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Method for improving seed production efficiency of hybrid rice through large-scale improvement of restorer seeds

A technology of hybrid rice and restorer line, applied in the field of plant life science and rice breeding, can solve the problem of no mixed harvesting, and achieve the effects of reducing labor, saving seed production paddy fields, and saving labor.

Inactive Publication Date: 2011-07-20
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, at home and abroad, there is no any report on the use of large-grain materials for the improvement of restorer lines, except for the inventor's two invention applications (application number CN 200910096400.6, which was applied for on February 26, 2009, "improving sterile lines through grain miniaturization) Hybrid rice seed production efficiency method" and application number CN 200910300956.2, "A method for simplifying hybrid rice seed production procedure and improving seed production efficiency" applied on March 19, 2009), also did not use the difference in grain size for mixed harvesting , and using the size of the seeds themselves to sort hybrids and male parents in the form of mesh screens and reports and inventions

Method used

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  • Method for improving seed production efficiency of hybrid rice through large-scale improvement of restorer seeds
  • Method for improving seed production efficiency of hybrid rice through large-scale improvement of restorer seeds
  • Method for improving seed production efficiency of hybrid rice through large-scale improvement of restorer seeds

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) Breeding of large-grain restorer hybrid rice

[0044] Taking Minghui 63 as the recipient parent and Jiahuasi as the donor parent as an example, the embodiment of the present invention will be described below.

[0045] 1. Using Jiahuasi as a donor to cross with the common restorer line Minghui 63 to obtain a hybrid F1′, the grain size of which is between Jiahuasi and Minghui 63, to plant the hybrid F1′ to obtain F2′, which is contemporary The 1000-grain weight of the seeds produced on the F2′ generation plants was normal, and some individuals carrying the Jiahuasi gene of the large-grained material and exhibiting large-grained individuals were isolated from the F2′ generation seeds. Continue to select to form F3' lines (or choose a single plant with large grains and backcross with Minghui 63 once). In the F3' line, select the individual plant with large grain and test cross with the sterile line. On the basis of the test cross of F3' single plant is the recovery of ...

Embodiment 2

[0052] (1) Breeding of large-grain restorer hybrid rice

[0053] Taking Minghui 63 as the recipient parent and Jiahuasi as the donor parent as an example, the embodiment of the present invention will be described below.

[0054] With embodiment 1.

[0055] (2) Seed production of large-grain restorer line and sterile line hybrid rice

[0056] When the small-grain male sterile line hybrid rice and the large-grain or normal-grain type restorer hybrid rice are used for hybrid seed production, if the growth period of the sterile line (shorter growth period) and the restorer line (longer growth period) are different Within 10 days, such as 9A in the sterile line, you can use the sterile line without germination and the restorer line for mixed seeding, or directly mixed seeding or mixed transplanting. The male parent (restorer line) and the female parent (sterile line) do not need to be cut off separately after flowering, but can be mixed with a harvester.

[0057] (3) Cleaning an...

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Abstract

The invention belongs to the field of plant life sciences, and discloses a method for improving the seed production efficiency of hybrid rice through large-scale improvement of restorer seeds. The method comprises the following steps of: (1) cultivating large-grain restorer hybrid rice with characteristics of rice (oryza sativa) cgmcc no.3461; (2) performing grouped seed production of the large-grain restorer hybrid rice and small-grain normal grain type sterile line hybrid rice; (3) performing mixed harvesting; and (4) cleaning and separating seeds. According to the method, a large amount of seed production rice fields can be saved, the labor input in the seed production process can be reduced, the operating procedure can be simplified, and the opportunity of machine congestion can be reduced, so that the seed production cost is reduced, the seed purchase cost of rice farmers is reduced, and the income of the rice farmers is increased.

Description

technical field [0001] The invention belongs to the field of plant life sciences, specifically relates to the technical field of rice breeding, and more specifically relates to a method for increasing hybrid rice seed production efficiency through the large-scale improvement of restorer line grains. Background technique [0002] Since hybrid rice successfully realized the utilization of heterosis in China in 1974, the method of sowing the parent (restorer line) and female (sterile line) plants in stages and harvesting the parent plants separately has been used until now. Sowing and harvesting the parental parents in stages is not only cumbersome to operate, but also increases the cost of labor input. In the process of seed production, the male parent is using "gibberellin (GA3)" for good cross-pollination posture. After treatment, the plants are higher than the female parent and are more prone to lodging, making it difficult to remove the lodging plants or a few lodging till...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
Inventor 朱旭东倪深陈红旗王跃星
Owner CHINA NAT RICE RES INST
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