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Breeding method for tropical high-oil maize self-bred line

A high-oil corn, inbred line technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of difficulty in popularization and application, low yield, poor disease resistance, etc., and achieve high quality and high yield. , good resistance effect

Inactive Publication Date: 2011-10-19
FOOD CROPS RES INST YUNNAN ACAD OF AGRI SCI
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Problems solved by technology

However, because most of the germplasm used in my country is temperate zone, the high-oil maize varieties bred generally have poor disease resistance and low yield in tropical and subtropical regions of my country, so it is difficult to popularize and apply them in tropical and subtropical regions of China

Method used

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Examples

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Embodiment 1

[0020] (1) In 1996, Gaoyou 115, a temperate high-oil corn hybrid introduced from China Agricultural University (in terms of mass fraction, whole grain crude fat 8.8%) was planted in Kunming, Yunnan (25°12′ north latitude, subtropical region) for trial planting. Corn ear rot and dwarf mosaic disease, the average yield per mu is 9.4% lower than that of the common corn hybrid Huidan 4, which is popularized in a large area in Yunnan;

[0021] (2) In the same year, the tropical maize inbred line CML171 (in terms of mass fraction, whole grain crude fat 4.21%) was introduced from the Mexican International Maize and Wheat Improvement Center (CIMMYT) in Kaiyuan, Yunnan (23°71′ north latitude, subtropical region) for trial planting , showing delicate plants, disease resistance, good grain commerciality and high yield, yellow hard grains, resistance to corn spot disease, head smut, ear rot and dwarf mosaic disease, etc., and the yield reaches 316 kg / mu;

[0022] (3) In the winter of 1996...

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Abstract

The invention discloses a breeding method for a tropical high-oil maize self-bred line, and belongs to the technical field of crop breeding. In the method, temperate high-oil maize hybrids is used as a donor parent, a tropical maize self-bred line is used as a recurrent parent, one-generation cross breeding, two-generation backcross and five-generation selfing are performed, in backcross and selfing, the tropical maize self-bred line is used as a male parent in backcross and selfing, large-germ seeds are selected in each generation in backcrossing and selfing, namely seeds of which seed germ planes account for more than 3 / 4 of seed planes are selected, and the tropical high-oil maize self-bred line is bred. The tropical high-oil maize self-bred line bred by the method integrates the high oil content of temperate high-oil maize germplasm and the high resistance of tropical maize germplasm, is high in expression quality, resistance and yield, and particularly is obviously superior to the original temperate high-oil maize in aspects of stress resistance and yield, so the basis of the temperate high-oil maize germplasm is broadened, and the excellent basis is established for the breeding of high-oil maize hybrids in tropical and subtropical zones.

Description

technical field [0001] The invention belongs to the technical field of crop breeding, and in particular relates to a breeding method for tropical high-oil corn inbred lines. Background technique [0002] High-oil corn refers to a new type of high-quality corn whose grain oil content is more than 6% in terms of mass fraction (that is, in terms of mass fraction, the oil content of the grain is expressed by the content of crude fat in the whole grain), and other properties are similar to ordinary corn. Corn, while common corn contains only 3-4% oil. High-oil corn not only greatly improves the total energy level of corn grains, but also comprehensively improves its various nutritional components, and is an important source of high-energy and high-quality feed. Feed tests at home and abroad have shown that pigs raised with high-oil corn can increase the daily gain by more than 20% compared with ordinary corn feed, and reduce feed by 14%; the daily gain of chickens can be increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 番兴明谭静陈洪梅
Owner FOOD CROPS RES INST YUNNAN ACAD OF AGRI SCI
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