30 results about "Brachypodium distachyon" patented technology

The invention relates to a haynaldia villosa's 6VS chromosome specific molecular marker 6VS-BH1 and an application thereof, and belongs to the technical fields of molecular biology and genetic breeding science. The labeled primer 6VS-BH1 is developed on the basis of wheat-brachypodium distachyon comparative genomics means, and the specific sequence is 6VS-BH1F, as shown in SEQ ID NO.1, and 6VS-BH1R, as shown in SEQ ID NO.2. The molecular marker 6VS-BH1 has the advantages of wide annealing temperature range (60-66 DEG C), good stability, strong product brightness, high resolution and the like. The molecular marker 6VS-BH1, as a co-dominant marker, not only can be used for effectively tracing haynaldia villosa's 6VS chromosome in wheat background, but also can be used for distinguishing a homozygote and heterozygote and for distinguishing a Pm21 gene carried translocation line T6VS.6AL and a PmV gene carried translocation line T6VS.6DL. Therefore, the molecular marker 6VS-BH1 disclosed by the invention has an important practical value in the molecular marker-assisted selection breeding of wheat powdery mildew and the pyramiding breeding of Pm21 gene and PmV gene.

The invention relates to rapid identification of anti-powdery-mildew gene of Brachypodium distachyon, relates to the knowledge of plant comparative genomics, genetics, biological information and other subjects, and belongs to the scientific field of plant biotechnology. The rapid identification of anti-powdery-mildew gene of Brachypodium distachyon comprises the main steps of: (1) downloading full genome sequences of Brachypodium distachyon and collecting MLO (mildew resistance locus o) type gene; (2) identifying the MLO type gene; (3) analyzing the MLO type gene historical development relation; and (4) comparing the MLO type powdery mildew gene. According to the rapid identification of anti-powdery-mildew gene of Brachypodium distachyon provided by the invention, the excavation period of the anti-powdery-mildew gene of Brachypodium distachyon is effectively shortened, and the rapid identification of the powdery mildew gene is facilitated; the identified powdery mildew gene can be used for developing corresponding coseparation functional markers (SNP (single nucleotide polymorphism), SCAR (sequence-characterized amplified region), and the like), and can also be rapidly used for assisted selection of molecule markers of anti-powdery-mildew gene, and the accuracy is high; development of multi-resistance breeding materials can be carried out by combining with other anti-disease gene molecule markers, the breeding time is shortened and the breeding efficiency is improved; and foundation is established for expounding the molecular mechanism of the anti-powdery-mildew gene of Brachypodium distachyon.

The invention belongs to the technical field of plant breeding and discloses a PpCER1-2 gene, a vector and application of the PpCER1-2 gene in improvement of the drought resistance of gramineous plants. The sequence of the PpCER1-2 gene is as shown in SEQ ID NO: 1. The application of the PpCER1-2 gene in improvement of the drought resistance of the gramineous plants is provided. Experiments provethat cuticle alkane substances of a PpCER1-2 gene transferred and ultra-expressed Brachypodium distachyon blade are increased, the water loss of the surface of the blade is relieved, the chlorophyll leaching rate is reduced, and the growth condition of seedlings in drought environment also proves that the PpCER1-2 gene can effectively improve the drought resistance of the gramineous plants. The gramineous plants are important grain crops and garden green land plants, and after the drought resistance of the gramineous plants is improved by the PpCER1-2 gene, the use amount of irrigation water can be reduced, meanwhile, the problem of crop yield reduction caused by water shortage in the high-temperature weather in summer can be solved, and the application prospect is good.

The invention discloses a culture medium and a method for rapidly inducing seeds of brachypodium distachyon to generate calluses. Filexide (FPX) and CuSO4 are added to an MS basic culture medium. Theseeds of brachypodium distachyon are cut by a surgical knife to break dormancy of the seeds, the rapid calluses of the seeds of brachypodium distachyon are obtained under the synergistic action of FPX, and the induction rate is as high as 98.3%. The culture medium and method can be directly used for induction of the calluses of the seeds of brachypodium distachyon, shorten time of plant tissue culture, and lay a foundation for accelerating plant transgenic breeding.

The invention discloses a corn gene ZmSCL14 Application in regulating flowering period of plants. The maize gene ZmSCL14 The nucleotide sequence of is shown in SEQ ID NO.1. The present invention utilizes the existing plant genetic engineering technology to obtain the recombinant overexpression vector, and then uses the Agrobacterium infection transformation method to transform the Brachypodium distachyon callus, and obtains the homozygous overexpression vector through tissue culture, identification and screening. ZmSCL14 Genes of Brachypodium distachyon plants. To compare it with wild-type plants grown under the same conditions, overexpressing ZmSCL14 The Brachypodium distachyon of the gene exhibits a late flowering phenotype, delays the flowering of Brachypodium distachyon, and can also slow down the growth rate of Brachypodium distachyon plants, and participates in the regulation of the expression of genes related to flowering, so ZmSCL14 The gene can be used to breed late-flowering or dwarf varieties, and has high agricultural application value.

