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Seed selection method of sorghum A3 cytoplasmic male sterile line

A male sterile line and cytoplasmic technology, applied in the field of breeding, can solve the problems of restricting sorghum seed production, increasing the cost of seed production, and abortion of florets, so as to solve the epidemic of sorghum cytoplasmic specialized infection and avoid sorghum cytoplasmic Prevalence of specialized infestation diseases, effects of increasing new types of forage

Inactive Publication Date: 2013-12-25
SHANXI ACADEMY OF AGRI SCI SORGHUM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The A1 and A2 sterile lines currently used in production have problems such as abortion of florets and poor stress resistance, which increases the cost of seed production and seriously affects and restricts the production of sorghum seeds and the promotion of new varieties

Method used

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  • Seed selection method of sorghum A3 cytoplasmic male sterile line
  • Seed selection method of sorghum A3 cytoplasmic male sterile line
  • Seed selection method of sorghum A3 cytoplasmic male sterile line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] refer to figure 2 , the breeding process of A3 Jinliang 5A, with A3TX398A as the female parent, A1, A2 restorer line Jinliang 5 as the backcross male parent group to form a backcross combination, planting F1, selecting from F1 and backcrossing male parent plant height, etc. A line with similar traits was used as the backcross female parent, and Jinliang 5 was used as the backcross male parent to carry out backcrossing to obtain one generation of backcross, and then Jinliang 5 was continuously backcrossed for 6 generations to obtain agronomic traits such as plant height and panicle shape A male sterile line consistent with Jinliang 5.

Embodiment 2

[0023] refer to image 3 , A 3 The breeding process of SX-1A, with A 3 TX398A was used as the female parent, and the A1 and A2 restorer line HC356 was used as the backcrossing male parent to form a backcrossing combination, and F1 was planted, and a line similar to the height traits of the backcrossing parent was selected from the F1 as the backcrossing female parent, and continued to use HC356 was backcrossed as the backcross male parent to obtain one generation of backcross, and then HC356 was used for 6 successive backcross generations to obtain a sterile line with the same agronomic traits as HC356, such as plant height and panicle shape.

Embodiment 3

[0025] refer to Figure 4 , A 3 The breeding process of SX14A, with A 3 TX398A was used as the female parent, SX14B was used as the backcrossing male parent to form a backcrossing combination, and F1 was planted, and a line similar to the height traits of the backcrossing parent was selected from the F1 as the backcrossing female parent, and SX14B was continued to be used as the backcrossing parent Backcrossing was carried out to obtain one generation of backcrossing, and then SX14B was continuously backcrossed for 6 generations to obtain a sterile line with the same agronomic traits as SX14B, such as plant height and panicle type.

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Abstract

The invention discloses a seed selection method of sorghum A3 cytoplasmic male sterile line, The seed selection method comprises following steps, a test cross combination is obtained by taking A3TX398A as a cytoplasm source, and A1 and A2 sorghum restoring lines as male parents; F1 generation is cultivated, and fertility observation and identification is performed in blooming period so as to select a material possessing restoring?capacity on A1 and A2, and hold capacity on A3 cytoplasm; and the obtained material and A3 cytoplasm sourced TX398A are subjected to continuous backcross transformation for eight generations so as to obtain the sorghum A3 cytoplasmic male sterile line. The seed selection method of the invention is capable of providing a novel approach for seed selection of sorghum male sterile lines. The successful application of A3 cytoplasm in forage sorghum breeding and producing is capable of enriching hereditary basis of sorghum hybrid species, and increasing the types of sorghum hybrid species and the novel types of forage grass, and possesses significant importance in avoiding and eliminating the prevalence of sorghum cytoplasm specific diseases.

Description

technical field [0001] The invention belongs to the technical field of breeding, and relates to a method for selecting a sorghum A3 cytoplasmic male sterile line. Background technique [0002] Utilization of heterosis in sorghum. Since the first cytoplasmic male sterile line TX3197A was selected and bred in the United States in the 1950s, sorghum for grain use is mainly used to test and breed sorghum hybrids for grain use by using A1 and A2 cytoplasmic male sterile lines and restorer lines. . my country has gone through two major processes in sorghum breeding. The first is from the end of the 1950s to the beginning of the 1960s. The use of sorghum A1 cytoplasmic male sterile line for sorghum hybrid breeding has achieved the first level of sorghum production in my country. The main representative of the sorghum male sterile line is A 1 TX3197A, A 1 TX623A, the main sorghum hybrids bred are Jinza 4, Jinza 5, Liaoza 5 and Kangsi. The second was the use of the new sorghum A2 ...

Claims

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Application Information

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IPC IPC(8): A01H1/02
Inventor 张福跃平俊爱程庆军杜志宏吕鑫李慧明杨婷婷
Owner SHANXI ACADEMY OF AGRI SCI SORGHUM RES INST
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