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50results about How to "High induction success rate" patented technology

Method for inducing protocorms by utilizing dendrobe tissues

The invention provides a method for inducing protocorms by utilizing dendrobe tissues. The method comprises the following steps: (1) carrying out routine asepsis on the obtained dendrobe tissues, wherein the dendrobe tissues are from the stem tip, root tip or tender stem section of dendrobe; and (2) carrying out induction culture on the dendrobe tissues subjected to asepsis in an induction culture medium firstly at the temperature of 23-25 DEG C and under a dark condition for one week and then at the temperature of 23-25 DEG C and under an illumination condition for 20-30 days with the illumination period of 12h / day, thus obtaining the protocorms. The method provided by the invention has the following main beneficial effects: (1) the method is simple in operation, low in production cost and less in environmental pollution; (2) the induction success rate is high, wherein the induction rate based on stem section culture is generally about 50%, the induction rate based on root tip culture can reach 60%-70%, and the best induction success rate based on the stem tip culture can reach about 75%; (3) the culture cycle is short, a large number of protocorms can be obtained within less time, and the induced protocorms can be directly subjected to aseptic culture so as to obtain a large number of seedlings; and (4) tissue culture is directly utilized, thus the characters of parents are well maintained.
Owner:HANGZHOU NORMAL UNIVERSITY

Method for cultivating pearl by inducing triploid hyriopsis cumingii

The invention discloses a method for cultivating a pearl by inducing triploid hyriopsis cumingii. The method comprises the following steps of: cultivating the triploid hyriopsis cumingii by induction, namely selecting diploid hyriopsis cumingii with age of 3 to 6, shell length of over 15cm and shell thickness of over 5cm in normal growth as parent clams; isolating the male clams from the female clams of the selected parent clams for cultivation respectively; tracking and observing the development condition of the eggs of the female clams; transferring the female clams into a pond for cultivating the male clams to perform natural insemination on the female clams after the eggs are maturely developed; observing the development condition of the fertilized eggs; putting the female clams into 300 to 450 mu mol/L aqueous solution of 6-dimethyl aminopurine after over 80 percent of the fertilized eggs have first polar bodies; and performing induction processing for 10 to 30 minutes to obtain induced female clams; cultivating the female clams, and hatching and raising the seedlings to obtain the triploid juvenile clams; and performing cultivation to obtain the triploid hyriopsis cumingii. In the method, the normal diploid hyriopsis cumingii is used as the parents, and the natural insemination is adopted, so that the induction success rate is improved to over 70 percent.
Owner:ZHEJIANG SHANXIAHU PEARL GROUP CO LTD +1

Method for culturing autotetraploid paris polyphylla plant

The invention discloses a method for culturing an autotetraploid paris polyphylla plant, which solves the problem of variety degeneration in natural propagation and artificial planting of paris polyphylla. The method comprises the steps of (1) cultivating tissue culture seedlings; (2) performing colchicines treating, namely performing treatment by one of the following two methods: firstly, selecting a tissue subculture seedling under a germfree condition, forming a plurality of wounds at the stem part, closely covering the tissue subculture seedling by degreasing cotton, dropping a colchicines solution on the degreasing cotton for soaking, performing culture on a differentiation culture medium, cleaning the tissue subculture seedling by germfree water, cutting the tissue subculture seedling into single buds, and transferring the single buds into a rooting induction culture medium; and secondly, transferring the tissue culture seedling into the differentiation culture medium added with colchicines, after culture is performed, cutting the tissue culture seedling into single buds, and transferring the single buds into a cluster bud induction culture medium; (3) performing differentiation culture on the plant; (4) performing multiplication culture on the plant; (5) detecting chromosomes of the plant; and (6) selecting and culturing the autotetraploid plant. The method disclosed by the invention has a great significance on enlarging of the planting area of peculiar valuable medicinal plants.
Owner:华颂种业(北京)股份有限公司

Culturing method for sunflower callus tissue

The invention provides a culturing method for sunflower callus tissue. The culturing method comprises the following steps that after a sunflower seed is soaked, water on the seed surface is absorbed up, and then the sunflower seed is disinfected with chlorine gas; the disinfected seed is inoculated on an aseptic seedling culture medium, and the aseptic seedling culture medium is placed in a constant-temperature dark environment to enable the seed to germinate after inoculation and then transferred to a constant-temperature greenhouse to continue to grow after the seed germinates; cotyledon and true leaves of an inoculated aseptic seedling are selected as explants and placed on an induction medium after the edges of the cotyledon and the true leaves are cut off, the surfaces of the cotyledon and the true leaves are gently pressed with blunt tweezers to enable the cotyledon and the true leaves to be closely attached to the surface of the induction medium, and an opening is sealed with two layers of paraffin wax sealing membranes; after being inoculated, the explants are placed in a constant-temperature biochemical incubator to be cultured until the callus tissue grows out; the callus tissue is cut off and transferred and inoculated into a subculture medium to continue to be cultured until the callus tissue grows to a stable period, and culturing is completed. According to the culturing method, the culturing cycle is shortened by utilizing the cotyledon of the aseptic seedling as the explant and the appropriate hormone concentration.
Owner:SOUTH CENTRAL UNIVERSITY FOR NATIONALITIES