The invention provides a brachypodium distachyon functional centromere histone CENH3 and application. Firstly, the nucleotide sequence of a brachypodium distachyon functional centromere histone CENH3 gene is predicted through the bioinformatics sequence comparison method, a polypeptide is synthesized according to a segment of specific sequence of the N end of an amino acid sequence encoded by the nucleotide sequence, New Zealand white rabbits are conventionally immuned through the polypeptide, antiserums are prepared, and a CENH3 protein antibody is obtained through antigen affinity purification. The CENH3 antibody can be used for immunostaining experiments, physical positioning of centromere and chromatin immunoprecipitation (ChIP) experiments, the functional DNA sequence of a brachypodium distachyon functional centromere is obtained, positioning of centromere genome genetic maps and physical maps is carried out, and important tools and information are provided for research of centromere formation and function exercise mechanisms and building of artificial chromosomes.

The invention discloses a transgenic plant and a preparation method thereof. The transgenic plant comprises a DREB1-like gene shown as SEQ ID NO:1 in a sequence table. The preparation method comprisesthe steps that RNA of brachypodium distachyon is extracted; the RNA is subjected to inverse transcription into cDNA; the cDNA is taken as a template, and a first forward primer and a first reverse primer are utilized for PCR amplification to obtain an amplification product; the amplification product is connected with a carrier to obtain a connected product; the connected product is transferred into a competent cell to obtain a converted product; positive monoclone is screened from the converted product to obtain recombinant plasmid; the DREB1-like gene on the recombinant plasmid is inserted into a skeleton carrier to obtain a recombinant carrier; the recombinant carrier is transferred into agrobacterium to obtain recombinant bacteria; the recombinant bacteria are transferred into a plantto obtain the T0 generation of transgenic plant; and the T0 generation of positive transgenic plant is screened. The transgenic plant comprises the DREB1-like gene, and the DREB1-like gene can give the transgenic plant the characteristic of resisting oxidative stress.

The invention relates to a method for regulating the synthesis and metabolism of plant ferulic acid BdREF2 The gene and its application belong to the field of genetic engineering; the present invention isolates a coniferous aldehyde dehydrogenase gene from the Brachypodium distachyon cDNA library, named as BdREF2 ; using the CRISPER / Cas9 gene editing system to convert the Brachypodium distachyon genome BdREF2 gene knockout, discovery BdREF2 The mutation of the plant can reduce the content of ferulic acid esters in the cell wall of the plant, and the degradation efficiency of the biomass is significantly improved, indicating that BdREF2 The gene can be applied to the genetic improvement of grass biomass degradability; the present invention directly proves for the first time that the REF homologous gene involved in the regulation of ferulic acid biosynthesis can be applied to the genetic improvement of grass biomass degradation conversion efficiency , which is of great value for the efficient utilization of biomass resources such as gramineous energy grasses, forage grasses, and crop straws.

The invention relates to a haynaldia villosa's 6VS chromosome specific molecular marker 6VS-BH1 and an application thereof, and belongs to the technical fields of molecular biology and genetic breeding science. The labeled primer 6VS-BH1 is developed on the basis of wheat-brachypodium distachyon comparative genomics means, and the specific sequence is 6VS-BH1F, as shown in SEQ ID NO.1, and 6VS-BH1R, as shown in SEQ ID NO.2. The molecular marker 6VS-BH1 has the advantages of wide annealing temperature range (60-66 DEG C), good stability, strong product brightness, high resolution and the like. The molecular marker 6VS-BH1, as a co-dominant marker, not only can be used for effectively tracing haynaldia villosa's 6VS chromosome in wheat background, but also can be used for distinguishing a homozygote and heterozygote and for distinguishing a Pm21 gene carried translocation line T6VS.6AL and a PmV gene carried translocation line T6VS.6DL. Therefore, the molecular marker 6VS-BH1 disclosed by the invention has an important practical value in the molecular marker-assisted selection breeding of wheat powdery mildew and the pyramiding breeding of Pm21 gene and PmV gene.

The invention relates to the technical field of plant genetic engineering, and provides a wheat promoter induced by rust fungus and its application. The promoter is derived from the wheat germin-like protein gene, its nucleotide sequence is shown in SEQ ID NO: 1, and the length is 672bp. The inventor transforms it with a recombinant expression vector containing the promoter and the green fluorescent protein (GFP) gene The model plant, Brachypodium, verified that the promoter was induced by rust to enhance expression. Utilizing this characteristic, the promoter can be applied to inducible overexpression or RNAi silencing research of target genes or gene fragments in wheat crops, so as to realize functional analysis of genes or genetic engineering breeding.

The invention discloses a method for genetically transforming Brachypodium distachyon by inflorescence dipping, comprising: A, transformation of Agrobacterium EHA105 and identification of positive clones; B, dipping of Agrobacterium inflorescences of Brachypodium distachyon; C, transgenic two Positive plants of T0 generation of Brachypodium paniculata were obtained. The invention avoids the culture process of the callus through the genetic transformation method of the inflorescence mediated by the agrobacterium, saves a lot of time, and provides an effective and fast method for obtaining transgenic plants for the genetic improvement of crops.

