Method for cultivating photo-temp. sensitive type male nuclear sterile rice

A breeding method and nuclear sterile technology, which is applied in the field of breeding light-temperature-sensitive male sterile rice germplasm, can solve problems such as poor grain filling, shortened breeding cycle, and reduced breeding costs, so as to improve predictability and breeding Effects of low efficiency, chalky rice rate and chalkiness, and shortened breeding cycle

Inactive Publication Date: 2007-01-31
RICE RES INST GUANGDONG ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Not only can the breeding cycle of the traditional two-line male sterile line selection method be shortened by nearly 1 time; but also the breeding efficiency of the two-line male sterile line can be greatly improved, especially the two-line male sterile line selected by the traditional method can be effectively overcome. There are common problems in the late growth period, such as poor color change and premature senescence of the upper functional leaves, poor lodging resistance of stems, two-stage filling problems, poor grain filling, and poor appearance and quality of brown rice. There is no need for off-site breeding, so the breeding cost can be greatly reduced

Method used

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  • Method for cultivating photo-temp. sensitive type male nuclear sterile rice
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  • Method for cultivating photo-temp. sensitive type male nuclear sterile rice

Examples

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Effect test

Embodiment 1

[0084] Example 1: Light and temperature sensitive genic male sterile rice germplasm Yueguang S and

[0085] The breeding process of Yueguang 2S

[0086] Taking Guangzhou as an example to describe the implementation process of cultivating light-temperature-sensitive GMS rice germplasm Yueguang S and Yueguang 2S in the present invention:

[0087] In the early season of 1997, hybrids were produced using the warm hot zone male method, and in the late season of 1997, F 1 Generations; 1998 Early Planting F 2 generations, and in the F 2 In each generation, select excellent target fertile individual plants with different maturity types, dwarf stalks with strong lodging resistance, high yield, good upper functional leaf color change at maturity, no obvious two-stage grain filling, translucent or transparent appearance of brown rice13 indivual. 1998 Late Season Planting F 3 Generation 13 strain populations, among which 6 male sterile plants appeared in 42 individual pla...

Embodiment 2

[0088] Example 2: Light and temperature sensitive genic male sterile rice germplasm Yueguang 3S and

[0089] The breeding process of Yueguang 4S

[0090] Taking Guangzhou and Sanya City, Hainan Province as examples, the implementation process of cultivating light-temperature-sensitive GMS rice germplasm Yueguang 3S and Yueguang 4S in the present invention is described:

[0091] In the winter of 2000, the light-temperature-sensitive genic sterile rice germplasms "Yueguang S" and "Peiai 64S" were planted under low-temperature and short-day ecological conditions in Sanya City, Hainan Province. At the beginning of March 2001, "Yueguang S" and "Peiai 64S" headed and flowered, and both showed male fertility. "Yueguang S"×"Pei'ai 64S" reciprocal hybrid combination was prepared by warming and killing males.

[0092] The following breeding generations were completed under the ecological conditions of high temperature and long days in Guangzhou.

[0093] "Yueguang S"×"Pei...

Embodiment 3

[0094] Example 3: Breeding process of light-temperature-sensitive genic male sterile rice germplasm Yueguang 5S

[0095] Take Guangzhou and Sanya City, Hainan Province as examples to describe the implementation process of the present invention's cultivation of light-temperature-sensitive genetic male sterile line rice germplasm Yueguang 5S:

[0096] In the winter of 2000, the light-temperature-sensitive genic sterile rice germplasms "Annong S" and "Yueguang B" were planted under low-temperature and short-day ecological conditions in Sanya City, Hainan Province. At the beginning of March 2001, "Annong S" and "Yueguang B" headed and flowered, and both showed male fertility. The "Annong S"×"Yueguang B" hybrid combination was prepared by the method of warming and killing males.

[0097] The following breeding generations were completed under the ecological conditions of high temperature and long days in Guangzhou.

[0098] "Annong S"×"Yueguang B" hybrid F planted in the late sea...

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Abstract

A method for culturing the photosensitive and temp-sensitive male karyosterile paddy rice includes such steps as selectively culturing F2-Fn generations of photosensitive and temp-sensitive karyosterile paddy rice, selectively culturing the male fertile plant with target characteristics, selectively culturing the single male sterile plant from FN+1 generation, putting it in the condition of male recovery fertile expression, and reproduction of the seeds of said karyosterile paddy rice. Its advantage is short culturing period reduced by one time.

Description

technical field [0001] The invention relates to a method for cultivating light-temperature-sensitive male sterile rice germplasm, and belongs to the technical field of rice heterosis utilization. Background technique [0002] At present, the main ways to utilize heterosis in indica rice at home and abroad include the three-line method (sterile line, maintainer line, restorer line) based on nucleoplasmic interaction such as the wild type or red lotus type, and the two-line method based on light and temperature sensitive conditions. Law. Since 1973, when my country was the first in the world to realize the three-line combination of indica hybrid rice, my country has maintained a world-leading level in the field of rice heterosis utilization research. In the 1970s and 1980s, my country's production of Shangshanyou system and Weiyou system three-line hybrid rice developed rapidly; in the 1990s, my country's Shanyou, Weiyou, Gangyou, IIyou, Youyou, Boyou A total of hundreds of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/00
Inventor 李传国梁世胡宋进昌
Owner RICE RES INST GUANGDONG ACADEMY OF AGRI SCI
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