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Corn difference peel color CMS three line breeding and application thereof in mixed-planting production

A peel and difference technology, applied in the field of corn hybrid seed production, can solve the problems of complex production mode operation, low degree of mechanization, high cost, etc., and achieve the effect of being suitable for mechanized operation, simplifying production mode and ensuring quality

Inactive Publication Date: 2017-09-19
GANSU AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current corn hybrid seed production is an outcross cultivation method in which the female parent and the male parent are regularly intercropped together. This production mode is complex in operation, low in mechanization, and high in cost.

Method used

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  • Corn difference peel color CMS three line breeding and application thereof in mixed-planting production
  • Corn difference peel color CMS three line breeding and application thereof in mixed-planting production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 1. Breeding and production utilization of brown (P-bpbp) pericarp CMS male sterile line GN501 Brown A

[0052] 1) The white (pp--) pericarp CMS maintainer line GN01B with excellent comprehensive agronomic traits was used as the recurrent parent, and the maize inbred line PB502 with brown (P-bpbp) pericarp was crossed, backcrossed for 4 generations and then selfed for 2 generations. The brown (P-bpbp) pericarp maintainer line GN01 Brown B was bred;

[0053] 2) Using GN01 brown skin B as the recurrent male parent, it was paired with the isotype male sterile line GN01A of the original white (pp--) peel maintainer line GN01B, and the breeding sterility traits were stable and thorough and brown (P-bpbp) CMS male sterile line GN01 Brown A with peel traits.

[0054] 3) Mix the seeds of the white (pp--) pericarp CMS restorer line GN01R and the sterile line GN01 brown skin A according to the ratio of parent parent 1: (4-6), and then use precision seeding machinery to mix and so...

Embodiment 2

[0056] 2. Breeding and production utilization of red (P-bpbp) pericarp CMS restorer line GN501 Hongpi R

[0057] 1) The white (pp--) peel color CMS restorer line GN501R with excellent comprehensive agronomic traits was used as the recurrent parent, crossed with the maize inbred line 81162 with red (P-Bp-) peel, backcrossed for 4 generations and then selfed for 4 Generation, the red (P-Bp-) peel restorer line GN01 red skin R was bred;

[0058] 2) Mix the seeds of the red (P-Bp-) pericarp restorer line GN01 red-skin R and the white (pp--) pericarp male sterile line GN01A according to the ratio of parent parent 1: (4-6), and use The precision seeding machinery is mixed in the seed production field, and the field management is the same as the field production; the male sterile line seeds are harvested mechanically; in the process of seed processing, according to the difference in the color of the peel, combined with ear selection, manual selection and removal of red seeds (red pee...

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Abstract

The invention discloses difference peel color corn cytoplasmic male sterility three line breeding and a production and utilization method thereof. A special peel color gene is respectively introduced into a corn CMS male sterile line or a restoring line through hybridization, backcross and self-cross ways, the difference of peel color is creased between hybrid parents, sterility mixed-planting production is adopted to be combined with a seed color separation technology, and a corn hybrid seed is produced. The invention has the beneficial effects that with sterility production, an artificial emasculation process can be removed, the production cost is reduced, the hybrid seed purity is improved, and large-scale seed field management and centralized production are facilitated; with mixed-planting production, a corn hybrid seed production mode can be simplified, the seed production mechanical degree is improved, and the production cost is reduced; with seed color section, the hybrid seed purity and the seed quality can be ensured, the safe, high-efficient, intensive and mechanical production of the corn hybrid seed is realized, and the positive significance is played on ensuring the quality safety of the hybrid corn seed, reducing the production cost of the seed, and relieving rural labor shortage.

Description

technical field [0001] The invention relates to the technical field of corn hybrid seed production, in particular to the breeding of three lines of cytoplasmic male sterility (CMS) with differential peel color and its application in sterile mixed seed production. Background technique [0002] Maize is the crop with the earliest utilization of heterosis, a mature system, and the most effective popularization and promotion in the world. Seed production is an important link in the utilization of heterosis. Strict emasculation and controlled pollination are required to ensure the purity of hybrid seeds. Developed countries such as Europe and the United States generally attach importance to the effective combination of agricultural machinery and agronomy. At present, maize detasseling has been largely replaced by mechanical detasseling. With the development of my country's social economy and urbanization, the agricultural labor force is increasingly scarce, and it is difficult f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04A01H5/10
CPCA01H1/02A01H1/04A01H5/10
Inventor 方永丰孟亚雄李永生慕平
Owner GANSU AGRI UNIV
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