The invention provides an application of coded proteins of drought resisting and salt resisting gene of brachypodium distachyon. The nucleotide sequence of the gene is a sequence as shown in SEQ ID NO.1 or a nucleotide sequence complementary as shown in SEQ ID NO.1. The protein is obtained by coding the gene according to the claim 1, and the amino acid sequence of the protein is as shown in SEQ IDNO.2. The gene is applied to improving tolerance of plants to drought and salt resistance. The gene adjusted plant keeps cell moisture by accumulating through matters. ROS accumulation is reduced andthe cytomembrane oxidizing damage caused by active oxygen is reduced by improving the activity of an antioxidant enzyme system. By accelerating closing of pores under drought, the drought and salt resistance of transgenic tobacco is improved by way of reducing water damaged by means of transpiration, improving the expression level of stress related genes and the like. Drought and salt resisncve of the transgenic tobacco with the gene is dependent on adjustment of ABA synthesis and an ABA signal channel.

The invention provides a brachypodium distachyon drought-resistant gene and an expression vector as well as coding protein and application thereof. The nucleotide sequence of the gene is the sequenceshown by SEQ ID NO.1 or a nucleotide sequence complementary to the sequence shown by SEQ ID NO.1. The protein is obtained by coding the gene of claim 1, and the amino acid sequence of the protein is shown by SEQ ID NO.2. The gene is used for improving application of the plant tolerance to drought stress. The gene provided by the invention regulates the plant to close pores to reduce the moisture lost in transpiration; a stronger root system is obtained in a drought condition so as to guarantee moisture absorption; moreover, the gene can improve the activity of such enzymes as catalase, peroxidase and superoxide dismutase in the antioxidase system and eliminate reactive oxygen species (ROS) in time, thereby reducing the oxidative damage of cells caused by the ROS and improving the plant tolerance to drought.

The invention discloses an endogenous reference gene suitable for brachypodium distachyon exogenous gene detection and copy number analysis, and application thereof. Through bioinformatics analysis and molecular biology experimental verification, a BDFIM gene serving as the endogenous reference gene for transgenic brachypodium distachyon qualitative and quantitative polymerase chain reaction (PCR) detection and copy number analysis is found from the brachypodium distachyon, and the nucleotide sequence of the gene is as shown in SEQ ID NO.1. The endogenous reference gene can be applied to qualitative and quantitative detection of the exogenous gene of the transgenic brachypodium distachyon, and also can be applied to analysis on the copy number of the exogenous gene in the transgenic brachypodium distachyon species.

The present invention relates to the field of plant biotechnology, in particular to the cloning and application of a gene INDETERMINATE1 (ID1) regulating the plant height of gramineous plants. The inventors isolated and cloned a homologous ID1 gene from Brachypodium distachyon and wheat, and incorporated They were named BdID1 and TaID1. The inventors connected the full-length cDNA of BdID1 and TaID1 of the A and B genomes to the expression vector initiated by the overexpression vector, and transformed Brachypodium distachyon by Agrobacterium infection, and found that the above-mentioned genes can make the two Brachypodium tachypodium appeared dwarf traits.

The invention discloses a culture medium for cultivating a transgenic plant. The culture medium group comprises a callus induction culture medium, a subculture culture medium, a co-culture culture medium, a screening culture medium and a regeneration culture medium. Experiment results show that: with a transformation system and a transformation method of the present invention, average every 100 brachypodium distachyon immature embryos can produce about 103 positive transformation seedlings, wherein a positive seedling transformation rate achieves 103.4%, and is far higher than positive seedling transformation rates of the traditional and grain model plant rice, and the highest rice positive seedling transformation rate is 47.6% (Chinese Bulletin of Botany, 2008, 25(3),322-331). With the efficient agrobacterium transformation system of the brachypodium distachyon, the important technology means is provided for temperate zone and grain plant gene function researches.

The invention belongs to the technical field of plant breeding, and discloses a PpCER1-2 gene, a carrier and its application in improving the drought resistance of gramineous plants; the sequence of the PpCER1-2 gene is: SEQ ID NO:1. The present invention provides the application of PpCER1-2 gene in improving the drought resistance of gramineous plants; experiments prove that the PpCER1-2 gene has been transferred into and overexpressed Brachypodium distachyon leaves cuticle alkanes increase, and the water loss on the leaf surface slows down , the chlorophyll extraction rate decreased, and the growth of its seedlings in a drought environment also proved that the PpCER1‑2 gene can effectively improve the drought resistance of plants. Grasses are important food crops and garden green space plants. After improving the drought resistance of grasses through the present invention, the amount of irrigation water can be reduced, and at the same time, the problem of crop yield reduction caused by water shortage in summer high temperature weather can be enhanced, which has good application prospect.