Breeding method of three-high one-excellent maize inbred line (FQ920)

Abstract

The invention discloses a breeding method of a three-high and one-excellent maize inbred line (FQ920), which belongs to the field of maize breeding, and is characterized in that the maize inbred line (FQ920) is bred by taking an introduced Thailand germplasm Suwan-3 population as a basic material through an intra-population mixed powder gene recombination and multi-generation optimal selection inbreeding method, and the three-high and one-excellent maize inbred line (FQ920) is bred into the maize inbred line (FQ920). The intra-population mixed powder gene recombination and multi-generation optimal selection selfing comprises the following steps: (A) performing optimal plant selection and powder taking mixed sister cross on the basic material population, and performing optimal selection to obtain an S2 strain; (B) selecting strains with good resistance, excellent quality and high yield potential from the strains S2, and performing selfing to obtain strains S3; according to the method, the breeding procedure is relatively simple, the operability is high, the success probability is large, the investment of manpower and material resources is small, the bred corn inbred line (FQ920) has the characteristics of high yield, high resistance, high matching and high quality, and the assembled new corn variety has the advantages of high yield, high quality, multiple resistance, wide applicability and the like; the problems that high quality is not high, high yield is not high and high yield is not resistant to diseases are solved.

Description

technical field [0001] The invention belongs to the technical field of maize breeding, in particular to a method for breeding maize inbred lines (FQ920) with three high qualities and one excellent quality. Background technique [0002] Corn is the main crop in the world. It ranks first in the planting area and total output of corn in my country. It has an important strategic position in food security, animal husbandry development and food processing industry. To turn the seed industry well, it must be stable Or to increase the total grain production target, two must stabilize the planting area, and three must innovate in germplasm resources and breeding methods. Generally speaking, the selection, promotion and application of improved corn varieties in my country play a decisive role in the contribution of total grain production. [0003] In the 1980s, most of the corn varieties planted in my country's corn production were local varieties, which had good disease resistance but...

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Problems solved by technology

[0003] In the 1980s, most of the corn varieties planted in my country's corn production were local varieties, which had good disease resistance but low yield. Later, excellent foreign corn resources were gradually introduced for research and utilization, which made my country's corn breeding, planting area and yield all new. Domestic corn breeders have selected and bred a large number of excellent hybrid varieties from imported foreign germplasm resources, such as Danyu series, Yedan series, Nongda series, Zhengdan series, Chuandan series and Chengdan series, etc. It has made a great contribution to the increase of corn production and income in my country, but at present, the southwest corn is still in the status quo of serious homogeneity, high yield but not high quality, high yield but not disease resistance, high quality but not high yield, etc.

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