CN116574833B - Application of PARMS molecular marker or marker combination of rape thousand seed weight associated site qSW.A1-2 - Google Patents
Application of PARMS molecular marker or marker combination of rape thousand seed weight associated site qSW.A1-2 Download PDFInfo
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Abstract
The invention belongs to the technical field of biological breeding, in particular to application of a rape thousand seed weight associated PARMS molecular marker or marker combination, and applicant screens two thousand seed weight associated sitesqSW.A1‑2AndqSW.C1‑2the peak SNP markers Bn-A01-p19633815 and Bn-scaff_17827_1-p897345 of the rape A01 chromosome are located at base 16,462,971 and base 7,804,227 of the C01 chromosome respectively, which on average can explain 8.4% and 6.4% of the phenotypic variation, the average effect being 0.24 and 0.19 g. The PARMS markers developed by the two SNP are used for detecting the rape related population, the operation is simple and convenient, the typing is clear, the difference value of thousand grain weight of the two homozygous genotypes is 0.21 g and 0.29 g respectively, and the combination of the two homozygous genotypes is up to 0.47 g, so that the rape related population has good selection effect.
Description
Technical Field
The invention belongs to the technical field of biological breeding, and particularly relates to application of PARMS molecular markers or marker combinations of a locus qSW.A1-2 associated with thousand seed weight of rape.
Background
Under the same planting density condition, the single yield of rape depends on the single plant yield, and the single plant yield is directly determined by three constituent factors of the number of the whole plant fruits, the number of grains per corner and the grain weight. Although there is a negative correlation to some extent between the three components of rape yield, the coefficients are often not large, and thus yield can be increased by increasing the yield components (e.g. grain weight). From the practical aspect of breeding, the increase of rape unit yield can be realized by improving the constitution factors such as grain weight. At present, the thousand seed weight of rape varieties is generally lower than 4g, and the maximum value of the thousand seed weight in rape germplasm resources can exceed 8 g (Chen Wei and the like, 2011), which indicates that the rape seed weight still has a large lifting space.
With the rapid development of modern biotechnology, the molecular marker technology is also updated and iterated continuously, and the initial RFLP, RA PD/AFLP and SSR are gradually developed into the current SNP markers. The current SNP detection methods are mainly divided into two main categories: one general class is the traditional classical detection methods based on gel electrophoresis, represented by single-strand conformational polymorphism (SSCP), denaturing gradient gel electrophoresis (DDGE), cleaved Amplified Polymorphic Sequences (CAPS), allele-specific PCR (AS-PCR), etc.; another major class is high throughput, high degree of automation detection methods represented by direct sequencing, DNA chips, denaturing High Performance Liquid Chromatography (DHPLC), mass spectrometry detection techniques, high resolution dissolution profiles (HRM), and the like. The two methods have advantages and disadvantages, and detection methods combining the two methods, such as KASP (Lister et., 2013) and PARMS (Lu et al, 2020) are available at present, so that the method is simple to operate, low in cost and capable of realizing high-flux detection.
Grain weight is a complex quantitative trait typically controlled by multiple genes, and phenotypes are continuously distributed and susceptible to environmental conditions. The inheritance of grain weight is mainly additive, dominant and superior, so that its heterosis is weak, and the grain weight of hybrid F1 is generally between parents (Li Na, 2015). The combination of quantitative genetics and molecular marker technology can break down complex quantitative traits into individual quantitative trait loci (quantitative trait loci, QTL) and then study multiple genes that control quantitative traits as quality traits. QTL localization is based on genetic segregating populations, and quantitative trait phenotype data of segregating populations are analyzed by means of QTL mapping software by means of molecular markers and genetic maps, so that the position and effect of quantitative trait genes on chromosomes are determined. Currently, with the methods of linkage mapping (linkage ma mapping) and association mapping (association mapping), there are a limited number of QTLs that work in different populations and environments, but it is difficult to meet practical breeding requirements, when rape seeds have been mapped to more than one hundred thousand grain weight QTLs (quejada et al, undell et al, 2006;Radoev et al, 2008, shi et al, 2009, wang Feng et al, 2010;Basunanda et al, 2010, fan et al, 2010, zhang et al, 2011, zhao Weiguo et al, 2017).
The invention utilizes thousand seed weight data of 10 environments of rape natural population to carry out whole genome association analysis, aims at finding a new stable site with improvement effect on thousand seed weight of rape, develops a practical molecular marker with high flux and low cost for auxiliary selection according to the new stable site, and lays a foundation for subsequent whole genome selection breeding.
