118 results about "Germ plasm" patented technology

The invention provides a vitrification cryopreservation method of dendrobium wardianum warner protocorm, relating to the technical field of cryopreservation. The method comprises the following steps of: after preprocessing the protocorm with high permeability at low temperature, transferring the protocorm to a loading liquid; performing dewatering treatment, transferring the protocorm to a freezing tube which is filled with vitrification solution; and rapidly filling with liquid nitrogen for cryopreservation. The method in the invention provides technical guarantee for the preservation of theendangered dendrobium wardianum warner germ plasm resource. The invention provides an effective path for the preservation of the dendrobium plant even the arethusa resource and the cultivation of newspecies by using plant diversity.

The invention discloses an amplimer of a large yellow croaker mitochondrion complete genome sequence and an application thereof. The 15 pairs of amplimer are applied, a gene order is respectively shown as SEQ ID No: 1-30, the amplimer is further used for obtaining a Tai Qu family large yellow croaker mitochondrion complete genome sequence and a Min-Yue East family large yellow croaker mitochondrion complete genome sequence which are respectively shown as SEQ ID No: 31 and SEQ ID No: 32, and an amplimer of large yellow croakers in a high variation region is obtained. The amplimer and the application have the advantages that the Tai Qu family large yellow croaker and Min-Yue East family large yellow croaker mitochondrion complete genome sequences can be quickly and efficiently obtained respectively through the 15 pairs of amplimers; and the amplimer of the large yellow croakers in the high variation region provides support for the research of species identification, geographical population identification, germ plasm resources and genetic diversity of the large yellow croakers, and further provide the basis for developing an identification technology of Tai Qu family large yellow croakers and Min-Yue East family large yellow croakers.

The invention provides a method for selecting and breeding a novel silkworm breed capable of producing a great number of all natural pure sericin proteins, which introduces a special germ plasm resource from Japan, adopts genetic thremmatology to be combined with bioscience, and utilizes a distant hybridization method to breed a silkworm breed with sturdy, disease prevention, high temperature resistance, short breeding period and excellent economic character. The method leads excellent genes of the silkworm breed in the germ plasm resource to breed into an all natural pure sericin silkworm breed with high purity, and provides a novel approach for non spun silk industries to produce all natural pure siricin materials.

The invention discloses a gene ABCG15 for controlling rice fertility, an encoded protein and the application thereof. The invention also discloses a single recessive nuclear sterile gene, which is generated by mutation caused by deletion of the gene 12bp for controlling the rice fertility. The invention also discloses a method for obtaining a rice sterile line by controlling the expression of the rice fertility gene according to an RNAi technology and the method comprises the following steps of: amplifying a DNA fragment for generating an anti-sense RNA, constructing an expression vector, and transforming the DNA fragment into the normal fertile rice, so as to obtain a new rice nuclear sterile material. The newly found gene for controlling the rice fertility provides a new way for culturing the rice nuclear sterile line. The method for generating the rice nuclear sterile line is convenient and quick. The rice nuclear sterile material can be used for replacing the manual castration during the rice hybridization, labor is saved; the rice nuclear sterile material also can be used for recurrent selective breeding and plays an important role in widening the rice germ plasm basis.

The invention provides a method for screening specific molecular markers of rice fertility restorer genes, which is characterized by applying rice germ plasm resources carrying and not carrying fertility restorer genes and screening the molecular markers, the sterile lines and (or) the restorer lines of which are in specific banding patterns, from the molecular markers closely linked with the rice fertility restorer genes Rf3 and Rf4. With the markers adopted to carry out auxiliary selection on the molecular markers of rice fertility restorer genes, the breeding efficiency of the sterile lines and the restorer lines of indica type rice can be improved.

The invention discloses a method for preparing a cabbage type rape BnPABP3 promoter (PBnPABP3) and the application thereof. The method comprises the following steps of: cloning PBnPABP3 sequence by utilizing the genome walking method, extracting genome DNA by utilizing the SDS cracking method, carrying out enzyme digestion on DNA by respectively using endonuclease DraI, EcoRV, PvuII and StuI in different systems, carrying out the first round of PCR amplification by adopting the product as a template after joint segments are connected with the product, and carrying out the second round of PCR amplification by adopting the 50 times diluent of PCR products obtained in the first round as a template so as to obtain the PBnPABP3. The PBnPABP3 is applied to anther and pollen grains of plant. The promoter has the function of driving exogenous gene expression, the expression parts of the promoter are in the anther and pollen grains of plant, and the promoter has the application potentiality in the aspects of improving the safety of rape edible oil as well as the quality of crops, artificially creating sterile line and restorer line, enriching germ plasm resources, and the like.

