756 results about "Snp markers" patented technology

The invention provides a major SNP (single nucleotide polymorphism) marker influencing the growth traits of pigs. The SNP marker is located at a nucleotide sequence of an HMGA1 gene of a pig chromosome 7, a locus of the SNP marker is the nucleotide mutation of C857-G857 with an SEQ ID NO:1 sequence labeling position of 857, corresponding to a 34983991st nucleotide locus C> on chromosome 7 in a reference sequence in an international pig genome version 10.2, G mutation, or one of seven other loci completely linked with the locus. The invention also provides the application of the SNP marker in the genetic improvement of growth traits of breeding pigs, and provides the application of an SNP molecular marker with a linkage disequilibrium degree (r2) with the SNP marker of greater than 0.8 in the genetic improvement of growth traits of breeding pigs. The growth traits include one or more of the length and height of a living body of a pig, carcass length, carcass weight, daily gain and head weight. According to the invention, the breeding process of breeding pigs can be accelerated, the productivity of breeding pigs can be effectively improved, and remarkable economic benefits can be obtained.

The invention discloses a rice blast resistance gene Pi9 gene specificity molecular marker Pi9SNP as well as preparation and application thereof. The molecular marker Pi9SNP is prepared by amplifying from total DNA (Deoxyribonucleic Acid) of a rice blast resistant variety with rice blast resistance gene Pi9 by using a primer pair F1 and R1 so as to obtain a nucleotide segment I, and carrying out digestion on the nucleotide segment I by using restriction enzyme Hind III, so as to obtain a nucleotide segment II which is in specificity banding pattern with the obtained rice blast resistance gene Pi9. The molecular marker is the first one which is developed for marking Pi9 gene specificity SNP (Signal Nucleotide Polymorphism) for an internal sequence of the Pig gene, and has the following advantages that the specificity is high, the cost is low and the flux is high in practical application, and the molecular marker is widely applied to colonies of different genetic backgrounds. By utilizing the molecular marker, the efficiency in auxiliary molecular marker selective breeding, gene pyramiding breeding and transgenosis breeding is improved.

The present invention relates to the selection of a set of SNP markers for use in genome wide association studies based on linkage disequilibrium mapping. In particular, the invention relates to the fields of pharmacogenomics, diagnostics, patient therapy and the use of genetic haplotype information to predict an individual's longevity, their protection against age-related diseases and/or their response to a particular drug or drugs.

The invention discloses an upland cotton SNP marker and application thereof, and belongs to the field of upland cotton SNP marker development. The upland cotton SNP marker is obtained by developing a single-copy SNP marker of an upland cotton genome via chip hybridization and homologous sequence comparison, and picking out SNP markers in a linkage disequilibrium recession distance via linkage disequilibrium analysis. The SNP marker provided by the invention can be applied to analysis of genetic diversity and group structure, or to germplasm identification of upland cotton, is single-copy, and has no remarkable linkage disequilibrium among markers, so that the efficiency of detection, adopting the SNP marker, during analysis of genetic diversity, group structure or fingerprint identification can be greatly improved, and the work efficiency is higher.

The invention discloses a gene-specific molecular marker Pi2SNP of a rice blast-resistant gene Pi2 as well as a preparation method and application thereof. The molecular marker Pi2SNP is a nucleotide fragment II in a specific banding pattern with the rice blast-resistant gene Pi2 obtained by amplifying F1 and R1 from the total DNA (Deoxyribose Nucleic Acid) of the rice blast-resistant variety carrying rice blast-resistant gene Pi2 by use of a primer to obtain a nucleotide fragment I and then performing enzyme digestion of the nucleotide fragment I by use of restriction endonuclease Pst I or Hinf I. The molecular marker is the first Pi2 gene-specific SNP marker developed for the sequence in the Pi2 gene, and has the advantages of high specificity and low cost and high flux in practical application, and can be widely applied to the colonies with different inheritance backgrounds. By adopting the molecular marker, the utilization efficiency of the gene in molecular marker-assisted selective breeding, gene pyramiding breeding and transgenic breeding can be improved.

The invention relates to the field of molecular biology detection, in particular to SNP (Single Nucleotide Polymorphism) related to chick carcass trait and application thereof. The invention provides 10 SNP markers of a chick SREBF2 gene and a method for detecting the carcass trait of a chick colony by applying the SNP markers. The invention further provides a primer for detecting the SNP markersand a kit comprising the same. The SNP markers provided by the invention can be applied to molecular marker assistant breeding of chicken, can assist in screening quickly and accurately, and have theadvantages of early screening, saving in time, low cost and high accuracy.

