Abstract: The present invention discloses RNAi constructs derived from a Fusarium chitin synthase gene Chs3b, which has a nucleotide sequence as shown by SEQ ID NO: 1. Five distinct RNAi vectors are constructed for 5 different segments of the Chs3b gene (named Chs3b-1, 2, 3, 4, and 5, respectively), and separately transformed into Fusarium. It is found that siRiNAs in the transformed Fusarium shows a significant inhibition in fungal growth, development, and pathogenicity. The expression of the RNAi vectors against Chs3b in plants may inhibit the infection of Fusarium and improve the resistance of the transgenic plants to Fusarium head blight.

Abstract: A whole-genome sequencing method, including: 1) extracting a whole-genome DNA and constructing a BAC library; 2) constructing mixing pools; 3) extracting DNA of the mixing pools; 4) performing pair-end sequencing for the DNA from the mixing pools; 5) scanning sequences of each mixing pool to obtain a feature sequence set and a k-mer set of each mixing pool; 6) analyzing a corresponding feature sequence set and a corresponding k-mer set of each clone; 7) constructing clone contigs; 8) dividing the k-mer sets of the clones into small k-mer sets and positioning the small k-mer sets; 9) assembling the NGS sequences to yield sequence contigs; 10) positioning the sequence contigs, connecting the sequence contigs and determining directions thereof; and 11) determining relative positions and directions of the clone contigs, and connecting the sequences of clone contigs as whole stripe of chromosome sequences.

Abstract: The present invention provides a rice whole genome breeding chip and the application thereof. The rice whole genome breeding chip of the present invention is Rice60K, an SNP chip manufactured based on Infinium technique. Each chip can detect 24 samples simultaneously and contains 58,290 SNP sites. The marker sites have DNA sequences represented by SEQ ID NO.1-58290. The chip can be used in molecular marker fingerprint analysis of the rice variety resources, in genotype identification of the hybrid progeny population, in identification of the variety authenticity, in analysis and screening of the genetic background of the breeding materials, and in association analysis of the agronomic traits, having wide application prospects.

Abstract: The present invention provides a rice whole genome breeding chip and the application thereof. The rice whole genome breeding chip of the present invention is Rice60K, an SNP chip manufactured based on Infinium technique. Each chip can detect 24 samples simultaneously and contains 58,290 SNP sites. The marker sites have DNA sequences represented by SEQ ID NO.1-58290. The chip can be used in molecular marker fingerprint analysis of the rice variety resources, in genotype identification of the hybrid progeny population, in identification of the variety authenticity, in analysis and screening of the genetic background of the breeding materials, and in association analysis of the agronomic traits, having wide application prospects.

Abstract: Rice OXHS4 gene controlling root growth and conferring enhanced drought resistance, and use thereof in genetic improvement of rice drought resistance is provided. OXHS4 gene is cloned using candidate gene screening method. Drought stress experiments at seedling stage and adult plant stage shows that overexpression of OXHS4 gene can improve drought resistance of transgenic rice, while the oxhs4 mutant exhibits sensitivity to drought, showing the function of said gene and the use thereof.

Abstract: A rice microRNA, miR164 gene, that controls plant root system development and fertility, is obtained through gene isolation, cloning and function verification. Uses of a nucleic acid fragment comprising miR164, which fragment may confer a transformed plant with the ability to increase root number and to alter fertility, wherein the said nucleic acid fragment is selected from one of the following nucleotide sequences: 1) a DNA sequence as shown in SEQ ID NO: 1; 2) a RNA sequence as shown in SEQ ID NO:2; or 3) the conserved sequence of miR164 having the same function as 1) or 2). The nucleotide sequence containing the precursor of miR164 is ligated with an exogenous promoter and introduced into rice to obtain transgenic rice plants which has large root systems but became infertile. The fertility can be restored by external application of phytohormones.

Abstract: Rice OsSRO1C gene conferring enhanced drought resistance of a plant is provided, wherein the said gene encodes an amino acid sequences as set forth in SEQ ID NO: 2. DNA constructs, transgenic plants or cells comprising the OsSRO1C gene and the uses of the OsSRO1C gene in improving though resistance of a plant are also provided. The OsSRO1C gene controlling rice drought resistance is cloned by screening a rice T-DNA insertion mutant database and determination of expression level and identification of drought stress phenotype, which shows that the mutant is co-segregated with the drought susceptible phenotype.