The invention belongs to the field of molecular biology DNA labeling technology and application, and in particular relates to Apostichopus japonicas express sequence tag EST micro-satellite label screening development and application. The invention provides Apostichopus japonicas AjE101 micro-satellite specific DNA primers, a polymerase chain reaction (PCR) reaction system by utilizing the primers, and a detection method for an Apostichopus japonicas AjE101 micro-satellite DNA label. The detection method comprises the following steps of: extracting genome of Litopenaeus vannamei Boone; designing the specific primers at two ends of an Apostichopus japonicas AjE101 micro-satellite DNA core sequence; and performing PCR amplification on genome DNA of different groups of the Litopenaeus vannamei Boone or individuals in the group by using the primers, analyzing products, and determining the genome of each individual so as to obtain an Apostichopus japonicas polymorphism genetic variation map. The invention is mainly applied to Apostichopus japonicas germ plasm resource and genetic diversity analysis, cular population genetics, construction of genetic maps and research of functional genes.

The present invention relates to a male and female mating propagation method of tilapia, in specific to a mating propagation of tilapia which can adopt the pattern of male mating female; the method belongs to the technical field of aquatic product breeding. The method is characterized in that a net cage is equipped in an outdoor pond or indoor concrete pond; adult male tilapias are selected and people cut the upper jaw of the tilapias and put the tilapias into the net cage after being sterilized; and then adult female tilapias are selected to put in the net cage for mating culture and people can see the zygotes in the mouths of female tilapias after 7 to 10 days. With the present invention, a tilapia family line can be established for the family breeding of tilapias. In addition, people can clearly know the relation between the offspring and parent to control the inbreeding and avoid the germ plasm degeneration of offspring.

The invention belongs to the field of molecular biology DNA (Deoxyribonucleic Acid) marker technology and application, and particularly relates to specific primers and a screening method for an EST-SSR (Express Sequence Tag-Simple Sequence Repeat) marker of a torreya grandis transcriptome sequence. The screening method comprises the following steps: firstly, assembling fine torreya grandis seed kernel and circular torreya grandis seed kernel transcriptome data by adopting Trinity software to obtain a transcript sequence; secondly, carrying out SSR site research on Unigene with 1kb or above obtained by screening by using an MISA (MIcroSAtellite identification tool) program, and carrying out screening and separating on 2 to 6 base repeat units and repeat times according to microsatellite fragments with repeat times of 9, 8, 5, 5 and 5 in sequence, thereby obtaining an ESTs sequence with microsatellite repeat; thirdly, designing the primers by using a Primer 3 program; finally, comprehensively evaluating repeatability, stability and polymorphism of the EST-SSR marker to obtain the EST-SSR marker. The specific primers disclosed by the invention can be used for conveniently and quickly analyzing germ plasm resources of different types and genetic diversity of interspecific and intraspecific torreya grandis.

The invention provides a method for screening microsatellite markers of Macrobrachium nipponensis by a magnetic beads enrichment method, including the following steps: the extraction of the genomic DNA of the Macrobrachium nipponensis; the hybridization of a probe and a target segment; the enrichment of magnetic beads; positive sequencing clone and the amplification of the genomic DNA according to primers which are related to the flanking sequences of the microsatellite. As the invention combines the magnetic beads enrichment and PRC amplification of bacterial liquid to carry out second-time screening, no isotope is needed. The method has the advantages of safety and high efficiency and low cost, short cycle, high reliability and the like. At the same time, in the enrichment process, the magnetic beads are repeatedly washed for a plurality of times, which can clean and remove microsatellite sequences which are not firmly adhered because of less repetition times. Therefore, the obtained microsatellite sequences are longer and are repeated for more times. The microsatellite sequences which are more frequently repeated are considered to have rich diversity at interspecies and intraspecies and can be widely applied to the diversity identification of germ plasm, the building of genetic maps, and QTL. Therefore, the method is one which screens the microsatellite markers of Macrobrachium nipponensis and can be easily popularized.

The present invention belongs to the field of marine biological technology, and especially the process of granular freezing genuine porgy embryo, preservation in liquid nitrogen, de-freezing and eluting to obtain live embryo. The genuine porgy embryo in cardiopalmus stage is added with antifreeze agent and fast granular vitrification frozen and then treated through preservation in liquid nitrogen, de-freezing and eluting, so as to obtain live embryo. The present invention is significant in germ plasm preservation, genetic diversity, breeding and cultivation of genuine porgy.

