Breeding method of erect panicle type long stigma and elongated upmost internode three-line sterile line

A three-line sterile line, long panicle neck technology, applied in the directions of botanical equipment and methods, application, plant genetic improvement, etc., can solve the problems of decreased seed viability, environmental pollution, increased cost, etc., and improved seed production yield. , the effect of reducing production costs and increasing economic benefits

Active Publication Date: 2015-05-06
湖南神农大丰种业科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the male sterile line of the three-line hybrid rice currently popularized and applied in production has a serious phenomenon of neck wrapping and ear wrapping. In seed production, gibberellin (commonly known as 920) needs to be sprayed to solve the ear wrapping problem. However, spraying gibberellin is not only Increased the cost of seed production, but also caused environmental pollution and reduced seed viability, while the long-neck CMS line containing the eui gene can achieve genetic removal of the neck-wrapped ear, and the CMS line for seed production can use no or less red Mycin, so that the cost of hybrid rice seed production is reduced, seed quality is improved and environmental pollution is reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) The rice variety Shennong 265 (A) with erect panicle, the rice variety Hai B (B) with long stigma, and the rice variety IR68902eB1 (C) with long panicle neck were selected as the parents for the target traits, and the recurrent parent of Longtepu B (R) was used as the parent. Cross A / B to get cross F 1 Substitute, with F 1-AB express;

[0020] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0021] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , a population of 1800 plants, the plants with erect panicle, long stigma and long neck traits were screened and marked at the heading and flowering stage, and single plants were harvested at the maturity stage (F 3-ABC );

[0022] 4) Planting the line 3) The resulting F with the traits of erect panicle, long stigma and long neck 3-ABC , 30 plants were planted for each line, and 2 lines with erect panicle, long stigma and long neck traits and no segr...

Embodiment 2

[0030] 1) Select the rice variety Shennong 265 (A) with erect panicle, the rice variety HaiB (B) with long stigma, and the rice variety IR68902eB1 (C) with long panicle neck as the parents for the target traits, and the flower 2B as the recurrent parent (R) for hybridization A / B, get hybrid F 1 Substitute, with F 1-AB express;

[0031] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0032] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , a population of 1900 plants, the plants with the traits of erect panicle, long stigma and long neck were screened at the heading and flowering stage, and the plants with the traits of erect panicle, long stigma and long panicle neck were screened and marked, and the seeds were harvested from a single plant at the maturity stage (F 3-ABC );

[0033] 4) Planting the line 3) The resulting F with the traits of erect panicle, long stigma and long neck 3-ABC , 30 plants w...

Embodiment 3

[0041] 1) The rice variety Shennong 265 (A) with erect panicle, the rice variety HaiB (B) with long stigma, and the rice variety IR68902eB1 (C) with long panicle neck were selected as the parents for the target traits, and Minbiao 1B was the recurrent parent (R). Cross A / B to get cross F 1 Substitute, with F 1-AB express;

[0042] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0043] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , a population of 2000 plants, the plants with the traits of erect panicle, long stigma and long neck were screened at the heading and flowering stage, and the plants with the traits of erect panicle, long stigma and long panicle neck were screened and marked, and the seeds were harvested from a single plant at the maturity stage (F 3-ABC );

[0044] 4) Planting the line 3) The resulting F with the traits of erect panicle, long stigma and long neck 3-ABC , 30 plants were p...

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Abstract

The invention discloses a breeding method of an erect panicle type long stigma and elongated upmost internode three-line sterile line, belonging to the technical field of rice sterile line breeding. According to the method, an erect panicle type rice variety Shennong 265, a long stigma rice variety Hai B and an elongated upmost internode rice variety IR68902eB1 are taken as target trait providing parents, a superior three-line maintenance line which is large in popularization area in production is taken as a recurrent parent, and the three-line sterile line which has the characters including erect panicle, long stigma and elongated upmost internode at the same time can be bred by hybridization, multiple-crossing and backcross transformation, and the agronomic trait and the yield trait of the three-line sterile line are close to those of the original sterile line. The three-line sterile line does not have sheathed panicle, and is high in stigma exposure rate and outcrossing rate; after three-line hybrid rice is prepared by the three-line sterile line, the seed production yield of the hybrid rice is improved, the production cost is lowered, and the environmental pollution is reduced.

Description

technical field [0001] The invention specifically relates to a method for selecting a three-line sterile line with erect panicle, long stigma and long panicle neck, and belongs to the technical field of rice sterile line breeding. Background technique [0002] Dwarf breeding and hybrid rice breeding are two major leaps in my country's rice science and technology revolution, which have greatly increased my country's rice production and basically solved the problem of food and clothing for the people of the country. However, the male sterile line of the three-line hybrid rice currently popularized and applied in production has a serious phenomenon of neck wrapping and ear wrapping. In seed production, gibberellin (commonly known as 920) needs to be sprayed to solve the ear wrapping problem. However, spraying gibberellin is not only Increased the cost of seed production, but also caused environmental pollution and reduced seed viability, while the long-neck CMS line containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 章清杞陈幼玉王和寿倪济民李晓燕
Owner 湖南神农大丰种业科技有限责任公司
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