Seedless monordica grosvenori and cultivating method thereof

The present invention discloses a pipless fructus momordicae and the cultivation method. The cultivation method is: 1) breeding the tissue cultivation seedling with the male and the female ex-plant of diploid fructus momordicae; 2) doubly introducing the chromosome with the tissue-cultivation successive-transfer seedling; 3) performing the differential cultivation with different parts of the maleand the female plants after introducing treatment; 4) cutting the stem tip and the stem section of the sprout differentially cultivated to perform the gemmulation cultivation; 5) examining the numberof the chromosome of a cultivated entire plant to select the tetraploid plant for performing the root cultivation and the seedling exercise; 6) planting the tetraploid plant and the diploid plant according to the conventional techniques and performing the artificial pollination to get the hybrid seed when in flower; 7) breeding the hybrid seed to be a complete plant and examining the number of the chromosome; selecting the triploid plant to perform the root cultivation and seedling exercise; 8) planting the triploid plant and the diploid plant and performing the artificial pollination on the male diploid plant with the female triploid plant when in flower; the pipless fructus momordicae can be obtained after the fruiting of the female plant.
Owner:桂林亦元生现代生物技术有限公司

Method for producing allopolyploid misgurnus anguillicaudatus through inhibiting fertilized egg polar body release

The invention discloses a method for producing allopolyploid misgurnus anguillicaudatus through inhibiting fertilized egg polar body release. According to the method, diploid misgurnus anguillicaudatus, tetraploid misgurnus anguillicaudatus and paramisgurnus dabryanus are adopted as propagation parents and are used for hybrid fertilized eggs, such that the hybrid fertilized eggs are obtained; on the 5th minute after the hybrid fertilized eggs are obtained, the hybrid fertilized eggs are soaked in ice water with a temperature of 2-3 DEG C for cold shock treatment with a duration of 30-35min; and the eggs are hatched and cultured under room temperature, such that misgurnus anguillicaudatus allopolyploids are obtained. With the method, allotriploid misgurnus anguillicaudatus, allotetraploid misgurnus anguillicaudatus and allopentaploid misgurnus anguillicaudatus can be obtained. With the method, the induced misgurnus anguillicaudatus allopolyploid variety number is high, and the amount is high. The induction success rate is high, and the offspring growth is fast. With the method, the weight of 12-month-age misgurnus anguillicaudatus is increased by an average of -19.99% to 142.34% than that of a normal selfing control group. The weight gain effect is significant. The method has high popularization benefit.
Owner:HUAZHONG AGRI UNIV

Preparation method of high-purity paclitaxel

The invention provides a preparation method of high-purity paclitaxel. The preparation method comprises the following steps: (1) establishing a stable taxus chinensis forming layer stem cell culture system; (2) adding taxus chinensis endophytic fungi extract liquid into a suspension culture medium, inoculating taxus chinensis cells, performing the ventilation culture for 6 to 8 days under an artificial lighting condition, and adding jasmonic acid methyl ester and a clinacanthus nutans extract into the liquid suspension culture medium to continue the culture; (3) collecting the taxus chinensiscells, and performing the coarse extraction of paclitaxel; (4) purifying a crude extract; and (5) enabling a concentrated solution II to pass through a C18 high-performance liquid phase chromatographic purification column, eluting by using methanol, collecting and combining paclitaxel elution parts, decompression evaporating the solvent methanol, crystallizing and releasing the paclitaxel, centrifugally collecting crystals, collecting and combining the paclitaxel elution part, decompression evaporating the solvent methanol to crystallize and precipitate the paclitaxel, centrifugally collectingthe crystals, and vacuum freeze drying the crystals, thus obtaining the high-purity paclitaxel concentrated solution II. The preparation method has the characteristics of high induction success rate,high paclitaxel extraction purity and the like.
Owner:覃家日

Induction method for autotetraploids of pomegranates

The invention provides an induction method for autotetraploids of pomegranates. The induction method comprises the following steps: (1) harvesting pomegranate fruits matured by selfing, taking seeds, cleaning with clean water, drying in the sun, treating the dried seeds in the condition with the temperature of 4 DEG C for 4 days, then putting into a calorstat with the temperature of 27 DEG C and germinating to be in a budding state; (2) soaking the budding pomegranate seeds obtained in the step (1) by using a colchicine solution with the mass-percentage concentration of 0.3%, simultaneously putting the pomegranate seeds on a sunshine-shading constant-temperature swinging bed with the temperature of 25 DEG C, carrying out oscillatory induction culture for 24 hours at speed of 100r/min, and using tap water to soak and clean for 3-5 times with 5 minutes for each time after treatment. The induction method provided by the invention has the advantages that the defect of tedious operation of the general ploidy-induction method is overcome, the operation is simple and easy, the success rate of induction is high, and the need for seed selection of polyploidy is met, so that the polyploidy breeding becomes an important method for genetic improvement and new-variety breeding of the pomegranates.
Owner:攀枝花市农林科学研究院
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