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Breeding method of japonica hybrid rice sterile line in early flowering stage

A technology for hybrid rice and sterile lines, which is applied in the fields of botanical equipment and methods, plant genetic improvement, and application, can solve the problems of difficulty in meeting planting needs, low success rate of japonica rice sterile lines, and high chance, and achieves hybrid Dominant potential, enhanced outcross-pollinating ability, effect of concentrated flowering time

Active Publication Date: 2018-11-30
CHONGQING ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large chance of cross breeding, the success rate of obtaining the target early-flowering japonica male sterile line is low. At present, only a few lines such as Chunjiang series and Zhejiang 04A have been reported, and it is difficult to meet the planting needs of different ecological and climatic conditions.

Method used

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  • Breeding method of japonica hybrid rice sterile line in early flowering stage
  • Breeding method of japonica hybrid rice sterile line in early flowering stage

Examples

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Effect test

Embodiment 1

[0030] Example 1 The breeding method of the present invention

[0031] ①In the 2012 season in Chongqing, the indica rice maintainer material 802B with local indica quality source was used to cross the northern conventional japonica rice Shennong 265. 802B was the female parent and Shennong 265 was the male parent, forming the first hybrid F l .

[0032] ②2012 Hainan compound hybrid: planting hybrid F 1 , Mixed harvest F 1 Substitution seeds; planted F in Chongqing in 2013 2 Generation, in F 2 There will be 1 / 4 of the individuals of mid-Japonica rice in the generations. 2 In the generation, the individual of the japonica rice was selected as the female parent, and the male parent was crossed with the maintainer line G46B in the dominant sterile line of rice with a wider application area to create a compound hybrid MF l Substitute materials

[0033] ③In 2013, Hainan planted MF l Substitute materials, mixed MF 1 Seed generation; MF planted in Chongqing in 2014 2 Generations, in MF 2 Sele...

Embodiment 2

[0034] Example 2 The breeding method of the present invention

[0035] ①In the 2012 season in Chongqing, the indica rice maintainer material 650B with a local indica quality source was used to cross with the northern conventional japonica rice Shennong 265. 650B was the female parent and Shennong 265 was the male parent to form the first hybrid Fl.

[0036] ②In 2012, Hainan compound hybridization: plant hybrid F1 and mix F1 generation seeds; in 2013, when the F2 generation was planted in Chongqing, the medium japonica rice individuals in the F2 generation would appear 1 / 4 individuals, and the japonica rice was selected in the F2 generation The individual is the female parent, and the maintainer line G46B in the dominant sterile line of rice with a wider application area is used as the male parent for crosses to create a compound hybrid MF1 generation material;

[0037] ③In 2013, Hainan planted MF1 generation materials and mixed MF1 generation seeds; in 2014, Chongqing was planted MF2...

Embodiment 3

[0038] Example 3 The breeding method of the present invention

[0039] ①In the 2012 season in Chongqing, the indica rice maintainer material 802B with a local indica quality source was used to cross the northern conventional japonica rice Shennong 265. 802B was the female parent and Shennong 265 was the male parent to form the first hybrid Fl.

[0040] ②In 2012, Hainan compound hybridization: plant hybrid F1 and mix F1 generation seeds; in 2013, when the F2 generation was planted in Chongqing, the medium japonica rice individuals in the F2 generation would appear 1 / 4 individuals, and the japonica rice was selected in the F2 generation The individual is the female parent, and the maintainer line G23B in the dominant sterile line of rice with a wider application area is used as the male parent for crosses to create a compound hybrid MF1 generation material;

[0041] ③In 2013, Hainan planted MF1 generation materials and mixed MF1 generation seeds; in 2014, Chongqing was planted MF2 gene...

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Abstract

The invention provides a breeding method of japonica hybrid rice sterile line in an early flowering stage. The breeding method can stably and efficiently obtain a large number of japonica hybrid ricesterile line materials in the early flowering stage, solves the problems of low frequency and high accidentality of traditional hybrid breeding methods, provides most critical material foundation andtechnical support for the development of hybrid rice, and has a good application prospect.

Description

Technical field [0001] The invention belongs to the technical field of japonica hybrid rice seed production, and specifically relates to a method for selecting and breeding japonica hybrid rice sterile lines at early flowering. Background technique [0002] Indica (indica) and japonica (japonica), as the two main subspecies of Asian cultivated rice, have obvious differences in morphological and physiological characteristics, genetic differentiation, and geographic distribution. Intersubspecific hybridization between indica and japonica has been an important way for high-yielding rice breeding. It is the strategic focus of hybrid rice breeding research. [0003] In recent years, with the widespread application of heterosis among subspecies of indica and japonica rice, the "Japonica not indica recovery" model has become the mainstream method of hybrid seed production due to its strong advantages, high yield and good rice quality. However, in actual seed production, the flowering tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01H1/02
CPCA01H1/02
Inventor 肖人鹏李经勇唐永群张现伟姚雄刘强明张巫军文明段秀建
Owner CHONGQING ACAD OF AGRI SCI
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