Breeding method of rice blast-resistant two-line sterile line

A technology of blast resistance and sterile lines, applied in botany equipment and methods, greenhouse cultivation, plant genetic improvement, etc., can solve the problems of low rice yield, poor disease resistance, poor high temperature resistance, etc., and achieve heat exchange effect Good, increase the area, the effect of small volume

Inactive Publication Date: 2019-12-20
INST OF PLANT PROTECTION JIANGXI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for breeding rice blast-resistant two-line sterile lines, which solves the defects of low yield, poor high temperature resistance and poor disease resistance of existing rice.

Method used

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  • Breeding method of rice blast-resistant two-line sterile line
  • Breeding method of rice blast-resistant two-line sterile line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for selecting a rice blast-resistant two-line sterile line provided by the invention comprises the following steps:

[0032] 1) Using long-grain rice variety-A with high rice yield, stigma heat-resistant variety-B and high-blast-resistant variety-C as parents, make hybrid combinations FA / FB and FA / FC, respectively FAB and FAC are represented; FAB and FAC are planted, and FAB / FAC are crossed to obtain a multicross generation, which is represented by FABC; FABC is planted and F2 seeds are harvested;

[0033] 2) Sow the F2 seeds in the severely affected area of ​​rice blast, and use the induced variety to induce the disease. The high-blast resistant variety C is used as a control, from which the rice seedlings with a leaf blast incidence level of 0-1 are selected, and transplanted; heading-wax ripening stage , carry out panicle blast identification, select high resistance to rice blast and long-grain single plant, and harvest F3 seeds;

[0034]3) Sow F3 in spring...

Embodiment 2

[0041] like figure 1 and figure 2 As shown, this embodiment also discloses an artificial climate box; comprising a box body 1, a perspective window 2 is arranged on the front and rear walls of the box body, a pair of glass mirrors 3 are installed on the perspective window, and a pair of glass mirrors is placed between the pair of glass mirrors. A gap is provided to form a sealed heat exchange chamber 4 for storing air with the box body; an air outlet pipe 5 is provided at the bottom of the heat exchange chamber, an air inlet pipe 6 is provided at the top, and an air pump 7 is installed on the air outlet pipe; The trachea is externally connected to the air intake pipe, and the rear end of the air intake pipe is equipped with a cooling pack 8; the air intake pipe is also equipped with a coil pipe 9 installed in the cooling pack, and the cooling pack is provided with dry ice and ice cubes; the cooling pack A gas-liquid pipeline 10 is arranged on the outer upper part, and the ou...

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Abstract

The invention provides a breeding method of a rice blast-resistant two-line sterile line. The method includes the following steps that a long-grain high-head-rice-yield rice variety A, a variety B with high-temperature-resistant stigmas and easy-to-produce seeds, and a high-blast-resistance variety C serve as parents for producing hybridized combinations FA / FB and FA / FC which are represented by FAB and FAC respectively; FAB and FAC are planted, and FAB / FAC are hybridized to obtain a cross breeding generation represented by FABC; FABC is planted and F2 seeds are harvested; the sterility and reproductivity of a selected two-line sterile line Fs7 generation are identified by adopting an artificial climate box, a low-thermal-sensitive two-line sterile line serves as a control, and a low-thermal-sensitive two-line sterile line with the fertility and stability better than those of the control and with a low critical temperature is selected; the step of identifying the fertility, the head rice rate, the resistance and the seed production outcrossing rate is repeated, and finally the long-grain two-line sterile line which is high in head rice rate, good in outcrossing characteristic, stable in fertility, good in disease resistance and good in excellent in comprehensive property and can produce high-temperature-resistant seeds is obtained.

Description

technical field [0001] The invention relates to the field of rice breeding technology, in particular to a method for breeding rice blast-resistant two-line sterile lines. Background technique [0002] At present, rice is one of the main food crops in my country and even in the world, so it is particularly important to increase rice yield. Among them, high yield, high quality and disease resistance are important breeding goals of hybrid rice. The problems existing in the current process of rice heterosis utilization are becoming more and more obvious, concentrated in a series of problems such as small increase in per unit yield, no breakthrough in rice quality and resistance, and high risk in hybrid rice seed production. The weather is becoming more and more frequent, which brings great risks to rice production. For example, the low temperature in summer seriously affects the safety of two-line rice seed production; high temperature conditions restrict the yield and seed ger...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04A01G9/18A01G9/24
CPCA01G9/18A01G9/246A01H1/02A01H1/04Y02A40/25
Inventor 兰波杨迎青黄俊宝李湘民
Owner INST OF PLANT PROTECTION JIANGXI ACAD OF AGRI SCI
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