The invention belongs to the technical field of molecular breeding of cotton and discloses an SNP molecular marker associated with fiber strength of upland cotton as well as detection and application thereof. The SNP molecular marker is obtained by taking stable RIL group of cotton as the material through a genome resequencing method. When the SNP markers are used for carrying out molecular marker-assisted breeding selection, the breeding period can be greatly shortened; the breeding efficiency of the cotton can be improved; the cotton fiber strength can be improved.

The invention provides an SNP marker related to the sugar tolerance of grass carps and application of the SNP marker. The SNP marker comprises two SNP loci, namely H3 and H4, wherein H3 is located at position 1817 from the 5' end of the nucleotide sequence shown as SEQ ID NO:1 in the specification, and base at the position 1817 is T or C; H4 is located at position 1818 from the 5' end of the nucleotide sequence shown as SEQ ID NO:1 in the specification, and base at the position 1818 is G or T. The SNP marker provided by the invention is closely related to the sugar tolerance of the grass carps, and can be effectively used for identification or selective breeding of high-sugar-tolerance grass carp species.

The invention provides a molecular marker related to the color property of tomato fruit and application thereof. The molecular marker includes 2 SNP markers and 2 InDel markers. SNP-p is located at site 8616bp of the upstream of initiator codon of a tomato SlMYB 12 gene, wherein bases which are C represent red tomatoes and bases which are A represent pink tomatoes. SNP-s is located at site 307bp of the downstream of the initiator codon of the tomato SlMYB 12 gene, wherein bases which are T represent pink tomatoes and bases which are C represent red tomatoes. InDel-p is a sequence located at about site 4kp of the upstream of the initiator codon of the tomato SlMYB 12 gene and having a size of 603 bp, wherein pink tomatoes are deleted in the sequence. InDel-i is located at site 248bp of the downstream of the initiator codon of the tomato SlMYB 12 gene, wherein A is located behind the site and is a pink tomato. The molecular marker can be applied to molecular marker-assisted breeding of tomatoes and can substantially accelerate the breeding process of tomatoes.

The invention provides an SNP (Single Nucleotide Polymorphism) marker related to the bitter character of cucumber and application of the SNP marker. The SNP marker is located at the NO.1178bp of the gene sequence for coding the Csa6G088690 protein of cucumber; cucumber with basic groups G at the NO.1178bp is bitter; and cucumber with basic groups A at the NO.1178bp is not bitter. According to the invention, a genome wide association study (GWAS) method is adopted to screen out the SNP marker related to the bitter taste character of cucumber, a derived cleaved amplified polymorphic sequences (dCAPS) method is adopted to detect the gene types of cucumber to be detected, and bitter or non-bitter cucumber variety breeding is carried out according to the gene types, so as to speed up the breeding process of non-bitter cucumber. The SNP marker is more accurate and reliable in result than the traditional method of subjectively judging whether cucumber is bitter or not, is simpler and more convenient than HPLC (High Performance Liquid Chromatography) for identifying bitter substances, and can be used for large-scale screening of breeding materials. Besides, the invention discovers the committed step for the Csa6G088690 protein of cucumber to control the synthesis pathway of bitter of cucumber for the first time.

Through amplification of a part of fragments of an NPY gene, and through an SNaPshot SNP typing method, provided is SNP markers related to the grass carp growth speed, wherein S1 is located at a 639th locus from an initiation codon (ATG, with an ATG first nucleotide as the first) in an intron 1 sequence of the NPY gene, and a base at the position is T or A; S2 is located at an 892nd locus from the initiation codon in the intron 1 sequence of the NPY gene, and a base at the position is C or A. The two SNP loci can be used for identification or breeding of grass carp with faster growth speed, and lay the foundation for screening and establishment of grass carp fast-growth new varieties.