Abstract: A genetically modified OsbZIP46CA1 gene is provided. Use of the modified gene in controlling drought resistance of a plant such as rice, and plants and cells comprising the modified gene are also provided.

Abstract: The cloning and application of a pleiotropic gene Ghd7 that controls grains yield, heading date and plant height of rice are provided. The gene has the nucleotide sequence as shown in SEQ ID NO: 1. The sequence of the present gene is 3,917 bp in length, contains two exons and encodes 257 amino acids. The cDNA sequence of the gene is as shown in SEQ ID NO: 1. The present gene encodes a protein having the CCT domain of CO protein and having the amino acid sequence as shown in SEQ ID NO: 1. Rice plants transformed with GHD7 gene are obtained using transgenic technology. The transgenic plants all exhibit markedly increased yield, larger number of spikelets per panicle, delayed heading date and elevated plant height as compared to their respective controls (wild type receptors plants). The trait changes are quite consistent with the phenotypes of the two parent genotypes of GHD7 near isogenic lines of Zhenshan 97.

Abstract: The isolation, cloning of an enhancin gene bel1 from Bacillus thuringiensis, and the use of an enhancin Bel1 in biological insecticides are disclosed in the present invention. A new enhancin gene bel1 is isolated from Bacillus thuringiensis subsp. kurstaki YBT-1520, and its encoded product is a new enhancin Bel1. The enhancin has very strong effect-enhancing activity on the insecticidal action of insecticidal crystal protein Cry1Ac in killing Lepidoptera insects. The insecticidal activity of genetically engineered Bacillus thuringiensis BMB0187 developed on the basis of this enhancin is 5.7 times as high as that of the initial strain.

Abstract: A method of co-extracting multiple proteins from chicken egg white is provided. Precipitate proteins step-by-step with polyethylene glycol, then separate the proteins via Q Sepharose Fast Flow anion-exchange chromatography. The method of co-extracting multiple proteins from chicken egg white is capable of obtaining five proteins simultaneously in one extraction process, and the protein products have high purity and high recovery ratio. And the method can be carried out only requiring common-used chromatographic filler, greatly reduces production cost, and provides favorable factors for large-scale industrial production of extracting protein from egg white.

Abstract: The present invention relates to an isolated polynucleotide capable of giving a plant tolerance to drought and/or salt stress, which comprises a polynucleotide sequence as shown in SEQ ID NO:1, and to a promoter capable of giving a plant tolerance to drought and/or salt stress. The present invention also relates to an expression vector comprising the said polynucleotide and/or the said promoter, and to a host cell transformed or transfected by the said expression vector. The present invention further relates to a use of the said polynucleotide or promoter sequence in improvement of plant tolerance to drought and/or salt stress.

Abstract: The isolation, cloning of an enhancin gene bel1 from Bacillus thuringiensis, and the use of an enhancin Bel1 in biological insecticides are disclosed in the present invention. A new enhancin gene bel1 is isolated from Bacillus thuringiensis subsp. kurstaki YBT-1520, and its encoded product is a new enhancin Bel1. The enhancin has very strong effect-enhancing activity on the insecticidal action of insecticidal crystal protein Cry1Ac in killing Lepidoptera insects. The insecticidal activity of genetically engineered Bacillus thuringiensis BMB0187 developed on the basis of this enhancin is 5.7 times as high as that of the initial strain.

Abstract: A histone deacetylase gene OsHDT1 which enhances utilization of heterosis in rice is isolated and cloned, said gene consisting of: 1) the DNA sequence of positions 1-894 in SEQ ID NO:1 in the Sequence listing; or 2) a DNA sequence which encodes the same protein as that encoded by the DNA sequence of 1). The histone deacetylase gene OsHDT1 is associated with enhanced utilization of heterosis in rice. When the transgenic plants having no phenotype were crossed with “Zhenshan 97A”, the F1 overexpression hybrid plants have obviously earlier flowering period than F1 wild-type hybrid plants. Moreover, the RNAi inhibition hybrid plants have a decreased seed setting rate compared to the negative control hybrid plants, while the parent RNAi inhibition plants and negative control plants shows no evident difference in the trait of seed setting rate. Western blotting revealed that the gene is capable of deacetylating histone, mainly at H4K16 site.

