A breeding method for fixing heterosis in apomixis of special rice

A technology of apomictic reproduction and heterosis, applied in botany equipment and methods, plant gene improvement, application, etc., to achieve high yield, excellent taste and nutritional quality, and wide adaptability

Active Publication Date: 2020-09-04
云南纳百川农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the quality and yield of rice varieties are related to quantitative traits, although resistance to diseases and insect pests is mostly a dominant trait, different resistance or the same resistance belongs to different loci, and the segregation of hybrid generations caused by meiosis leads to pure It is difficult to integrate the characteristics of high yield, high quality and multi-resistance in the line breeding method

Method used

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  • A breeding method for fixing heterosis in apomixis of special rice
  • A breeding method for fixing heterosis in apomixis of special rice

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Experimental program
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Effect test

Embodiment 1

[0025] see figure 1 , the indica rice facultative apomictic line 12-G555 was used as the female parent, and the sexual reproductive variety R808 of high-quality soft rice was used as the male parent to obtain hybrid seeds. The hybrid plants of the first generation (F1) have obvious heterosis, and the botanical and biological characteristics of the individuals are exactly the same (no fusion), and their agronomic traits are different from those of the two parents, and their fertility exceeds As the parent, the seed coat of F1 self-bred seeds is purple. When mature, the single plant is harvested, threshed, and stored in bags. Sow the first-generation (F1) seeds of the harvested hybrids, transplant individual plants, and observe in the field that the second-generation (F2) plants of the hybrids appear in unsegregated clusters, and the agronomic characteristics in the field are uniform, that is, no fusion with fixed heterosis , their agronomic traits are the same or similar to th...

Embodiment 2

[0029] see figure 2 , using the high-quality fragrant glutinous sexual variety L20 as the female parent, and the indica facultative apomictic line 12-G555 as the male parent for hybridization to obtain hybrid seeds. The hybrid plants of the first generation (F1) have obvious heterosis, and the botanical and biological characteristics of the individuals are exactly the same (no fusion). Their agronomic traits are different from those of the two parents, and their fertility exceeds As the parent, the seed coat of F1 self-bred seeds is purple, and the rice quality is fragrant and soft. When mature, a single plant is harvested, threshed, and stored in bags. Sow the first-generation (F1) seeds of the harvested hybrids, transplant individual plants, and observe in the field that the second-generation (F2) plants of the hybrids have unsegregated strains, and the agronomic characteristics in the field are uniform, that is, no fusion with fixed heterosis , their agronomic traits are ...

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Abstract

The invention discloses a breeding method for stabilizing hybrid vigour of special rice by apomixis. The breeding method particularly comprises the following steps: breeding a rice apomictic line; selecting a parent; hybridizing the selected parent; gaining a special rice clonal seed, seeding in combination, transplanting a single plant, and single-plant harvesting, threshing and bagging storage in combination when the single plant is ripe; screening a high-quality, high-yield and multi-resistant special rice agamont; and performing variety comparison. Yun Guzi 1# bred by the technology is a purple soft rice hybrid rice new product, and is extremely good in taste and nutritional quality, excellent in yielding ability, favorable in resistance and wide in applicability. Yun Guzi 2# is a purple fragrant and soft rice hybrid rice new product, and is extremely good in taste and nutritional quality, excellent in yielding ability and favorable in resistance. The special rice can be planted inboth indica type rice regions and indica and japonica rice junction regions with the altitude of 1,600 m or below in Yunnan province, and the yield is averagely increased by 40-50% than that of a conventional special rice Mojiang purple rice.

Description

technical field [0001] The invention relates to the field of plant variety breeding, in particular to a breeding method for fixing heterosis in apomixis of special rice. Background technique [0002] Utilizing the first-generation heterosis is an effective way to increase crop production, but after the first generation of hybrids, the separation of traits or fertility will occur in multiple generations, so it is necessary to reproduce and produce seeds every year, which wastes a lot of manpower and material resources. Using apomixis to fix heterosis is a lot of problems. what breeders have been hoping for. In my country, Zhao Shixu first proposed the idea of ​​using apomixis to fix rice heterosis. In 1987, Yuan Longping, a well-known hybrid rice breeder, put forward a strategic vision for the utilization of rice heterosis: that is, the sequence of utilization methods is "three-line method", "two-line method" and "one-line method", and the one-line method is to use Apomixis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01H1/02A01H1/04
CPCA01H1/02A01H1/04
Inventor 郭咏梅邵源梅
Owner 云南纳百川农业科技有限公司
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