In order to obtain marker-free transgenic rice with improved disease resistance, the AP1 gene of Capsicum annuum and hygromycin-resistance gene （HPT） were cloned into the two separate T-DNA regions of the binary vec...In order to obtain marker-free transgenic rice with improved disease resistance, the AP1 gene of Capsicum annuum and hygromycin-resistance gene （HPT） were cloned into the two separate T-DNA regions of the binary vector pSB130, respectively, and introduced into the calli derived from the immature seeds of two elite japonica rice varieties, Guangling Xiangjing and Wuxiangjing 9, mediated by Agrobacterium-mediated transformation. Many cotransgenic rice lines containing both the AP1 gene and the marker gene were regenerated and the integration of both transgenes in the transgenic rice plants was confirmed by either PCR or Southern blotting technique. Several selectable marker-free transgenic rice plants were subsequently obtained from the progeny of the cotransformants, and confirmed by both PCR and Southern blotting analysis. These transgenic rice lines were tested in the field and their resistance to disease was carefully investigated, the results showed that after inoculation the resistance to either bacterial blight or sheath blight of the selected transgenic lines was improved when compared with those of wild type.展开更多
CrylAb gene was transformed into four rice varieties, Zhejing 22, Zhejing 27, Jiahua 1 and Xiushui 63 mediated by Agrobacterium-mixture co-transformation. Rice genotype had an important effect on callus induction and ...CrylAb gene was transformed into four rice varieties, Zhejing 22, Zhejing 27, Jiahua 1 and Xiushui 63 mediated by Agrobacterium-mixture co-transformation. Rice genotype had an important effect on callus induction and transformation efficiency. Different mixtures of Agrobacterium strains （EHA105 and EHA101） contained Hpt and CrylAb genes resulted in different frequencies of resistant calli. There was no correlation between the frequency of transformants with the ratio of the Agrobacterium strain mixture contained Hpt and CrylAb genes. A total of 509 transgenic plants were obtained from the four rice varieties, and 272 T2 progenies were analyzed for CrylAb and Hpt genes. PCR analysis revealed that 412 regenerated plants were Hpt positive （80.94%）, 62 plants were also CrylAb co-transformants （15.05% in total frequency）, and 42 plants among the 272 T2 progenies were CrylAb positive but Hpt negative. This suggests that marker-free transgenic plants could be produced by co-transformation mediated by mixed Agrobacterium strains with the selectable marker gene and target gene Southern blot analysis of five independent marker-free T2 transgenic lines co-transformed from Zhejing 22 showed that CrylAb gene had been inserted into rice genome with a single copy. The transgenic plants showed significantly stronger resistance to lepidopteron than the non-transgenic plants under no application of insecticides against lepidopteron.展开更多
Transgenic plants, despite a great deal of scientifi c evidences, have induced a number of environmental and consumer concerns for long time because various antibiotic resistance genes, according to common
Rxol cloned from maize is a non-host gene resistant to bacterial leaf streak of rice. pCAMBIA1305-1 with Rxo1 was digested with Sca I and NgoM IV and the double right-border binary vector pMNDRBBin6 was digested with ...Rxol cloned from maize is a non-host gene resistant to bacterial leaf streak of rice. pCAMBIA1305-1 with Rxo1 was digested with Sca I and NgoM IV and the double right-border binary vector pMNDRBBin6 was digested with Hpa I and Xma I. pMNDRBBin6 carrying the gene Rxo1 was acquired by ligation of blunt-end and cohesive end. The results of PCR, restriction enzyme analysis and sequencing indicated that the Rxo1 gene had been cloned into pMNDRBBin6. This double right-border binary vector, named as pMNDRBBin6-Rxol, will play a role in breeding marker-free plants resistant to bacterial leaf streak of rice by genetic transformation.展开更多
目的分析孕中期羊水游离RNA(AfcfRNA)转录组,筛选神经发育共表达关键基因。方法利用基因共表达网络分析,建立AfcfRNA转录组的基因共表达网络模块。筛选各共表达模块中的神经特异性基因,建立神经系统特异性共表达模块。利用基因间相互作...目的分析孕中期羊水游离RNA(AfcfRNA)转录组,筛选神经发育共表达关键基因。方法利用基因共表达网络分析,建立AfcfRNA转录组的基因共表达网络模块。筛选各共表达模块中的神经特异性基因,建立神经系统特异性共表达模块。利用基因间相互作用筛选神经组织特异性共表达模块中的关键基因。结果通过加权基因共表达网络分析共建立27个以颜色命名的共表达模块,在Human Protein Atlas数据库中筛选到832个神经组织特异性基因。在蓝色、棕色、蓝绿色以及黄色模块中富集到前脑发育、神经突触组装和功能、神经递质释放过程、轴突发生以及学习和记忆过程相关的GO术语。通过基因间相互作用以及基因在孕中期的平均表达量分析,共发现蓝色模块(SLC18A3、TACR3、SYT2)、棕色模块(SSTR5、STX1A、SNAP25、GHSR、SSTR4、GABBR2)、蓝绿色模块(DRD2、SLC32A1、GNG3、OPN4、PENK)以及黄色模块(RAB3A、HCRT、GRM5)中的17个关键基因。结论该研究获得了神经系统发育密切相关的并且具有共表达关系的关键基因,可作为潜在的产前诊断中监测神经系统发育的标志物。展开更多
基金This paper is translated from its Chinese version in Scientia Agricultura Sinica.This study was supported by the Government of Jiangsu Province,China(BG2002301 and JH02-106)National Transgenic Plant R&D Project(JY03-B-10)+1 种基金National Natural Science Foundation of China(30170567)Department of Education of Jiangsu Goverment,China(K05015).