The invention belongs to a method for extensively screening scallop SNP in the technical field of the scallop DNA molecular genetic marker, which comprises the following steps that: solution D and phenol-chloroform are firstly used for extracting a plurality of Chlamys farreri RNA, and a ultraviolet specrophotometer is used for measuring the concentration of the mixture of solution D and the phenol-chloroform which are uniformly mixed; a scallop full-length cDNA sample is re-established and comprises the synthesis of a cDNA first chain and the synthesis and augmentation of a cDNA second chain; then homogenization of full-length cDNA is performed, and ultrasonic breaking is performed; then sequence measuring joints are connected, and terminal repair, joint connection and sample augmentation are included; finally a biological software is used for analyze the data to obtain an SNP marker; then an SNP marker to be screened is selected to design a primer; and DNA of individual scallop is extracted to be equivalently mixed to be used as a template, conventional colony sequence measuring is undertaken after the PCR augmentation, and the position point with the occurring frequency of single base difference being 10 percent or more is defined as an SNP marker. The method has safe and reliable principle, simple and controllable flow procedures, reliable running of large-scale screening, excellent effect and strong practicability.

The invention relates to Chinese population linkage analysis single nucleotide polymorphism (SNP) marker sets and a use method and application thereof. On the basis of hundreds of millions of Chinese Han population data results in the mass data of the International HapMap Project, medium-density and high-density SNP marker sets for linkage analysis are constructed and optimized, according to the statistical comparisons of multiple parameters such as the linkage disequilibrium, the polymorphism level, the typing success rate, the distribution position and density of genomes and the functional characteristic, and the multi-level selections and experimental verifications. The two marker sets separately contain 3000 and 6001 loci, wherein the 6001 loci contain the 3000 loci. The SNP sets aim at the Han genetic background in design, have high polymorphism in Chinese and can realize the aim of efficiently marking the Chinese family sample genomes. The selection of polymorphic loci is based on the neutral evolution principle, and all the loci are in a non-gene function region, thus the influence of evolution on the gene function can be avoided. Meanwhile, the characteristics that the marking loci have high typing detectability and can uniformly cover the whole genomes can ensure that the whole genomes can be screened completely and new pathogenic genes can be located and found. The two sets of SNP markers are used to customize probes or chips and perform whole-genome genotyping to family samples; and the typing data are used for linkage analysis, and the haplotyping and fine locating of the linkage candidate region are also adopted, thus the use method has more accurate locating result than the traditional method while the cost is lower and the speed is higher. The distribution and coverage of the 6001 SNP marker set in human chromosomes are shown in the appended drawings.

The invention provides an SNP (single nucleotide polymorphism) marker (comprising SNP1 and SNP4) for evaluating growth performance of ctenopharyngodonidella and a primer pair for amplifying a gene segment where an SNP locus is positioned by virtue of methods of molecular genetics and molecular biology. SNP1 is positioned at the 940th locus in a promoter of a complete sequence of a MyoD (myogenic determining factor) gene of the ctenopharyngodonidella, and a base T is inserted or deficient at the position; SNP4 is positioned in a 107th locus in a first intron of the complete sequence of the MyoD gene of the ctenopharyngodonidella, and a base at the position is A or T. The growth performance of the ctenopharyngodonidella is determined by detecting haplotypes of the two SNP loci. The adopted haplotypes are mutated according to bases generated in the MyoD gene, so that genetic exchange and further phenotype verification are avoided. By virtue of the haplotypes of the SNP marker, rapidly growing ctenopharyngodonidella can be simply and rapidly identified, and rapidly growing ctenopharyngodonidella of a new line can also be guided to be bred.

The invention relates to an SNP marker related with low dissolved oxygen survivability of litopenaeus vannamei, screening and applications thereof, and belongs to the technical field of molecular marker assisted selection of aquatic animals. An SNP molecular marker is cloned from SOD gene. The SNP marker is that the R in the 118-th base from the 5' terminal of the nucleotide sequence represented by SEQ ID No.1 is C or T. The SNP marker is prominently related with the character of tolerating low dissolved oxygen of litopenaeus vannamei, and thus can be applied to the molecular marker assisted selection so as to screen litopenaeus vannamei with strong performance of tolerating low dissolved oxygen. The provided SNP marker can be used to carry out early stage screening according to the actual needs, thus the efficiency and accuracy of breeding are effectively improved, the genetic level of litopenaeus vannamei is improved, species with strong stress resistance can be accurately and efficiently bred, the SNP marker is practical and the application range is wide.

