Method for simplifying hybrid rice seed production process and improving production efficiency

A production efficiency, hybrid rice technology, applied in the field of plant life science, rice breeding

Inactive Publication Date: 2010-09-22
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no report on the use of small-grain recessive mutations for the improvement of sterile lines at home and abroad, and there is no use of the di

Method used

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  • Method for simplifying hybrid rice seed production process and improving production efficiency
  • Method for simplifying hybrid rice seed production process and improving production efficiency
  • Method for simplifying hybrid rice seed production process and improving production efficiency

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Embodiment Construction

[0023] The preservation number CGMCC No.2741 small-grain mutant ZH-sg provided by the present invention is a small-grain mutant (ZH-sg, about 20 grams in thousand-grain weight) obtained by r-ray mutagenesis, which is affected by a single recessive gene sg Control, the sg gene does not have any adverse effects on rice plant height, tillering ability, photosynthetic ability, spikelet fertility, grain shape and so on. Because the small-grain characteristic is controlled by a single recessive gene sg, after using the mutant material to improve the sterile line hybrid rice, the F1 hybrid produced by the sterile line hybrid rice is small-grained (because the hybrid is influenced by the parent, that is, the sterile line) genotype control), if the male parent is a restorer line with a thousand-grain weight of 26 grams or more, it can be mixed sowing or even direct seeding, and at least mixed harvesting (father, female parent), especially mechanized mixed harvesting, mixed seeds after h...

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Abstract

The invention discloses a method for simplifying hybrid rice seed production process and improving production efficiency, which comprises the following steps: 1, cultivating small-grain sterile line hybrid rice having the characteristics of a small-grain mutant ZH-sg with a preservation number CGMCC No.2741; 2, combining the small-grain sterile line hybrid rice with large- and normal-grain restorer line hybrid rice to produce seeds; 3, performing mixed harvest; and 4, sorting and separating seeds. The method can save a large amount of seed producing rice field, reduce labor investment in a seed production process, simplify operation process, reduce mechanical mixing opportunities, reduce storage and transport cost and reduce the hybrid rice purchase expenses of rice farmers.

Description

technical field [0001] The invention belongs to the field of plant life sciences, and specifically relates to the technical field of rice breeding. Background technique [0002] Since hybrid rice successfully realized the utilization of heterosis in China in 1974, the method of sowing the parent (restorer) and female (sterile) plants in stages and harvesting the parent plants respectively 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 tiller ears when the male parent is harvested first, resulting in a decrease in the purity of the hybrid (mixed with some restorer lines). [0003] The use of crop ...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04A01H5/10
Inventor 朱旭东王跃星倪深陈红旗
Owner CHINA NAT RICE RES INST
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