Disclosure of Invention
The invention aims at providing a locus qSW.A1-2 on a rape A01 chromosome and obviously related to grain weight, wherein a peak SNP marker Bn-A01-p19633815 is positioned at 16,462,971 th base of a rape DarmorV4.1 reference genome A01 chromosome.
Another object of the present invention is to provide a combination of qSW.A1-2 and qSW.C1-2 sites associated with thousand seed weight of rape, wherein the peak SNP markers Bn-A01-p19633815 and Bn-scaff_17827_1-p897345 are located at 16,462,971 th base and 7,804,227 th base of chromosome A01 and C01 chromosome of the reference genome A01 of rape DarmorV4.1, respectively.
It is still another object of the present invention to provide a PARMS marker primer for the above SNP.
The invention also provides an application of the PARMS marked primer in rape thousand seed weight selection breeding.
In order to achieve the above object, the present invention adopts the following technical measures:
acquisition of SNP loci related to thousand seed weight of rape:
(1) Total DNA of 331 lines of the canola associated population was extracted and genotyping was performed on each sample using a canola 60K SNP chip (Li et al 2020).
(2) The deletion rate (transmission rate), heterozygosity rate (heterozygous rate), secondary allele frequency (minor allele frequency) of the population material at each site was calculated using Illumina BeadStudio genotyping software (http:// www.illumina.com /).
(3) And (3) planting 331 strains of the related population in 10 environments respectively, picking 10 single plants with uniform growth vigor in each cell in the mature period, harvesting, threshing the single plants respectively, sun-drying seeds for thousand-grain weight investigation, and calculating the average value of each strain.
(4) Full genome association analysis was performed using the high density SNP genotype data of the associated population, thousand grain weight phenotype data of 10 environments, population structure and kindred relationship using TASSEL 5.0 software (braddury et al, 2007). Finally, the sites qSW.A1-2 and qSW.C1-2 with remarkable correlation with the grain weight are obtained, the peak SNP markers Bn-A01-p19633815 and Bn-scaff_17827_1-p897345 are positioned at the 16,462,971 th base of the A01 chromosome and the 7,804,227 th base of the C01 chromosome of the reference genome A01 of rape DarmorV4.1, and can be repeatedly detected in two environments and multiple models.
(5) Extracting the sequence of 100bp on the upstream and downstream of 16,462,971 th base of the rape A01 chromosome, and obtaining a primer sequence according to the PARMS primer design principle: qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAAAGAGGT AACCGTTTAAGCTTTA、qSW.A1-2Fg:GAAGGTCGGAGTCAACGGATTGAAAGAGGT AACCGTTTAAGCTTTG and qSW.A1-2R: CTTCCTACATGGTCCAGTTCGTCCC.
Extracting the sequence of 100bp on the upstream and downstream of 7,804,227 th base of rape C01 chromosome, and obtaining a primer sequence according to the PARMS primer design principle: qSW.C1-2Fa: GAAGGTGACCAAGTTCATGCTGGCTTGTGATACT TGATGCAA, qSW.C1-2Fg:GAAGGTCGGAGTCAACGGATTGGCTTGTGATACTTGAT GCAG and qSW.C1-2R: ACTACCTTTTCTGGTCTGGTTTGTC.
The protection content of the invention comprises:
the application of a system for detecting 16,462,971 th base of a chromosome A01 of a rape DarmorV4.1 reference genome in rape thousand seed weight selection breeding is disclosed, wherein the system is a reagent, a kit or an instrument.
Rape thousand seed weight selection breeding's device, its characterized in that: the device comprises a data receiving module and a data processing module, wherein the data receiving module is configured to receive the genotype of 16,462,971 th basic group of a chromosome A01 of a rape DarmorV4.1 reference genome to be detected; the data processing module is used for converting the genotype from the receiving module into a judging result of the rape to be detected.
A computer readable storage medium for thousand seed weight selection breeding of canola, characterized in that: the computer readable storage medium causes a computer to execute the steps of: detecting the genotype of 16,462,971 th basic group of the DarmorV4.1 reference genome A01 chromosome of the rape to be detected, and converting the genotype into a judging result for judging the rape to be detected.
In the application, the reagent is a primer for detecting 16,462,971 base of the A01 chromosome of the rape DarmorV4.1 reference genome.
In the application, the primer is as follows: qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAA AGAGGTAACCGTTTAAGCTTTA、qSW.A1-2Fg:GAAGGTCGGAGTCAACGGATTGAA AGAGGTAACCGTTTAAGCTTTG and qSW.A1-2R: CTTCCTACATGGTCCAGTTCGTCC C.