文摘In order to obtain marker-free transgenic rice with improved disease resistance, the AP1 gene of Capsicum annuum and hygromycin-resistance gene （HPT） were cloned into the two separate T-DNA regions of the binary vector pSB130, respectively, and introduced into the calli derived from the immature seeds of two elite japonica rice varieties, Guangling Xiangjing and Wuxiangjing 9, mediated by Agrobacterium-mediated transformation. Many cotransgenic rice lines containing both the AP1 gene and the marker gene were regenerated and the integration of both transgenes in the transgenic rice plants was confirmed by either PCR or Southern blotting technique. Several selectable marker-free transgenic rice plants were subsequently obtained from the progeny of the cotransformants, and confirmed by both PCR and Southern blotting analysis. These transgenic rice lines were tested in the field and their resistance to disease was carefully investigated, the results showed that after inoculation the resistance to either bacterial blight or sheath blight of the selected transgenic lines was improved when compared with those of wild type.
基金supported by the Zhejiang Provincial Natural Science Foundation of China (Grant No.Z305650 and No.Y3080361)the Science and Technology Department of Zhejiang Province,China (Grant No.2004C12020)+1 种基金the National Key Technology Research & Development Program,China (Grant No.2006BAD01A01-5 and No.2008ZX08001-001)the 151 Foundation for the Talents of Zhejiang Province,China
文摘CrylAb gene was transformed into four rice varieties, Zhejing 22, Zhejing 27, Jiahua 1 and Xiushui 63 mediated by Agrobacterium-mixture co-transformation. Rice genotype had an important effect on callus induction and transformation efficiency. Different mixtures of Agrobacterium strains （EHA105 and EHA101） contained Hpt and CrylAb genes resulted in different frequencies of resistant calli. There was no correlation between the frequency of transformants with the ratio of the Agrobacterium strain mixture contained Hpt and CrylAb genes. A total of 509 transgenic plants were obtained from the four rice varieties, and 272 T2 progenies were analyzed for CrylAb and Hpt genes. PCR analysis revealed that 412 regenerated plants were Hpt positive （80.94%）, 62 plants were also CrylAb co-transformants （15.05% in total frequency）, and 42 plants among the 272 T2 progenies were CrylAb positive but Hpt negative. This suggests that marker-free transgenic plants could be produced by co-transformation mediated by mixed Agrobacterium strains with the selectable marker gene and target gene Southern blot analysis of five independent marker-free T2 transgenic lines co-transformed from Zhejing 22 showed that CrylAb gene had been inserted into rice genome with a single copy. The transgenic plants showed significantly stronger resistance to lepidopteron than the non-transgenic plants under no application of insecticides against lepidopteron.
基金the National Natural Science Foundation of China （No. 30460081） the Scientific Research Program of the Higher Education Institution of XinJiang （2005）.
文摘Transgenic plants, despite a great deal of scientifi c evidences, have induced a number of environmental and consumer concerns for long time because various antibiotic resistance genes, according to common
文摘Rxol cloned from maize is a non-host gene resistant to bacterial leaf streak of rice. pCAMBIA1305-1 with Rxo1 was digested with Sca I and NgoM IV and the double right-border binary vector pMNDRBBin6 was digested with Hpa I and Xma I. pMNDRBBin6 carrying the gene Rxo1 was acquired by ligation of blunt-end and cohesive end. The results of PCR, restriction enzyme analysis and sequencing indicated that the Rxo1 gene had been cloned into pMNDRBBin6. This double right-border binary vector, named as pMNDRBBin6-Rxol, will play a role in breeding marker-free plants resistant to bacterial leaf streak of rice by genetic transformation.
文摘目的分析孕中期羊水游离RNA(AfcfRNA)转录组,筛选神经发育共表达关键基因。方法利用基因共表达网络分析,建立AfcfRNA转录组的基因共表达网络模块。筛选各共表达模块中的神经特异性基因,建立神经系统特异性共表达模块。利用基因间相互作用筛选神经组织特异性共表达模块中的关键基因。结果通过加权基因共表达网络分析共建立27个以颜色命名的共表达模块,在Human Protein Atlas数据库中筛选到832个神经组织特异性基因。在蓝色、棕色、蓝绿色以及黄色模块中富集到前脑发育、神经突触组装和功能、神经递质释放过程、轴突发生以及学习和记忆过程相关的GO术语。通过基因间相互作用以及基因在孕中期的平均表达量分析,共发现蓝色模块(SLC18A3、TACR3、SYT2)、棕色模块(SSTR5、STX1A、SNAP25、GHSR、SSTR4、GABBR2)、蓝绿色模块(DRD2、SLC32A1、GNG3、OPN4、PENK)以及黄色模块(RAB3A、HCRT、GRM5)中的17个关键基因。结论该研究获得了神经系统发育密切相关的并且具有共表达关系的关键基因,可作为潜在的产前诊断中监测神经系统发育的标志物。
