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Breeding method and application of middle indica-tendency type rice semi-dwarf photosensitive sterile line

A photosensitive sterile, semi-dwarf technology, applied in the fields of application, botanical equipment and methods, plant genetic improvement, etc., can solve the problem of unclear dominant effect, and achieve the effect of improving lodging resistance and reducing plant height.

Inactive Publication Date: 2012-06-13
天津市农作物研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Huang Guotai and Zhou Kaida reported that Yunnan semi-dwarf strain DI is dominant dwarf, but its dominant role is not clear

Method used

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  • Breeding method and application of middle indica-tendency type rice semi-dwarf photosensitive sterile line
  • Breeding method and application of middle indica-tendency type rice semi-dwarf photosensitive sterile line
  • Breeding method and application of middle indica-tendency type rice semi-dwarf photosensitive sterile line

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Embodiment 1

[0023] see figure 1 , the breeding method of Y98149IS, a semi-dwarf photosensitive male sterile line of medium indica rice, is mainly constructed by the following methods:

[0024] During the normal rice growing season in Hefei, the selected rice dominant semi-dwarf photosensitive male sterile line Y98149S was used as the female parent, and the indica rice high-generation line 01E1-188 carrying the rice dominant semi-dwarf mutation gene was used as the male parent. Carry out artificial hybridization to obtain artificial hybridization F 1 seed.

[0025] During the winter blooming season in Hainan, the hybrid F 1 Plants, remove pseudo-hybrids, reproduce F 2 seed.

[0026] During the normal rice growing season in Hefei, planting F 2 plants. Simultaneously strict selection was carried out on the male sterility traits and indica-japonica typing traits of the plants. Select dwarf and male completely sterile partial indica plants for stubble cutting, and reproduce F 3 seed. ...

Embodiment 2

[0031] Breeding application of the medium partial indica rice semi-dwarf photosensitive male sterile line Y98149IS bred by the present invention

[0032] see figure 2 The semi-dwarf photosensitive male sterile line Y98149IS of medium indica type rice was selected as the female parent, and the male sterile restorer line of rice was used as the male parent to prepare a hybrid rice combination and apply it to rice production. The plant height of the prepared hybrid rice is effectively reduced, and the lodging resistance is improved.

Embodiment 3

[0034] The practical utility of semi-dwarf photosensitive male sterile line Y98149IS of intermediate indica type rice in reducing the plant height of hybrid hybrid F1 in the process of mating hybrid rice.

[0035] see image 3 The semi-dwarf photosensitive male sterile line Y98149IS (plant height: 66.2 cm) was selected as the female parent, and the male sterile restorer line C418 (plant height: 112.6 cm) was used as the male parent. The plant height of the hybrid rice combination [(Y98149IS×C418) / F1)] was only 91.4 cm, and the plant height decreased by 18.8%.

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Abstract

The invention discloses breeding method and application of a middle indica-tendency type rice semi-dwarf photosensitive sterile line Y98149IS. The breeding method comprises the following steps of: artificially hybridizing the japonica type rice semi-dwarf photosensitive sterile line Y98149S carrying a rice dominant semi-dwarf mutant gene and a photosensitive nuclear male sterile gene as a female parent with an indica type rice advanced line 01E1-188 carrying a rice dominant semi-dwarf mutant gene, strictly choosing male sterility and indica and japonica parting characters of plant individuals in segregation populations in genetic segregation generations to successively breed the middle indica-tendency type rice semi-dwarf photosensitive sterile line Y98149IS. The invention also discloses an application of preparing a hybrid rice combination to rice production by using the bred Y98149IS as a female parent and the rice male sterile restoring line as a male parent. The bred Y98149IS can be applied to the breeding of a hybrid rice variety, the plant height of the bred hybrid rice variety can be effectively reduced, the plant morphology is improved, and the lodging resistance, the yield stability and the like of the bred hybrid rice combination are further increased.

Description

technical field [0001] The invention belongs to the technical field of rice heterosis utilization, and relates to a method for breeding rice strains, more specifically, a method for breeding semi-dwarf photosensitive male sterile line Y98149IS of intermediate indica type rice and its application. Background technique [0002] Rice is an important food crop in many countries in the world, especially China, India, Japan and other countries. my country is the most populous country in the world, and it is also one of the main rice producing countries in the world. Rice production plays a pivotal role in my country's grain production. Rice breeding in my country has successfully utilized the recessive semi-dwarf gene derived from the Chinese indica variety Diaojiaowujian through the development of improved dwarf varieties in the 1960s and the hybridization of improved varieties in the 1970s. sd-1 and rice heterosis, greatly improving the production level of rice in my country an...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 童继平闫双勇韩傲男苏京平马忠友孙林静李素敏王胜军刘学军
Owner 天津市农作物研究所
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