In the above application, the kit is a PARMS detection kit.
In the application, when the genotype of the rape to be detected is AA, the rape is judged to be plants with high thousand seed weight, and when the genotype of the rape to be detected is GG, the rape is judged to be plants with low thousand seed weight.
The protection scope of the invention also comprises:
the system for detecting 16,462,971 th base of the A01 chromosome and 7,804,227 th base of the C01 chromosome of the rape DarmorV4.1 reference genome is used for rape thousand seed weight selection breeding, and is a reagent, a kit or an instrument.
Rape thousand seed weight selection breeding's device, its characterized in that: the device comprises a data receiving module and a data processing module, wherein the data receiving module is configured to receive genotypes of 16,462,971 th basic group of a A01 chromosome and 7,804,227 th basic group of a C01 chromosome of a rape DarmorV4.1 reference genome to be tested; the data processing module is used for converting the genotype from the receiving module into a judging result of the rape to be detected.
A computer readable storage medium for thousand seed weight selection breeding of canola, characterized in that: the computer readable storage medium causes a computer to execute the steps of: detecting genotypes of 16,462,971 th basic group of the A01 chromosome and 7,804,227 th basic group of the C01 chromosome of the DarmorV4.1 reference genome of the rape to be detected, and converting the genotypes into a judging result for judging the rape to be detected.
In the application, the reagent is a primer for detecting 16,462,971 th base of the A01 chromosome and 7,804,227 th base of the C01 chromosome of the rape DarmorV4.1 reference genome.
In the application, the primer is qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAAA GAGGTAACCGTTTAAGCTTTA、qSW.A1-2Fg:GAAGGTCGGAGTCAACGGATTGAAA GAGGTAACCGTTTAAGCTTTG and qSW.A1-2R: CTTCCTACATGGTCCAGTTCGTCC C; qSW.C1-2Fa: GAAGGTGACCAAGTTCATGCTGGCTTGTGATACTTGATGCAA, qSW.C1-2Fg:GAAGGTCGGAGTCAACGGATTGGCTTGTGATACTTGATGCAG and qSW.C1-2R: ACTACCTTTTCTGGTCTGGTTTGTC.
In the above application, the kit is a PARMS detection kit.
In the application, when the genotype of 16,462,971 th base of the rape A01 chromosome to be detected is AA and the genotype of 7,804,227 th base of the C01 chromosome is GG, judging that the plants with higher thousand seed weight are plants; and when the genotype of 16,462,971 th basic group of the rape A01 chromosome to be detected is GG and the genotype of 7,804,227 th basic group of the C01 chromosome is AA, judging that the rape A01 is a plant with lower thousand seed weight.
Compared with the prior art, the invention has the following advantages:
(1) The invention obtains the locus qSW.A1-2 which is obviously related to the thousand seed weight of the rape, can be repeatedly detected in two environments, can explain 8.4% of phenotype variance on average, has an average effect of 0.24 g, and can be effectively applied to the genetic improvement of the thousand seed weight of the rape.
(2) The invention obtains the locus qSW.C1-2 obviously related to the thousand seed weight of the rape, can be repeatedly detected in two environments, can explain 6.4% of phenotype variance on average, has the average effect of 0.19 g, and can be effectively applied to genetic improvement of the thousand seed weight of the rape.
(3) The invention obtains the PARMS mark obviously associated with the thousand seed weight of the rape, and the detection method has simple operation, low cost and high flux, can select the genome haplotype region obviously associated with the thousand seed weight, and improves the selection efficiency and accuracy.
Drawings
FIG. 1 is a graph showing the frequency distribution of thousand seed weight phenotypes of 331 parts of material from a canola associated population in 10 environments.
Detailed Description
The technical scheme of the invention is conventional in the art unless specifically stated; the reagents or materials, unless otherwise specified, are commercially available. The Version number of the brassica napus genome used in the present invention is Darmor-bzh (Version 4.1).
Example 1: acquisition of SNP markers remarkably related to thousand seed weight of rape
(1) Leaves of 331 core lines of rape-associated groups were collected, total DNA was extracted by CTAB method, and genotype analysis was performed on each sample using a rape 60K SNP chip (Li et al 2020).
(2) The marker heterozygosity (heterozygous rate), loss rate (transmission rate), minimum allele frequency (minor allele frequency) was calculated for each locus using Illumina BeadStudio genotyping software (http:// www.illumina.com /). Filtering SNP markers by taking the deletion rate of less than or equal to 0.2, the heterozygosity rate of less than or equal to 0.2, the minimum allele frequency of more than 0.05 and the unique match of the SNP markers in the brassica napus genome as screening standards, and finally obtaining 24,508 high-quality SNP markers for whole genome association analysis. Group structure analysis was performed on 331 core lines using structure2.3 software (Pritchard et al, 2000), and the relationships between 331 core lines were calculated using SPAGeDi software (Hardy and Vekemans, 2002).
