternatively, circularly and continuously self-crossing in the north and in the south. The breeding method in the invention is reasonable and effective; the breeding progress is quick; and the bred new corn hybrid variety Guanfeng 118 has excellent quality, high yield, good disease and fall resistance, wide adaptability, wide popularization value and good development prospect.

Description

technical field [0001] The invention relates to crop breeding technology, in particular to a breeding method for new corn varieties. Background technique [0002] Maize is one of the most widely distributed major food crops in the world. Since the 1930s, all countries in the world have taken the use of hybrid vigor to breed and popularize excellent corn hybrids as an important way to increase corn yield and improve corn quality, and it has also been widely used in my country. As one of the main food crops in my country, corn plays an important role in the national economy. Over the years, in order to meet the needs of people's lives, new ways to increase corn production have been constantly sought. Due to the slow process of maize replacement and long breeding cycle, it is necessary to improve the breeding method. In the vast areas of northern my country, especially in the corn planting areas of the Huanghuaihai region, there are problems of poor disease resistance and ea...

AI Technical Summary

Problems solved by technology

In the vast areas of northern my country, especially in the corn planting areas of the Huanghuaihai region, there are problems of poor disease resistance and easy fall, which affect the stable increase of corn yield