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Breeding method of loose-panicle fragrant rice line III

A three-line sterile line, panicle type technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of breeding the sterile line of loose-spike type fragrant rice, and increase farmers' income and economy. Benefit, strong cooperating effect

Active Publication Date: 2017-06-13
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the panicle type of the fragrant rice strains bred in China is dense, and there is no report on the breeding of the fragrant rice male sterile line with loose panicle type.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Select rice lines with loose panicle type spr8 (P1), three-line maintainer Luxiang 618B (P2), three-line CMS Jinkang A (P3), three-line early-maturing restorer Minghui 2155 (P4) and three-line late-maturing restorer Shuhui 527 (P5) is the hybrid parent;

[0025] 2) Cross P1 / P2 to get hybrid F 1 Seed to F 1 -12 means;

[0026] 3) Plant F 1 - 12 plants and 15 plants, the false hybrids are eliminated at the mature stage, and the real hybrids are mixed to get F 2 Substitute the seed to F 2 -12 means;

[0027] 4) Plant F 2 -12 plants with 3840 plants. At the heading stage, the fragrance identification of the leaves of the isolated loose panicle plants is carried out, and they are listed and marked; at the maturity stage, the seeds of the single plants with both loose panicle and fragrance are harvested separately to obtain F 3 Substitute the seed to F 3 -12 means;

[0028] 5) Strain seeding F 3 -12 seeds, 35 plants are planted for each strain, and the fragranc...

Embodiment 2

[0037] 1) Select rice lines with loose panicle type sp (P1), three-line maintainer Luxiang 618B (P2), three-line CMS Jinkang A (P3), three-line early-maturing restorer Minghui 2155 (P4) and three-line late-maturing restorer Shuhui 527 (P5) is the hybrid parent;

[0038] 2) Cross P1 / P2 to get hybrid F 1 Seed to F 1 -12 means;

[0039] 3) Plant F 1 -12 plants with 25 plants, the false hybrids are eliminated at the maturity stage, and the rest of the true hybrids are mixed to harvest, and F is obtained 2 Substitute the seed to F 2 -12 means;

[0040] 4) Plant F 2 -12 plants with 3620 plants. At the heading stage, carry out fragrance identification on the leaves of the isolated loose-eared individual plants, and mark them on the market; at the mature stage, harvest the seeds of the individual plants with both scattered ears and fragrance, and obtain F 3 Substitute the seed to F 3 -12 means;

[0041] 5) Strain seeding F 3-12 seeds, 35 plants are planted for each strain...

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Abstract

The invention discloses a breeding method of loose-panicle fragrant rice line III, belonging to the field of breeding technology of special rice sterile line. According to the breeding method, a loose-panicle rice line, a fragrant rice line-III maintainer line, a line-III sterile line, a line-III early maturing restorer line and a line-III late maturing restorer line are adopted as cross parents; and by adopting the process of hybridization and multi-generation backcrossing and by identifying the panicle type, fragrance and sterility of multiple generations and screening comprehensive characters, an excellent loose-panicle fragrant rice sterile line III is bred which has the advantages of loose panicles, strong rice fragrance, stable sterility, good combining ability and high yield of breeding, seed production and hybridization. The hybrid seeds prepared from the sterile line have high outcrossing rate, strong seed reproduction ability and good rice appearance and eating quality; and moreover, the pest and disease damage at the panicles such as green smut is obviously relieved, the dosage of pesticide can be reduced, and the farmer income is increased.

Description

technical field [0001] The invention belongs to the technical field of special rice sterile line breeding, and in particular relates to a method for breeding a three-line sterile line of loose-ear type fragrant rice. Background technique [0002] Rice ideal plant type breeding is an important direction of breeding in recent years, and one of the research focuses on ideal plant type breeding is the panicle type. Panicle type is one of the important morphological characteristics of rice. It is closely related to rice yield level and population structure. Therefore, panicle type has always been the focus of research on ideal plant type breeding and cultivation of rice. According to the branching pattern of the panicle, the angle of the primary branch, the density of spikelets and the spatial posture, the panicle type can be divided into compact panicle, spreading panicle and intermediate type ( Intermediate panicle). So far, a total of 7 panicle trait genes have been reported...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 梁康迳梁义元陈芳育郭玉春郑秀娟
Owner FUJIAN AGRI & FORESTRY UNIV
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