(3) 331 lines of the related population were planted in 2012 (W12), 2013 (Z13, W13, and N13), 2014 (Z14, W14, and N14), 2015 (W15), 2016 (W16), and 2017 (W17) at the academy of agricultural science in henna (Z), the institute of oil crops in china (Yang Luoji) and the base of red soil in the province in the west of the river (N), respectively, for a total of 10 environments. And (3) selecting 10 single plants with uniform growth vigor in each cell in the mature period, harvesting, threshing the single plants respectively, sun-drying the seeds for investigation of thousand seed weight, and calculating the average value of each plant line. By analyzing the thousand-grain weight data in each environment of the association population, the result shows that the thousand-grain weight data in all 10 environments are normally distributed and have large variation amplitude (figure 1), and the method can be used for subsequent whole genome association analysis.
(4) Full genome association analysis was performed using four models (GLM-PCA, GLM-Q, MIM-pca+k, MLM-q+k) of TASSEL 5.0 software (Bradburyet al 2007) in combination with genotype data and thousand grain weight phenotype data of the associated population. Sites qsw.a1-2 and qsw.c1-2 associated with thousand kernel weight were obtained on the a09 chromosome by integrating the significance-related SNP markers detected in different environments and models, which could be repeatedly detected in two environments and models, respectively, with peak SNP markers Bn-a01-P19633815 and Bn-scaff_17827_1-P897345 at base 16,462,971 of the a01 chromosome and base 7,804,227 of the C01 chromosome, the highest significance levels p=1.08e-08 and 8.50e-06, mean interpretable 8.4% and 6.4% phenotypic variances, mean effects of 0.24 and 0.19 grams.
Information of Table I, grain weight associated sites qSW.A1-2 and qSW.C1-2
Example 2: development of PARMS markers markedly associated with thousand kernel weight
The relevant markers obtained in example 1 were derived from SNP chips, only probe sequence information for molecular hybridization. The rape SNP chip can detect tens of thousands of sites at a time, but the operation is complicated and special equipment is needed. In addition, the detection of a large number of breeding intermediate materials by using rape SNP chips is expensive, and therefore, it is necessary to convert them into a detection method based on PCR amplification, such as PARMS (Penta-primer Amplifica tion Refractory Mutation System, five-primer amplification-blocked mutation system) markers, which is simple to operate and low in cost. The labeling system comprises a pair of fluorescent universal primers (FAM and HEX are used as report fluorescence), a pair of SNP allele specific primers and a reverse common primer, so that SNP allele detection can be rapidly and simply performed.
(1) For peak SNP markers Bn-A01-p19633815 associated with qSW.A1-2, 100bp sequences of the 16,462,971 th base upstream and downstream of the rape A01 chromosome are extracted. The primer sequences obtained according to the PARMS primer design principle are as follows: qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAAAGAGGTAACCGTTTAAGCTTTA, qS W.A1-2Fg: GAAGGTCGGAGTCAACGGATTGAAAGAGGTAACCGTTTAAGCTTTG and qSW.A1-2R: CTTCCTACATGGTCCAGTTCGTCCC.
For the peak SNP marker Bn-scaff_17827_1-p897345 associated with qSW.C1-2, 100bp sequences were extracted upstream and downstream of the 7,804,227 th base of the rape C01 chromosome. The primer sequences obtained according to the PARMS primer design principle are as follows: qSW.C1-2Fa: GAAGGTGACCAAGTTCATGCTGGCTTGTGATACTTGATGCAA, qSW.C1-2Fg:GAAGGTCGGAG TCAACGGATTGGCTTGTGATACTTGATGCAG and qSW.C1-2R: ACTACCTTTTCTGGTCTGGTTTGTC.
(2) And (3) taking genome DNA of rape related population as a template, carrying out fluorescent quantitative PCR amplification by using the primer, scanning FAM, HEX and ROX signals by using TecanF200, outputting the results, and finally converting the results into genotypes.
Example 3: application of PARMS mark in rape thousand seed weight screening
Of 331 relevant populations (Li et al 2020), 165 were detected with the PARMS marker qsw.a1-2 provided in example 2 for materials with genotype AA and 140 for genotype GG (table two). The thousand grain weight difference of the two genotypes reached a significant level in seven environments, with the thousand grain weight difference of the two genotypes AA and GG ranging from 0.16 to 0.26, on average 0.21 grams.
