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Fresh maize heterosis group step-by-step classification germplasm improvement and breeding technology system

A technology for fresh-eating corn and heterotic groups, which is applied in the fields of plant genetic improvement, botanical equipment and methods, and applications, can solve the problems of lack of unified heterotic groups and heterotic patterns.

Inactive Publication Date: 2016-02-03
INST OF AGRI SCI ALONG YANGTZE RIVER IN JIANGSU
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Problems solved by technology

[0003] At present, there is no unified heterosis group and heterosis mode in the breeding of fresh edible waxy corn in China. The breeding method has also developed from the common corn backcross transfer method to the use of common corn germplasm hybridization to improve a certain trait gene, and gradually developed to The breeding stage of mutual improvement by using fresh corn inbred lines such as glutinous and sweet

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Embodiment Construction

[0023] A kind of heterogeneous group of fresh corn germplasm improvement and breeding technology system by step-by-step classification, comprising the following steps:

[0024] (1) Determination of germplasm: In order to achieve a leapfrog improvement in the breeding potential of fresh corn germplasm, select hybrids with excellent performance in breeding and production to participate in the basic population. According to the results of previous breeding experiments and practical breeding experience, three groups of excellent germplasm and hybrids were selected for the initial group of reincarnation selection.

[0025] (2) According to the results of breeding pedigree and molecular marker grouping, the germplasm was divided into three groups: T, H, and O: T groups can include 12 inbred lines such as Tong Line 5, T361, and W6, as well as Sushi 81301, Chaohei Nuo 1, Meiyujiatiannuo 16, Heitiannuo 168, NK1203, Mige and other glutinous and sweet corn hybrids 23, H group can include...

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Abstract

The invention discloses a fresh maize heterosis group step-by-step classification germplasm improvement and breeding technology system. The system comprises the steps of selecting of the high-quality germplasm and coeno-species of a three-group combination recurrent selection initial group, resistance selection, double haploid breeding, DH system testing, combining ability measurement, application of a DH system in breeding, combination of a second recurrent initial group, and the like. The system provided by the invention advocates to widely perform recurrent selection in respects of various pest and disease damage resistance, lodging resistance, quality, yield and the like in a multi-ecological condition, and performing group interchanging and mutual combination to polymerize valuable genes with high quality, high yield, multiple resistances, wide applicability and the like, so that excellent characteristics of a group are accumulated step by step, and the breeding performance is gradually increased.

Description

technical field [0001] The invention relates to a germplasm improvement and breeding technology system of step-by-step classification of heterozygous groups of fresh corn. Background technique [0002] Fresh corn is a new growth point of my country's economy, and its area and benefits have expanded rapidly in the past 10 years. At present, the area of ​​waxy corn, sweet corn, and sweet-waxy combined corn in my country has reached about 1.17 million ha, of which waxy corn is about 660,000 ha, of which 1 / 3 is for grain, 2 / 3 is fresh food, sweet corn is about 440,000 ha, and sweet corn is about 440,000 ha. Waxy combined corn reaches about 70,000 ha. The production of fresh corn needs to be planted all year round to supply the market in a balanced manner, and the outbreak of rough dwarf disease will cause the planting fields to fail in the season of the disease. Generally, the year of occurrence will greatly reduce production and reduce the commodity rate, threatening the effici...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 石明亮黄小兰郝德荣陆虎华薛林冒宇翔陈国清胡加如张振良周广飞孙权星程玉静
Owner INST OF AGRI SCI ALONG YANGTZE RIVER IN JIANGSU
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