37 results about "Open pollination" patented technology

An enhanced, diploid pollenizer watermelon plant and method used to maximize the yield of triploid seedless watermelons per area. The enhanced pollenizer watermelon plant of the invention is either a hybrid variety, an open-pollinated variety or a synthetic variety, that exhibits the characteristics of small leaves and fruit with a brittle rind that splits when the fruit is overripe or breaks when relatively small physical forces are applied. The watermelon plant of the invention is also preferably characterized by extended flowering duration, thereby increasing the number of triploid watermelon flowers that are pollinated and set fruit. The method for producing a seedless watermelon fruit, includes the steps of providing a pollenizer diploid watermelon plant, extending the duration of flowering of the pollenizer plant while reducing the number of such plants needed to pollenize the same number of triploid watermelon plants, and maximizing dispersal of the pollenizer watermelon plant throughout the field of triploid watermelon plants.

An enhanced, diploid pollenizer watermelon plant and method used to maximize the yield of triploid seedless watermelons per area. The enhanced pollenizer watermelon plant of the invention is either a hybrid variety, an open-pollinated variety or a synthetic variety, that exhibits the characteristics of small leaves and fruit with a brittle rind that splits when the fruit is overripe or breaks when relatively small physical forces are applied. The watermelon plant of the invention is also preferably characterized by extended flowering duration, thereby increasing the number of triploid watermelon flowers that are pollinated and set fruit. The method for producing a seedless watermelon fruit, includes the steps of providing a pollenizer diploid watermelon plant, extending the duration of flowering of the pollenizer plant while reducing the number of such plants needed to pollenize the same number of triploid watermelon plants, and maximizing dispersal of the pollenizer watermelon plant throughout the field of triploid watermelon plants.

A process for breeding plants which comprises growing plants of a species in an array of containers charged with growing medium of uniform characteristics in an environment of controlled climatic conditions with controlled supply of nutrients and feed water and changing the positions of the containers within the environment as required to ensure at least substantially uniform exposure of all plants in the containers to conditions in the environment. A process for the breeding of open pollinating plants in a greenhouse environment is also provided. A process for breeding plants which comprises identifying trait leads.

The invention belongs to the field of creation of new crop germplasm, and relates to a distant hybridization technology and a conventional field hybridization technology in brassica of brassicaceae, in particular to a method for creating a new yellow-seeded brassica napus germplasm. The method comprises the following steps: selecting a Chinese cabbage (genome is AA, and n is equal to 10) with yellow seed property and a wild cabbage (genome is CC, and n is equal to 9) with yellow seed property as parents; hybridizing the Chinese cabbage with the wild cabbage, and obtaining allotetraploid hybrid seedlings, namely the brassica napus (genome is AACC, and n is equal to 19) by utilizing an embryo rescue technology and a chromosome doubling technology; harvesting seeds after open pollination during a blooming period; and planting the allotetraploid hybrid seedlings in a field in the next year, hybridizing by manually bagging every two single plants during the blooming period and then harvesting seeds, screening plants with yellow seeds and finally obtaining the yellow-seeded brassica napus germplasm by adopting a pedigree selection method. The method provided by the invention has the advantages of high efficiency and short breeding period, and the obtained yellow-seeded germplasm can be used for breeding a yellow-seeded brassica napus variety.

The invention discloses a rapid propagation method of radish breeding material. The method comprises the following steps: (S010), mesh enclosure setting up, namely respectively matching, assembling, connecting and fixing long rods, cross rods, vertical columns, three-way connecting rings and vertical column bases; (S020) radish parent material planting, namely respectively, sequentially and intensively planting male parent and female reproduced by parent of radish sterile line and radish hybridized combination according to a certain line number; (S030) radish flowering phase management, namely removing heteromorphic plant after transplanted radish plant survives, removing fertile plant and keeping sterile plant for a sterile line from radish bolting to an initial flowering phase, keeping completely fertile plant with typical shapes and normal floral organs for maintainer line and male parent line, and applying insecticide for one time 7 to 10 days before osmia is released; (S040) osmia release and management, namely putting osmia into a mesh enclosure in the initial flower stage of radish, ensuring that osmia performs open pollination, and recycling and storing the osmia after pollination; and (S050) seed harvesting. The method is simple to operate and low in cost, and can obviously improve the seed output.

