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77 results about "Subfamily" patented technology

In biological classification, a subfamily (Latin: subfamilia, plural subfamiliae) is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoological names with "-inae".

Method for distant hybridization between subfamilies of cyprinus carpio and megalobrama amblycephala

A method for distant hybridization between subfamilies of cyprinus carpio and megalobrama amblycephala includes the following steps that firstly, female cyprinus carpio and male megalobrama amblycephala which have obvious sexual maturity characteristics and good somatic features are selected as parent fishes for special pool breeding, then, artificial spawning induction is conducted on the parent finishes in a breeding season, the parent fishes with a good spawning induction effect are selected to be subjected to artificial dry-method fertilization, running water incubation is conducted on fertilized embryos in a pure water incubation device, fish fry are raised after being incubated, the raised fish fry are detected and screened, hybrid offspring of the cyprinus carpio and the megalobrama amblycephala are obtained through flow cytometry DNA content determination and renal tissue chromosome ploidy detection, and the hybrid offspring comprise diploid natural gynogenesis cyprinus carpio, diploid natural gynogenesis mirror carps, diploid fish like the cyprinus carpio and tetraploid hybrid fish. The method has the advantages that the rate of fertilization is high, the incubating rate is high, the offspring are excellent in character, and the method has great significance in genetic breeding.
Owner:湖南岳麓山水产育种科技有限公司

Method for distant hybridization between subfamilies of red crucian carps and xenocypris davidi bleekers

The invention discloses a method for the distant hybridization between subfamilies of red crucian carps and xenocypri davidi bleekers, comprising the following steps: firstly, selecting red crucian carps and xenocypri davidi bleekers with maturated gonads and good body features to be respectively used as female parent fishes and male parent fishes for hybridization, and carrying out artificial induced spawning on the female and male parent fishes in a breeding season; secondly, selecting the male and the female parent fishes with good effect of induced spawning for carrying out artificial dry-method insemination, and carrying out automatic hatching in running water after the insemination is finished; thirdly, breeding hatched fries, and detecting and screening the bred fries to obtain redcrucian carp and xenocypri davidi bleeker hybridized triploid fishes, red crucian carp and xenocypri davidi bleeker hybridized tetraploid fishes and natural gynogenesis red crucian carps. In the invention, the characteristics of the bred hybridized generation are improved, and the insemination rate and the hatching rate of distant hybridization are remarkably improved; in addition, the method is anew way for generating the tetraploid fishes and the natural gynogenesis red crucian carps, and has important biological significance in the aspects of the biological evolution and the genetic breeding of fishes.
Owner:HUNAN NORMAL UNIVERSITY

Subfamily distant hybridization for German mirror carp and megalobrama amblycephala and application of tetraploid hybrid fishes

The invention discloses a subfamily distant hybridization for German mirror carp and megalobrama amblycephala. The method comprises the following steps of artificial dry-process fertilization on the ova of the pubescent German mirror carp and sperms of the megalobrama amblycephala by taking the German mirror carp as a female parent and the megalobrama amblycephala as a male parent, hatching fertilized ova at the water temperature of 19-20 DEG C, and breeding fries in a pond; then, detecting the DNA (deoxyribonucleic acid) content, the chromosome number and the blood cell sizes of the fries by a flow cytometry DNA content determination method, a chromosome ploidy detection method of peripheral blood cell culture and a blood smear method, screening, and then preparing to obtain triploid hybrid fishes and tetraploid hybrid fishes. A tetraploid fish strain which is genetically stable and has four sets of crucian carp chromosomes can be formed by subsequent self-cross selective breeding of the tetraploid hybrid fishes, and the tetraploid fish strain can be used as a resource for breeding the infertile triploid fishes. The method disclosed by the invention has the advantages that not only are the characters of hybrid offspring good but also a good foundation can be laid for variety breeding, and a precious resource is provided for subsequent breeding of new polyploid fishes.
Owner:湖南岳麓山水产育种科技有限公司

Application of SBP-box type transcription factors of switchgrass in aspect of increasing plant biomass and fermentable sugar yields

The invention discloses application of SBP-box type transcription factors of switchgrass in the aspect of increasing plant biomass and fermentable sugar yields, and belongs to the technical field of plant genetic engineering. The application mainly includes cloning genes of the SBP-box type transcription factors PvSPL1 and 2 of the switchgrass and determining sequences of the SBP-box type transcription factors of the switchgrass; inhibiting the transcription activity of integral subfamilies of the transcription factors PvSPL1 and 2 on the basis of the genes and the sequences by the aid of chimeric repressor silencing technologies (CRES-T) so as to generate transgenic switchgrass plants with increased tiller quantities. The application has the advantages that dry matter biomass of the obtained transgenic switchgrass plants can be increased by 2.0-2.3 times, and the total fermentable sugar yields can be increased by 2.0-2.2 times; the generated transgenic switchgrass energy plants can be integrated in conventional breeding projects, and accordingly precious germplasm resources can be provided for creating novel varieties of high-yield and efficiently degradable energy plants; novel targets for molecular breeding in future can be provided by the authenticated SBP-box type transcription factors PvSPL1 and 2 of the switchgrass, and the SBP-box type transcription factors PvSPL1 and 2 of the switchgrass can be used for designing oriented molecules of commercialized energy plant products.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI

Method for distant hybridization of cyprinuscarpiohaematopterus and megalobramaamblycephala subfamilies

ActiveCN106550909ASolve the problem of distant hybridizationImprove hatchabilityClimate change adaptationPisciculture and aquariaBroodstockCommon carp
The invention discloses a method for distant hybridization of cyprinuscarpiohaematopterus and megalobramaamblycephala subfamilies. The method comprises the following steps: taking cyprinuscarpiohaematopterus as female parent fish and megalobramaamblycephala as male parent fish, artificially inducing spawning of the female parent fish and the male parent fish in a breeding season, carrying out dry artificial insemination, incubating obtained fertilized roe in running water in an incubation tank to obtain hybrids of the cyprinuscarpiohaematopterus and the megalobramaamblycephala, and testing and screening the hybrids to obtain diploid cyprinuscarpiohaematopterus, diploid common-carp and crucian-carp hybrids and diploid crucian carp. The method for distant hybridization of the cyprinuscarpiohaematopterus and megalobramaamblycephala subfamilies integrates the excellent characters of the cyprinuscarpiohaematopterus and the megalobramaamblycephala, enriches the fish species on the market, lays a favorable foundation for selection and breeding of excellent species, provides precious resources for follow-up selection and breeding of novel polyploid fish and is of great biological significance in biological evolution and genetic breeding of fish.
Owner:湖南岳麓山水产育种科技有限公司
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