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Method for preservation of pure state of hybrid plants by chemical emasculation

A plant and chemical technology, applied in the fields of botanical equipment and methods, biocides, plant genetic improvement, etc., can solve problems such as differences in sensitivity, low purity of varieties, and difficulty in fully exerting the advantages of increasing yield.

Inactive Publication Date: 2011-11-09
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of herbicides to remove impurities and preserve the purity of chemical male-killing hybrids has not been reported in the literature, especially for the removal of impurities and purity of hybrids formulated with acetolactate synthase-inhibiting chemical hybridization agents.
Chemical andricide hybrids are fully fertile even if the purity is not high, and generally do not cause disputes over seed purity. Currently, insufficient attention has been paid to improving the purity of chemical andricide hybrids, which will lead to varieties The purity is not high, and the advantage of increasing production is difficult to fully exert
[0007] Plant sensitivity to sulfonylurea, imidazolinone herbicides varies, study finds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The common wheat was used as the female parent, and the imazethapyr-resistant wheat was used as the male parent, and the parental plants were planted with a row ratio of 2:8. When the length of the young panicle of the main tiller of the female parent is 1 cm to 1.5 cm, the herbicide imazethapyr (spraying amount: 7 g imazethapyr / ha) is sprayed to induce male sterility. When the female parent is heading and the glumes are opened, artificial pollination is carried out, that is, a pull rope or a bamboo pole is used to shake the male parent to pollinate the female parent, and the seeds of the female parent row are harvested at maturity.

[0018] The gained seeds are planted, and the herbicide imazethapyr is sprayed at the seedling stage (the amount of spraying is: 70g imazethapyr / ha), the false hybrids and weeds are killed, and the true hybrids have resistance and survive.

Embodiment 2

[0020] Brassica napus cultivar AC Elect was used as the female parent, and imazethapyr-resistant rapeseed was used as the male parent, and the parental plants were planted at a row ratio of 1:2. When the maximum flower bud length of the female parent is 2.5cm-3cm, the herbicide rimsulfuron-methyl (spraying amount: 0.4mg rimsulfuron-methyl / L) is sprayed to induce male sterility. When the female parent blooms, shake the male parent to pollinate the female parent, and harvest the female parent row seeds at maturity.

[0021] The gained seeds are planted, and the herbicide imazethapyr is sprayed at the seedling stage (the amount of spraying is: 70g imazethapyr / ha), the false hybrids and weeds are killed, and the true hybrids have resistance and survive.

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Abstract

The present invention discloses a method for preservation of pure state of hybrid plants by chemical emasculation. In the method, a breed sensitive to acetolactate synthase inhibitory type herbicide is selected as female parent and a breed resistant to acetolactate synthase inhibitory type herbicide is selected as male parent, acetolactate synthase inhibitory type herbicide with activity of chemical hybridizing agent is used for processing the female parent to obtain male sterility, the male parent pollinates the female parent, the seeds of the female parent line are harvested to be cross breeds, the obtained F1 generation cross breed has herbicide resistance, after the F1 generation cross breed is planted, and acetolactate synthase inhibitory type herbicide seedling stage processing is used for removing uncrossed female parent seedling, so as to remain real cross breed. The method utilizes herbicide for preservation of pure state while realizing weeding. The method for preservation of pure state of hybrid plants by chemical emasculation provided by the present invention has more advantages than common breed in the aspect of adapted breed simplified culture requirement.

Description

technical field [0001] The invention belongs to the field of crop heterosis utilization, and relates to a production and planting method of chemical andricide hybrids, in particular to a method for removing impurities and maintaining purity of chemical andricide hybrid plants. Background technique [0002] Many crops, such as Gramineae wheat and Cruciferous Brassica napus, have different degrees of heterosis among varieties. Chemical andricide is one of the feasible ways to utilize crop heterosis. It induces male sterility in plants by applying chemical hybridization agents (or called andricides), promotes cross-pollination, and obtains plant hybrids. [0003] Chemical detasseling is currently one of the main ways to utilize heterosis in wheat. The high-efficiency chemical hybridization agent GENESIS developed by Monsanto has set off a climax of research on chemical hybridization of wheat. Domestically, chemical hybridization agents SQ-1 and BAU9403 have also been develope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04A01N47/36A01N43/50A01P13/00
Inventor 于澄宇董军刚何蓓如胡胜武
Owner NORTHWEST A & F UNIV
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