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Breeding method and application of semi-dwarf photosensitive sterile line of a middle japonica-prone type rice

A semi-dwarf, sterile line technology, applied in the fields of application, botany equipment and methods, plant genetic improvement, etc., can solve the problems such as unclear dominant effect

Inactive Publication Date: 2012-06-13
江苏省金地种业科技有限公司
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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 semi-dwarf photosensitive sterile line of a middle japonica-prone type rice
  • Breeding method and application of semi-dwarf photosensitive sterile line of a middle japonica-prone type rice
  • Breeding method and application of semi-dwarf photosensitive sterile line of a middle japonica-prone type rice

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Experimental program
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Effect test

Embodiment 1

[0024] see figure 1 . A method for breeding semi-dwarf photosensitive male sterile line Y98149JS of intermediate japonica type rice, which is mainly constructed by the following methods:

[0025] During the normal rice growth season in Hefei, the inventors used the selected rice semi-dwarf japonica photosensitive male sterile line Y98149S as the female parent, and the indica rice high-generation line 01E1-188 carrying the rice dominant semi-dwarf mutation gene as the female parent. The male parent was artificially crossed to obtain the artificial cross F 1 seed.

[0026] During the winter blooming season in Hainan, the hybrid F 1 Plants, remove pseudo-hybrids, reproduce F 2 seed.

[0027] 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 japonica plants for stubble cutting, and...

Embodiment 2

[0032] see figure 2 . The semi-dwarf photosensitive male sterile line Y98149JS of semi-japonica 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 photosensitive male sterile line Y98149JS of intermediate partial japonica type rice semi-dwarf stem, in the process of mating hybrid rice, can reduce the F 1 Practical utility in terms of plant height.

[0035] see image 3 The semi-dwarf photosensitive male sterile line Y98149JS (plant height: 68.9 cm) selected as the intermediate japonica type rice was used as the female parent, and the indica male sterile restorer line Shuhui 527 (plant height: 118.3 cm) was used as the male parent , the hybrid rice combination [(Y98149 JS×Shuhui 527) / F 1 )] the plant height was only 94.1cm, and the plant height decreased by 20.5%.

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Abstract

The invention discloses a breeding method and application of a semi-dwarf photosensitive sterile line Y98149JS of middle japonica-prone type rice. The breeding method comprises utilizing the bred rice semi-dwarf japonica type photosensitive sterile line Y98149JS carrying rice dominant semi-dwarf mutant genes and photosensitive male sterile genes to serve as a female parent and be artificially crossed with an indica type rice advanced-line strain 01E1-188 carrying rice dominant semi-dwarf mutant genes, strictly selecting a male sterile character and an indica- japonica parting character of a single plant in a segregation population during genetic segregation generation, and breeding the successful middle japonica-prone type semi-dwarf photosensitive sterile line Y98149JS. The bred Y98149JS serves as a female parent and a rice male sterility restoring line serves as a male parent to prepare hybrid rice combination so as to be applied to rice production. The bred Y98149JS is applied to variety breeding of hybrid rice, can effectively reduce plant heights of varieties of the bred hybrid rice, improves plant form, and further improves falling resistance, stable-yield performance and the like of the bred hybrid rice combination.

Description

technical field [0001] The invention relates to a breeding method and application of rice strains. More specifically, it relates to a breeding method and application of an intermediate japonica semi-dwarf photosensitive male sterile line Y98149JS. 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 and the world. However, with the continuous deep...

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 江苏省金地种业科技有限公司