The invention relates to a mitochondrial genome complete sequence primer of octopus dollfusi, which can achieve amplification of mitochondrial genome of the primer in one time and can rapidly acquirea genome complete sequence of the primer via sequencing and assembling and which has the characteristics of being simple, convenient and efficient, as well as designing, phylogenetic analysis and amplification methods; with the application of the primer provided by the invention, the mitochondrial genome of the primer can be amplified in one time and the genome complete sequence of the primer canbe rapidly acquired via sequencing and assembling, and the primer has the characteristics of being convenient and efficient; and the provided phylogenetic analysis of the mitochondrial genome completesequence primer of octopus dollfusi can offer important molecular means and data accumulation for population genetics, germ-plasm conservation and sustainable development and utilization of the octopus dollfusi as well as for phylogenic studies on octopus animals and even on entire cephalopoda.

This invention discloses a method for segregation purifying insect pathogenic fungi thalline from suscepted insect bloodlympha. It is prepared through steps as follows: deal with blood cell of suscepted insects with a series of enzymes to destroys and removes their germ plasms; finally seperate and purify to get the products. Adopt the achieved pathogenic fungi thalline to extract DNA and mRNA, which has no insect germ plasm pollution according to PCR and RT-PCR verification. The DNA and mRNA extracted can be used to construct gene library, it also lays solid foundation for further uncovering entomogenous fungi invading mechanism.

The present invention discloses tetraploid preparing process suitable for chlamys Farreri. Natural diploid chlamys Farreri with propagation capacity is fertilized artificially to obtain fertilized egg, the fertilized egg is applied with chemical inducing agent to double the chromosome to obtain tetraploid, and the tetraploid is screened in the constant current process. The present invention utilizes special chromosome operating technology to obtain specific germ plasm resource of chlamys Farreri and has rich material source, and stable tetraploid inducing rate over 30 %.

The invention discloses a method for preparing a promoter (PBnPABP2) of Brassica napus BnPABP2 and the application thereof. The operation of cloning a PBnPABP2 sequence by using a genome walking method comprises the following steps: extracting genome DNA by using a SDS cracking process; in different systems, carrying out restriction endonuclease reaction on the extracted DNA respectively by using endonucleases DraI, EcoRV, PvuII and StuI; after the obtained DNA is connected with a linker fragment, carrying out first-round PCR amplification by taking the linker fragment as a template; and carrying out second-round PCR amplification by taking a50-time diluent of the obtained first-round PCR product as a template, thereby obtaining the PBnPABP2. The PBnPABP2 is applied in the roots, stems, leaves, flower buds, anthers and peels of plants. The promoter has the function of driving the expression of exogenous genes, and the expression sites thereof are respectively in the roots, stems, leaves, flower buds, anthers and peels of plants; and the promoter has application potentials in the aspect of safety of edible oil of Brassica napus and the aspects of improving the disease resistance, stress resistance and lodging resistance of crops, improving the quality of crops, artificially creating a male sterile line and a restoring line, enriching germ plasm resources, and the like through transgenosis.

The invention discloses a method and application method for obtaining a novel germ plasm of brassica A genome vegetable. In the method, free microspore culture is carried out on crossbreeds among vegetables of Chinese cabbage subspecies*pakchoi cabbage subspecies or variety in pakchoi cabbage subspecies*variety of the brassica A genome to obtain a regeneration plant and further to create the novel germ plasm which is used for breeding. The method mainly comprises the following steps of: hybridizing the vegetables of Chinese cabbage subspecies*pakchoi cabbage subspecies or variety in pakchoi cabbage subspecies*variety; inducing free microspore culture embryoids; germinating the embryoids to obtain the regeneration plant; carrying out ploidy identification on the regeneration plant obtainedby microspore culture; reserving seeds of double haploids and polyploids; planting an offspring of the regeneration plant to carry out morphological identification and nutritive index identification;and preparing, hybridizing and combining. The method has the advantages of short cycle and high efficiency, provides a material for efficiently breeding Chinese cabbage vegetables and has broad application prospect.

The invention relates to a method for identifying the germ plasm of Y-superior serial hybrid rice, comprising the following steps: (1) a primer which can be used for identifying the germ plasm of Y-superior serial hybrid rice is selected; (2) the PCR augmentation on rice samples to be identified is carried out by the obtained primer; (3) the electrophoresis detection for a DNA special marker is carried out; (4) the molecule id card number which is corresponding to the rice samples to be identified is manufactured according to the obtained DNA special marker scattergram, when the first digit of the number is '1', only one digit '1' can appear from the second digit to the fifth digit, and the rice samples to be indentified is Y-superior serial hybrid rice, otherwise the identifying conclusion is contrary. By making use of the method, the varieties and the parent-strain germ plasm of the Y-superior serial hybrid rice can be indentified. The invention has the advantages of short detecting time, large quantity, high efficiency and accurate seed purity identification, thereby the risk of the large-area production of the hybrid rice can be greatly reduced.