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SNP chip used for identifying rice variety, preparation method and application

A variety identification and rice technology, applied in the application field of rice variety identification, can solve the problems of unsuitable variety rapid identification work, difficult data integration and sharing, low throughput, etc., to shorten the detection time, improve detection accuracy, improve The effect of detection level

Active Publication Date: 2015-02-04
CHINA NAT RICE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practice, this method also exposed the defects of low detection throughput and difficulty in data integration and sharing, which is not suitable for the needs of rapid identification of varieties in the future.

Method used

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  • SNP chip used for identifying rice variety, preparation method and application
  • SNP chip used for identifying rice variety, preparation method and application
  • SNP chip used for identifying rice variety, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: Preparation of RiceID3072 chip.

[0030] 800,000 SNP molecular markers were obtained based on the resequencing data of 950 rice cultivars (see website www.ncgr.ac.cn / ricehap2); bioinformatics software (Haploview) was used to screen marker SNPs according to linkage disequilibrium ( tagsnp) to obtain 10,000 SNP molecular markers; then further screening and evaluation is carried out for each site according to the following characteristics: (1) Whether the site evaluation score is above 0.6; (2) Whether the repeatability is above 99%; (3) Whether the deletion rate is lower than 3%; (4) Whether it is a single copy; (5) Not in transposons, repeat regions, etc.; (6) There are no other SNPs within 60 bp above and below the site; (7) The genome is evenly distributed. Finally, 3072 molecular markers were screened, and probes were designed according to the requirements of Illumina Infinium iSelectHD to make chips. The sequence listing of the 3072 SNP molecular markers ...

Embodiment 2

[0105] Example 2: Use of RiceID3072 chip

[0106] 1. DNA extraction

[0107] The seeds of 100 representative rice varieties were selected as the experimental materials, as shown in Table 1, and the plant genome extraction kit of QIAGEN was used to extract according to the standard procedure.

[0108] 2. DNA quality detection

[0109] Use a nucleic acid concentration analyzer and agarose electrophoresis to test the quality of the extracted DNA respectively to ensure that the extracted genomic DNA meets the relevant quality requirements, that is, the agarose electrophoresis shows a single DNA band without obvious dispersion; the nucleic acid concentration detector detects A260 / 280 between 1.8-2.0; A260 / 230 between 1.8-2.0; DNA concentration > 50ng / μl; chip detection DNA amount 200ng / sample. Dilute the DNA concentration to a working concentration of 50ng / / μl.

[0110] 3. Chip detection

[0111] Follow the Illumina Infinium gene chip detection standard procedure (Infinium HD ...

Embodiment 3

[0117] Example 3: Application of RiceID3072 in Identification of Rice Varieties

[0118] 1. Determination of the criteria for rice variety identification by RiceID3072.

[0119] Use RiceID3072 to detect the genotypes of the 3072 SNP molecular markers between the 100 rice varieties in Example 2, and obtain the 3072 gene bands respectively possessed by the 100 rice varieties. Any one of them is the test sample, and the other is the control sample, compare all the gene bands of the test sample and the control sample, and obtain the number of gene bands shared by the test sample and the control sample.

[0120] Utilize formula (1) to calculate the genetic similarity between test sample and control sample:

[0121] Genetic similarity GS = 2Nij / (Ni+Nj) formula (1) (Nei1979)

[0122] Among them, Nij is the number of bands shared by the tested variety and the control sample, Ni is the number of bands of the tested variety, and Nj is the number of bands of the control variety. Illus...

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Abstract

The invention provides a NP chip used for identifying rice variety. The chip comprises 3072 molecular markers, and the 3072 molecular markers are shown in SEQ ID NO. 0001- SEQ ID NO. 3072. The invention also provides a preparation method for the above SNP chip, and the preparation method comprises the steps: acquiring the SNP molecular markers from rice cultivar resequencing data, screening the SNP molecular markers and employing the screened molecular markers to design a probe and prepare the SNP chip. The invention also provides application of the above SNP chip to rice variety authenticity and identity identification. The provided application of the combination of the 3072 SNP molecular markers helps to greatly improve the detection accuracy, shorten the detection time and substantially improve our country identification technology level on rice variety.

Description

technical field [0001] The invention relates to a chip product composed of SNP molecular markers, a preparation method and its application in rice variety identification. Background technique [0002] Rice is the most important crop in my country and plays a pivotal role in ensuring national food security. Seeds are the source of food production, and the molecular characteristics of seeds are the key factors that distinguish crop varieties. With the development of molecular marker technology, DNA marker identification of crop varieties is the basis for carrying out variety identification, resolving variety disputes and granting new variety rights, and will also be an effective means to promote orderly competition in the seed industry. [0003] Molecular identification of varieties is an inevitable requirement for the healthy development of the seed industry: my country currently has a large number of seed operators, counterfeit and shoddy seeds are banned, the problem of de...

Claims

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Application Information

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IPC IPC(8): C40B40/06C12Q1/68
Inventor 徐群韩斌魏兴华黄学辉龚浩冯跃袁筱萍余汉勇王一平
Owner CHINA NAT RICE RES INST
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