Abstract: A rice microRNA, miR164 gene, that controls plant root system development and fertility, is obtained through gene isolation, cloning and function verification. Uses of a nucleic acid fragment comprising miR164, which fragment may confer a transformed plant with the ability to increase root number and to alter fertility, wherein the said nucleic acid fragment is selected from one of the following nucleotide sequences: 1) a DNA sequence as shown in SEQ ID NO: 1; 2) a RNA sequence as shown in SEQ ID NO:2; or 3) the conserved sequence of miR164 having the same function as 1) or 2). The nucleotide sequence containing the precursor of miR164 is ligated with an exogenous promoter and introduced into rice to obtain transgenic rice plants which has large root systems but became infertile. The fertility can be restored by external application of phytohormones.

Abstract: The present invention pertains to the field of rice genetic engineering. Specifically, the present invention relates to a rice OsNHAD gene that enhances tolerance to salt stress, which was obtained through gene isolation, cloning and function verification, and also to use of the gene in genetic improvement of salt tolerance of rice. Said gene is selected from one of the following nucleotide sequences: 1) the nucleotide sequence from positions 60 to 1649 of SEQ NO: 1 in the Sequence Listing; or 2) a nucleotide sequence that encodes the same protein as that encoded by 1). Transgenic rice plants obtained by introducing into rice the nucleotide sequence comprising OsNHAD gene operably ligated with exogenous promoter had enhanced salt tolerance.

Abstract: The cloning and application of a pleiotropic gene Ghd7 that controls grains yield, heading date and plant height of rice are provided. The gene has the nucleotide sequence as shown in SEQ ID NO: 1. The sequence of the present gene is 3,917 bp in length, contains two exons and encodes 257 amino acids. The cDNA sequence of the gene is as shown in SEQ ID NO: 1. The present gene encodes a protein having the CCT domain of CO protein and having the amino acid sequence as shown in SEQ ID NO: 1. Rice plants transformed with GHD7 gene are obtained using transgenic technology. The transgenic plants all exhibit markedly increased yield, larger number of spikelets per panicle, delayed heading date and elevated plant height as compared to their respective controls (wild type receptors plants). The trait changes are quite consistent with the phenotypes of the two parent genotypes of GHD7 near isogenic lines of Zhenshan 97.

Abstract: The invention belongs to the technical field of genetic engineering of agricultural microorganisms. Specifically, the invention relates to producing and using gene cluster for thuringiensin synthesis from Bacillus thuringiensis. The gene cluster includes 11 genes of thuA, thuB, thuC, thuD, thuE, thuF, thuG, thu1, thu2, thu3 and thu4. These genes have the nucleotide sequence as shown in SEQ ID NO: 1. And the thuringiensin biosynthetase encoded by these genes have the amino acid sequences as shown in SEQ ID NO: 2-12. The genes according to the invention and the proteins encoded by those genes can be used as new nucleosides lead compound of pesticide library and provide new target for developing insecticides. In practical use, a series of new, efficient and low toxic insecticide can be obtained by structure modification.

Abstract: The present invention relates to an isolated polynucleotide capable of giving a plant tolerance to drought and/or salt stress, which comprises a polynucleotide sequence as shown in SEQ ID NO:1, and to a promoter capable of giving a plant tolerance to drought and/or salt stress. The present invention also relates to an expression vector comprising the said polynucleotide and/or the said promoter, and to a host cell transformed or transfected by the said expression vector. The present invention further relates to a use of the said polynucleotide or promoter sequence in improvement of plant tolerance to drought and/or salt stress.

Abstract: The present invention discloses the isolation, cloning and use of insecticidal crystal proteins from Bacillus thuringiensis. The present invention isolates a novel insecticidal crystal protein gene cry7Ba1 from B. thuringiensis subsp. huazhongensis YBT-978 strain, and said gene encodes a novel insecticidal crystal protein Cry7Ba1, which shows insecticidal activity against Lepidopteran insects. The present invention also discloses the gene sequence of the novel insecticidal crystal protein, uses suitable expression vectors to transform micro-organisms so as to express the product Cry7Ba1 encoded by the gene and make it exert the insecticidal activity of the protein against Lepidopteran pests.