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Breeding Method of Two-line CMS Lines with Erect Ear, Long Stigma and Long Neck

A technology with long panicle neck and long stigma, which is applied in the field of rice part and line breeding, can solve the problems of increasing cost and environmental pollution, and achieve the effects of increasing economic benefits, reducing production costs, and high stigma exposure rate

Active Publication Date: 2016-01-27
GUANGXI ZHAOHE SEED IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the male sterile lines of the two-line hybrid rice that are popularized and applied in production at present have severe ear wrapping. In seed production, gibberellin needs to be sprayed to solve the ear wrapping problem, which not only increases the cost of seed production, but also causes environmental pollution. , the breeding of two-line male sterile lines with long panicle neck can achieve genetic release or alleviate panicle wrapping, without or less use of gibberellin, so that the seed production cost of hybrid rice can be reduced, seed quality can be improved and environmental pollution can be reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Select the rice variety 259 (A) with erect panicle, the rice variety HaiB (B) with long stigma, and the rice variety Longtepu eB1 (C) with long panicle neck as the parents for the target traits, and the excellent two lines with large promotion area in production The CMS line Guangzhan 63S is the recurrent parent (R), crossed A / B, and obtained the crossed F 1 Substitute, with F 1-AB express;

[0021] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0022] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , the population size was 2000 plants, the traits of erect panicle, long stigma and long panicle neck were identified 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 single plants were harvested at the maturity stage (F 3-ABC );

[0023] 4) Planting of the line 3) The obtained F with the traits of...

Embodiment 2

[0032] 1) Select the rice variety 259 (A) with erect panicle, the rice variety HaiB (B) with long stigma, and the rice variety Longtepu eB1 (C) with long panicle neck as the parents for the target traits, and the excellent two lines with large promotion area in production CMS line Y58S is the recurrent parent (R), cross A / B, and get cross F 1 Substitute, with F 1-AB express;

[0033] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0034] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , the population size was 2300 plants, the traits of erect panicle, long stigma and long panicle neck were identified 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 single plants were harvested at the maturity stage (F 3-ABC );

[0035] 4) Planting of the line 3) The obtained F with the traits of erect panicle, long stigm...

Embodiment 3

[0044] 1) Select the rice variety 259 (A) with erect panicle, the rice variety HaiB (B) with long stigma, and the rice variety Longtepu eB1 (C) with long panicle neck as the parents for the target traits, and the excellent two lines with large promotion area in production The male sterile line Pei'ai 64S is the recurrent parent (R), crossed A / B, and obtained cross F 1 Substitute, with F 1-AB express;

[0045] 2) Planting hybrid F 1 generation, crossed F at flowering stage 1-AB / C, have to redo F 1 , with F 1-ABC express;

[0046] 3) Plant F 1-ABC , F 2-ABC , planting F 2-ABC , the population size was 2500 plants, the traits of erect panicle, long stigma and long neck were identified at the heading and flowering stage, and the plants with the traits of erect panicle, long stigma and long neck were screened and marked, and the seeds were harvested from individual plants at the maturity stage (F 3-ABC );

[0047] 4) Planting of the line 3) The obtained F with the traits...

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Abstract

The invention discloses a method for breeding two-line sterile lines with erect panicle, long stigma and long panicle neck, and belongs to the technical field of rice sterile line breeding. In this method, rice varieties with erect panicles, rice varieties with long stigma, and rice varieties with long panicle necks are used as parents for target traits, and excellent two-line male sterile lines with a large promotion area in production are used as recurrent parents. and other technical methods, these three kinds of rice beneficial special trait genes were backcrossed into the recurrent parents of the two-line male sterile line, and the agronomic traits, sterility transition temperature, and sterility were highly consistent with the two-line male sterile line recurrent parents. , and a special two-line male sterile line with erect panicle, long stigma and long panicle neck at the same time. Using it to prepare two-line hybrid rice can increase hybrid rice seed production yield, reduce cost and reduce pollution.

Description

technical field [0001] The invention specifically relates to a method for selecting a two-line sterile line with erect panicle, long stigma and long panicle neck, and belongs to the technical field of rice part and line breeding. Background technique [0002] The dwarf breeding in the 1960s increased the rice yield in my country by 30%, and the three-line hybrid rice successfully bred in the 1970s increased the yield by 20% compared with the dwarf rice. These are two major leaps in my country's rice science and technology revolution. The two-line hybrid rice successfully bred in the 1990s has further increased the rice yield in my country. However, the male sterile lines of the two-line hybrid rice that are popularized and applied in production at present have severe ear wrapping. In seed production, gibberellin needs to be sprayed to solve the ear wrapping problem, which not only increases the cost of seed production, but also causes environmental pollution. , Breeding th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
Inventor 章清杞黄艺敏陈幼玉李晓燕陈志伟
Owner GUANGXI ZHAOHE SEED IND
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