The invention discloses a method for breeding high-yield sorbifolium sorbifolium strains. The method comprises: collecting open-pollinated seeds of high-yield Xanthocarpus sorbifolium, after germination, using SSR molecular markers to identify the male parent, screening for a self-compatibility rate of more than 60%, an ovule fertility rate of more than 90%, and a single plant seed yield Compared with the control tree under the same conditions, the mother plant is more than 30% higher; take the sorbifolium sorbifolium container sapling as the rootstock, graft the selected single plant scion, identify the male parent of the seeds, and confirm that it is self-fertilization. Carry out the second generation grafting and paternal identification. If the self-fertilization is confirmed again, the mother plant is determined to be the final single plant; the scion is taken, and the 3-5-year-old X. radix radix seedlings are used as the rootstock to graft and multiply to obtain a self-fertile high-yield X. sorbifolia strain. The invention adopts means such as SSR molecular markers, container seedling cultivation, grafting and the like to carry out self-fertile high-yield improved variety cultivation of X. sorbifolium, so as to solve the shortage problem of high-yield improved variety of X. sorbifolium.

The invention discloses a pollination technology for improving the quality of Majia pomelo. The pollination technology comprises the following steps: S1, selection of Majia pomelo plants which normally grow and are in a fruiting period; S2, selection of pollen parents and preparation of pollen; and S3, open pollination. According to the pollination technology for improving the quality of the Majia pomelo, firstly, artificial cross pollination is adopted, sister line, sibling line and distant line varieties are used as male parents, main cultivated Majia pomelo is used as female parents for artificial pollination, and natural pollination is used as a control. Analysis on pollinated fruits shows that the seed number, the single fruit weight, the edible rate and the like of the hybridized fruits are obviously increased compared with those of naturally pollinated fruits, meanwhile, the fruit acidity and the fruit peel thickness are reduced, and the fruit flavor and benefits are improved. The technology can be popularized to a Majia pomelo plantation, three to four directions of each mu can be selected to plant one thick-skin Majia pomelo as a pollination tree according to the factors such as the flowering phase and the seed number, and the technology has an obvious effect on increasing the yield and improving the quality of the Majia pomelo.

The invention relates to the field of selective breeding of wheat, and in particular discloses a selective breeding method of a high-yield and disease-resistant purple grain wheat line. The selective breeding method comprises the steps of carrying out backcross on purple grain wheat Luozhen No. 1 and dwarf-male-sterile wheat for a plurality of times to breed purple grain dwarf-male-sterile wheat; after that, carrying out crossbreeding through fully open free pollination by taking the purple grain dwarf-male-sterile wheat as a female parent and taking Zhoumai No. 22 and Jimai No. 22 as male parents to obtain purple grain hybrid F0 generation; screening the purple grains in the purple grain hybrid F0 generation for planting, and breeding the high-yield and disease-resistant purple grain wheat line by means of self-cross selective breeding of more generations, wherein the purple grain wheat grains of the last generation are selected for planting in the process of self-cross selective breeding. The method takes the Luozhen No. 1, the dwarf-male-sterile wheat, the Zhoumai No. 22 and the Jimai No. 22 as parents, and implements open pollination in the selective breeding process so as to enable genes to make full exchange; good genes and target shapes are effectively aggregated, so that a large number of outstanding single plants appear in the group, and the purple grain wheat progress is accelerated; the new purple grain wheat line obtained by selective breeding is high in yield and good in disease resistance.