The invention relates to an SNP (Single Nucleotide Polymorphism) marker for rapidly identifying panax stipuleanatus and counterfeit species thereof. The nucleotide sequence of the SNP marker is shown as SEQ ID No.1; an 88th site from a 5 end of the sequence is A and/or a 117th site is C. The invention further relates to a kit for rapidly identifying the panax stipuleanatus and the counterfeit species thereof, and the kit comprises a primer which is used for amplifying to obtain the sequence shown as SEQ ID No.1. The invention further relates to a method for rapidly identifying the panax stipuleanatus and the counterfeit species thereof; the method comprises the following steps: taking a genome DNA (Deoxyribonucleic Acid) of a sample to be identified as a template and amplifying the sequence shown as SEQ ID No.1; detecting an 88th site basic group and a 117th site basic group from the 5 end in an obtained amplified fragment, so as to judge that the sample to be identified is the panax stipuleanatus or the counterfeit species thereof. By adopting the method provided by the invention, the panax stipuleanatus and the counterfeit species with similar morphological characteristics can be accurately distinguished; the method has wide applicability and can be used for detecting any sample of the panax stipuleanatus capable of being used for extracting the DNAs, and rapid and accurate identification of the panax stipuleanatus can be realized.

The invention relates to the field of molecular biology and genome breeding, and particularly discloses a corn whole genome SNP chip and application thereof. SNP loci covering a genetic expression area and SNP loci which are uniformly distributed in the whole genome are collected, after sifting, a high-throughput Infinium SNP chip of Illumina is prepared, and the chip comprises 500 probes of SNP markers shown in a detection list 1. By means of the selected SNP loci based on a large-scale sequencing result, specific signals which have reasonable frequency distribution, a low miss rate and low false positives are obtained, wherein 2/3 SNP loci are distributed in all the corn warm zone and tropical zone materials, and can be effectively used for selecting and utilizing the tropical zone materials; 426 SNP loci are functional markers, and are obviously relevant to kernel substance accumulation gene expression; an Infinium platform of Illumina has the advantages of being high in SNP typingdetection rate, high in repetitive rate, simple in detection and high in accuracy. The corn whole genome SNP chip can be used for corn germplasm resource molecular marker fingerprint analysis, corn linkage map construction, QTL locating, corn breeding material background selection and the like.

The invention belongs to the technical field of genetic engineering, and provides a method for acquiring chicken whole genome high-density SNP marker sites. The method comprises the following steps: (1) predicting distribution of restriction fragments acquired from double-restriction chicken genomes of EcoRI and MseI; (2) designing a universal joint, a barcode joint and a PCR amplification primer according to the distribution characteristics of the restriction fragments of EcoRI and MseI; (3) constructing a simplified genome sequencing library; (4) sequencing by virtue of the library constructed in the step (3) through a computer; and (5) according to a sequencing result, acquiring SNP marker sites. The method disclosed by the invention provides a universal strategy for the construction of a whole genome high-density SNP map by virtue of double-restriction GBS for different varieties of chickens, so that the cost on acquiring every SNP marker site is reduced by an order of magnitude compared with a conventional chip technology; and the method is stable in technology and high in repeatability.

Genes, SNP markers and haplotypes of susceptibility or predisposition to T2D and subdiagnosis of T2D and related medical conditions are disclosed. Methods for diagnosis, prediction of clinical course and efficacy of treatments for T2D, obesity and related phenotypes using polymorphisms in the risk genes are also disclosed. The genes, gene products and agents of the invention are also useful for monitoring the effectiveness of prevention and treatment of T2D and related traits. Kits are also provided for the diagnosis, selecting treatment and assessing prognosis of T2D. Novel methods for prevention and treatment of metabolic diseases such as T2D based on the disclosed T2D genes, polypeptides and related pathways are also disclosed.

The invention relates to an SNP (simple nucleotide polymorphism) modular marker for rice low cadmium accumulation gene OsHMA3; a detection site of the marker is at base 7431781 of chromosome 7 of rice. The invention also provides a primer set and method for detecting the SNP marker; the primer set has a sequence shown as in SEQ ID NO. 2-4. The SNP molecular marker and the primer set and method have the advantages that the SNP molecular marker is suitable for predicting the cadmium content of rice kernels before rice not bearing fruits, and suitable for accurate screening, such that breeding of low-cadmium-content varieties of rice is significantly promoted; the detection method is accurate and reliable and is simple to perform; the detection of SNP sites for rice OsHMA3 gene provides scientific basis for the breeding or improvement of low-cadmium-content kernel varieties of rice.