Comparison of thousand-grain weights of two genotypes of Table II and PARMS marker qSW.A1-2 in ten environments of related populations
Genotype of the type | N13 | N14 | W12 | W13 | W14 | W15 | W16 | W17 | Z13 | Z14 |
AA(n=165) | 4.80 | 4.17 | 4.19 | 3.85 | 3.99 | 4.21 | 3.66 | 3.78 | 3.75 | 4.18 |
GG(n=140) | 4.69 | 4.01 | 4.06 | 3.64 | 3.75 | 3.97 | 3.43 | 3.67 | 3.59 | 3.93 |
AA-GG | 0.11 | 0.16* | 0.13 | 0.20* | 0.24* | 0.25* | 0.23* | 0.10 | 0.17* | 0.26* |
* Representing a significance level p=0.05.
Of 331 relevant populations, 50 parts of the PARMS labeled qSW.C1-2 material with genotype AA and 277 parts of the genotype GG were detected as provided in example 2 (Table three). The thousand grain weight difference between the two genotypes reached a significant level in eight environments, with the thousand grain weight difference between the two genotypes GG and AA ranging from 0.17 to 0.40, on average 0.29 grams.
Comparison of thousand grain weights of two genotypes of table three and PARMS marked qSW.C1-2 in ten environments of related populations
Genotype of the type | N13 | N14 | W12 | W13 | W14 | W15 | W16 | W17 | Z13 | Z14 |
AA(n=50) | 4.64 | 3.76 | 3.96 | 3.47 | 3.64 | 3.72 | 3.32 | 3.58 | 3.52 | 3.99 |
GG(n=277) | 4.76 | 4.17 | 4.22 | 3.80 | 3.94 | 4.07 | 3.60 | 3.75 | 3.73 | 4.09 |
GG-AA | 0.12 | 0.40*** | 0.26* | 0.34** | 0.30** | 0.35** | 0.28** | 0.17* | 0.21* | 0.10 |
* Sum represents significance levels p= 0.05,0.01 and 0.001, respectively.
Of 331 relevant populations, the primers of example 2 providing PARMS markers qSW.A1-2 and qSW.C1-2 were used in combination, 149 of the materials of genotype AA in qSW.A1-2 and genotype GG in qSW.C1-2, 23 of the materials of genotype GG in qSW.A1-2 and genotype AA in qSW.C1-2, and the thousand-grain weight differences of both genotypes reached significance levels in all 10 environments. Wherein the difference in 5 environments reaches an extremely significant level, ranging from 0.44 to 0.51, averaging 0.47 grams.
Comparison of thousand-grain weights of two genotypes of Table four, PARMS markers qSW.A1-2 and qSW.C1-2 in ten environments of the related population
* Sum represents significance levels p= 0.05,0.01 and 0.001, respectively.
The above results are sufficient to demonstrate that the PARMS markers qSW.A1-2 and qSW.C1-2 prepared by us are highly correlated with thousand seed weight of canola, and have good selection effect both alone and in combination.
Claims (2)
1. Application of primer for detecting 16,462,971 th base of chromosome A01 of rape DarmorV4.1 reference genome in rape thousand seed weight selection breeding, wherein the primer is as follows:qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAAAGAGGTAACCGTTTAAGCTTTA、qSW.A1-2Fg: GAAGGTCGGAGTCAACGGATTGAAAGAGGTAACCGTTTAAGCTTTG and is provided withqSW.A1-2R:CTTCCTACATGGTCCAGTTCGTCCC。
2. Application of primer for detecting 16,462,971 th base of rape DarmorV4.1 reference genome A01 chromosome and 7,804,227 th base of rape C01 chromosome in thousand seed weight selective breeding of rape, wherein the primer is as follows:qSW.A1-2Fa:GAAGGTGACCAAGTTCATGCTGAAAGAGGTAACCGTTTAAGCTTTA、qSW.A1-2Fg: GAAGGTCGGAGTCAACGGATTGAAAGAGGTAACCGTTTAAGCTTTG and is provided withqSW.A1-2R:CTTCCTACATGGTCCAGTTCGTCCC;qSW.C1-2Fa:GAAGGTGACCAAGTTCATGCTGGCTTGTGATACTTGATGCAA、qSW.C1-2Fg: GAAGGTCGGAGTCAACGGATTGGCTTGTGATACTTGATGCAG and is provided withqSW.C1-2R:ACTACCTTTTCTGGTCTGGTTTGTC。
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