The invention belongs to the plant cross breeding technical field and relates to a breeding method of the chili pepper filial generation, in particular to a rapid purifying and selecting method of the chili pepper filial generation. Currently, the prior purifying and selecting method of chili pepper filial generation is poor in stability and consistency of progeny, can not satisfy the basic requirements of novelty, stability and consistency of new crop varieties at home and abroad and has the disadvantages of labor consuming and time consuming, low selecting efficiency and low accuracy. The rapid purifying and selecting method of the chili pepper filial generation provided by the invention adopts single hill double-strain field planting, ntaneous open pollination and insect prevention during efflorescence pollination period of Mengo and pair fruit in the selecting of the filial generation and selects single fruits at the first segment and the second segment for the seed selection after 80 percent of plant fruits ripe. Obvious outcrossing single fruit systems are eliminated in the field. Stable and consistent chili pepper breeds or strains which accord with objective traits can be selected within short time.

The invention discloses a method for preparing synthetic hybrid seeds by utilizing a cytoplasmic male sterile line of kenaf. The method comprises the following specific steps of: (1) hybridizing the cytoplasmic male sterile line of the kenaf as a female parent with a male sterile maintainer line to reproduce the cytoplasmic male sterile line, hybridizing the cytoplasmic male sterile line as the female parent with a restoring line to prepare F1-generation hybrid seeds, and hybridizing the F1-generation hybrid seeds as a male parent with the cytoplasmic male sterile line of the female parent of the F1-generation hybrid seeds as the female parent so as to construct permanent separated groups; (2) carrying out mixed planting on the plurality of permanent separated groups, and selecting relatively consistent single sterile plants into one group to obtain a plurality of basic groups; (3) carrying out open pollination on all the groups, and after multiple generations, combining plant lines without separation in all the groups to obtain a plurality of groups with balanced inheritance; (4) identifying the groups with balanced inheritance and selecting the groups conforming to the breeding object, i.e., the synthetic hybrid seeds. The method disclosed by the invention has the advantages that the prepared synthetic hybrid seeds can be utilized by multiple generations, and farmers do not need to buy the hybrid seeds for every year, so that the planting cost of the kenaf is reduced.

The invention relates to a method for inducing industrial pure female marihuana. Pins of a main stem and side branches of a female plant are sprayed twice with a silver thiosulfate (STS) solution by adopting a method so as to induce the female plant to generate male flower buds, the female plant is converted into monoecism, and set seeds after open pollination are industrial pure female marihuana seeds. The concentration of the STS solution is 0.2-2mmol / L and the solution is prepared by mixing AgNO3 and Na2S2O3 mother liquor according to the molar concentration of Ag<+> to S2O3<2-> of 1:4. Based on the situation that the industrial marihuana in China is dioecious, the chemical induction is carried out on the industrial marihuana in a special growing period to obtain an industrial pure female marihuana group. The method is easy to operate and low in cost, and has a relatively good application prospect in the aspects such as simplification of a hybrid seed production process of the industrial marihuana, development of selfing purification of the industrial marihuana, and the like.

The invention provides a one-hole-multiple-plants inbred line breeding method capable of enhancing the density-tolerant property and lodging resistance of maize. The method comprises the following steps that firstly, hybrid seeds obtained through hybridization of two excellent maize varieties serve as S0 generation of seeds, superior plants selected from the S0 generation to be inbred, and S1 generation of seeds are obtained; secondly, the S1 generation is planted in a one hole-multiple-plants mode at high density, female and male coordinated individual plants are inbred, and seed reservation is conducted on each inbred ear with the grain weight per ear in the top 10%; thirdly, the S2 generation is planted in the one hole-multiple-plants mode at high density according to ear rows, the female and male coordinated individual plants are selected in five holes at one end of each ear row to be inbred, the other individual plants are subjected to open pollination, and triple screening is conducted on the ear rows; fourthly, the S3 generation is planted, the S3 generation and 4-5 existing common inbred lines are subjected to test cross, multi-point testing is conducted on the test cross F1, screening is conducted according to high adaptability, good quality, ordinary yield and high combining ability, and the selected ear rows are the maize density-tolerant lodging-resistant inbred lines. By means of the method, the underground root system and aerial roots of the bred inbred lines are very developed, and the maize has good density-tolerant and lodging-resistant abilities.