Method of breeding high-yield multi-resistance corn single hybrid

A single-cross, corn technology, applied in the directions of botanical equipment and methods, applications, plant genetic improvement, etc., can solve the problem of low proportion of high-quality corn single-cross planting area, unreasonable variety collocation and layout, and unmatched high-yield cultivation techniques. and other problems, to achieve the effect of excellent botanical characteristics and biological characteristics, excellent plant characteristics and good yield.

Inactive Publication Date: 2012-06-13
INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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Problems solved by technology

The main problems in corn production in this area are: slow variety replacement, low proportion of high-quality corn single-cross planting area, lack of high-yield, high-quality, suitable for medium and high altitude planting, drought-resistant and disease-resistant h

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Embodiment Construction

[0013] A method for breeding high-yielding multi-resistant single-cross maize, the steps of which are:

[0014] 1. Formulate breeding goals. According to the ecological environment and climate characteristics of Hunan and southwest regions such as mountains, barren land, and seasonal drought, formulate breeding with moderate growth period, strong resistance (drought resistance or drought resistance, disease resistance, lodging resistance), The single-cross maize with good quality, high yield and stable yield, which is suitable for large-scale planting in this area, is the breeding target.

[0015] 2. Parent selection method and process. The female parent, X990, was bred with Tie 7992 as the female parent and Zheng 58 as the male parent, and was bred through 7 consecutive generations of self-crossing through southern breeding and northern breeding; the male parent W388 was based on Dan 598 as the female parent and Dan 341 as the father The offspring of this cross were bred by ...

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Abstract

The invention discloses a method of breeding a high-yield multi-resistance corn single hybrid, which includes: firstly, setting a breeding goal, and breeding a medium- and large-ear corn single hybrid with proper growth period, high yield and stability and high stress resistance according to ecological environmental characteristics of Hunan and southwest, such as hilliness, barrenness and seasonal draught; secondly, breeding parents, wherein the female parent X990 is obtained by means of seven-generation continuous selfing via reproduction in south and breeding in north using Tie7992 as a female parent and Zheng58 as a male parent finial generation, and the male parent W388 is obtained by means of recurrent cross of Dan598 and six-generation continuous back cross and selfing via reproduction in south and breeding in north using Dan598 as the female parent and Dan341 as the male parent finial generation; and thirdly, breeding the single hybrid, using a cross combination of X990 as the female parent and W388 as the male parent after test crossing, and naming as XiangYu98 which is suitable for various places in Hunan and surrounding areas. The high-yield multi-resistance corn single hybrid is of a medium- and large-ear cultivar, leaves above each ear are narrow, light transmission in fields is fine, plants are medium, yield is high, live stems are mature, and kernel commodity is good.

Description

technical field [0001] The invention belongs to the field of hybrid corn breeding, and more specifically relates to a method for breeding a high-yield, multi-resistance single-cross maize, which can be used to breed a high-yield, multi-resistance single-cross maize suitable for planting in Hunan and southwest mountainous areas. The invention is suitable for agricultural scientific research and teaching, seed companies and other departments engaged in corn breeding, seed production research and production. Background technique [0002] Corn is the main food crop in Hunan Province and Southwest China. The ecological environment in this region is complex, the climate types are diverse, the altitude difference is large, the temporal and spatial distribution of rainfall is very uneven, and seasonal droughts are frequent; 85% of corn is planted in dry land without irrigation conditions , belonging to rain-fed agriculture. The main problems in corn production in this area are: slo...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 盛良学郗仲来刘道峰张衍宁郑美荣李文祥
Owner INST OF SUBTROPICAL AGRI CHINESE ACAD OF SCI
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