Crossbreeding method of high-yield compact corn hybrid seed

A hybrid and compact technology, applied in the direction of botany equipment and methods, application, plant genetic improvement, etc., can solve the problems of parental breeding and seed production technology not keeping up, difficulty in realizing the high yield potential of corn, and affecting the development of corn production, etc. , to achieve the effect of strong lodging resistance, strong disease resistance and stress resistance, and high seed yield

Inactive Publication Date: 2002-09-25
CROP INST SICHUAN PROVINCE ACAD OF AGRI SCI
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AI Technical Summary

Problems solved by technology

[0003] Sichuan and southwest corn hybrids have a relatively narrow genetic basis and are limited by the production conditions and natural conditions of corn in Sichuan and South China. It is difficult to realize the high-yield potential of corn, and the stability of yield is poor. In addition, the parental breeding and seed production technology cannot keep up, resulting in a strong advantage The amount of seeds produced by hybrids is small, the genetic purity of the produced seeds is low, and the cost of seed production is high, which affects the development of corn production

Method used

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  • Crossbreeding method of high-yield compact corn hybrid seed
  • Crossbreeding method of high-yield compact corn hybrid seed
  • Crossbreeding method of high-yield compact corn hybrid seed

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Embodiment Construction

[0017] Describe the embodiment of the present invention below:

[0018] The present invention is a specific new high-matching, high-yield, multi-resistance excellent corn inbred line and its ultra-high-yielding hybrid breeding and seed production technology. The breeding steps are described as follows in conjunction with the accompanying drawings:

[0019] 1. The germplasm 16 imported from the United States was crossed with the germplasm 18 imported from the United States. After 3 generations of self-crossing, the identification of disease resistance and the determination of combining ability, and the homozygous self-crossing for 4 generations, bred high-yielding, high-matching, multi-resistance, An excellent inbred line 698-3 with good plant type and wide adaptability.

[0020] 2. Using the above-mentioned excellent inbred line 698-3 as the female parent and the excellent inbred line 200B bred by the applicant earlier as the male parent, Chengdan 23, a compact and strong domi...

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Abstract

American germ plasm 16 and American germ plasma 18 are introduced and hybridized, and through three-generation plant-selecting self-breeding, disease resistance determination, combining ability test and four-generation self-homozygosis, the excellent self-bred line 698-3 with high yield, multi-resistance and compact plant type is bred. By using self-bred line 698-3 as female parent and self-bred line 200B as male parent, the hybrid Chengdan 23 with strong heterosis is bred. The present invention has the features of high yield, compact planttype, wide adaptability, high resistance, and high seed yield.

Description

Technical field: [0001] The invention belongs to the technical field of corn heterosis utilization, and specifically relates to a high-yield, multi-resistance, high-quality corn inbred line and a breeding technology for super-high-yield hybrids thereof. Background technique: [0002] Corn is one of the main food crops in our country. It is used for food, economics and feed, and has great potential for increasing production and development prospects. In order to greatly increase the yield of corn without increasing other inputs, the commonly used and effective method is to use genetic breeding technology to select and breed strong dominant hybrids for popularization and application in production. [0003] Sichuan and southwest corn hybrids have a relatively narrow genetic basis and are limited by the production conditions and natural conditions of Sichuan and southern corn. It is difficult to realize the high-yield potential of corn and the stability of yield is poor. In addi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02
Inventor 张彪
Owner CROP INST SICHUAN PROVINCE ACAD OF AGRI SCI
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