芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calc...芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calcaroides,表现为外稃顶端或是稃芒基部异形凸起,形成呈钩状不完全花器结构,属基部钩芒类型。突变体芒较短并伴随抽穗期推迟,株高、穗长和穗粒数显著降低等表型。遗传分析表明,突变体的芒型突变性状受单隐性基因cal-d控制。前期利用cal-d导入系BW106×Bowman的F_(2)群体,结合简化基因组测序(GBS,genotyping by sequencing)分析,将cal-d基因初步定位于3H染色体。进一步利用来自F_(2)的杂合单株,包括13000株单株的F_(2:3)群体进行精细定位,最终将cal-d基因定位于3H染色体153~329 Mb区间的近着丝粒区域。通过转录组混池测序分析结合大麦基因组和表达谱资源数据库,初步筛选了9个候选基因。本研究结果为大麦芒型突变基因cal-d的克隆与功能验证奠定了基础,对于解析麦类作物芒的遗传发育机制具有重要的意义。展开更多
Photoperiodic response is an important characteristic that plays an important role in plant adaptability for various environments. Wheat cultivars grow widely and have high yield potential for the strong photoperiod a...Photoperiodic response is an important characteristic that plays an important role in plant adaptability for various environments. Wheat cultivars grow widely and have high yield potential for the strong photoperiod adaptibility. To assess the photoperiodic response of different genotypes in wheat cultivars, the photoperiodic effects of the Ppd-D1 alleles and the expressions of the related TaGI, TaCO and Ta FT genes in Liaochun 10 and Ningchun 36 were investigated under the short-day（6 h light, SD）, moderate-day（12 h light, MD） and long-day（24 h light, LD） conditions. Amplicon length comparison indicated that the promoter of Ppd-D1 in Ningchun 36 is intact, while Liaochun 10 presented the partial sequence deletion of Ppd-D1 promoter. The durations of all developmental stages of the two cultivars were reduced by subjection to an extended photoperiod, except for the stamen and pistil differentiation stage in the Liaochun 10 cultivar. The expression levels of the Ppd-D1 alleles and the TaGI, TaCO and TaFT genes associated with the photoperiod pathway were examined over a 24-h period under SD and MD conditions. The relationships of different photoperiodic responses of the two cultivars and the expression of photoperiod pathway genes were analyzed accordingly. The photoperiod insensitive（PI） genotype plants flower early under SD; meanwhile, the abnormal expression of the Ppd-D1 a allele is accompanied with an increase in Ta FT1 expression and the TaCO expression variation. The results would facilitate molecular breeding in wheat.展开更多
Meanwhile the outbreak of the Covid-19 since December, 2019 in China, it has killed more than a hundred thousand of people of all ages and sex across the globe in a short span of time. On the bases of this study the n...Meanwhile the outbreak of the Covid-19 since December, 2019 in China, it has killed more than a hundred thousand of people of all ages and sex across the globe in a short span of time. On the bases of this study the nearest family member of the virus and its receptor binding domain of S protein including its model structure and function of its active sites were naked through Multiple Sequence Alignment, modelling and molecular docking software accordingly its repository genome databases. The virus was genetically associated and molecular evolutionary related with (<em>RaTG</em>13) and it scores 96.12% homology with 99% query coverage followed by <em>bat-SL-CoVZC</em>45 and<em> bat-SL-CoVZXC</em>21 notch 89.12% and 88.65% respectively. However, SARS and MERS corona type virus those outbreak earlier respectively less likely family members of 2019-nCoV. Though the virus has a close genetic association with those previous SARS coronaviruses, and certainly the spike protein used as a binding receptor to fight against human receptor protein of ACE 2, but on the basis of FRODOC and HDOCK server analysis multi favorable active sites of S protein was discovered such GLN493 shown as a finest key in both model and possessed a unique traits on it resulting unexpected rate of transmission and number of people died while compared to the previous one. TYR500, ASN501, GLN498 and others residues preferably contemplate site also. In particular, the diversity of the virus in the world may be due to the genome structure of the virus and S gene changed over the time, across the world against to host of human genetic diversity, which may be more robust, and may be a new and unique feature. This is because it is characterized close to contact with distance divergence between wild type novel coronavirus which was risen from China against to the genomes from Lebanon, India, Italy, and USA and so on. Thus, the World Health Organization and its researchers should focus on immunologic research and effective drug and vaccine development that will help to address the epidemiology of the virus, which can provide a long-term solution.展开更多
文摘芒是麦类作物穂部器官的重要组成部分,在提高籽粒产量、促进种子传播和防御虫害等方面具有重要作用。大麦具有丰富的芒型突变体,加之其二倍体的特性,成为麦类作物芒器官形态建成研究的理想作物。本研究报道了一个大麦芒型突变体材料calcaroides,表现为外稃顶端或是稃芒基部异形凸起,形成呈钩状不完全花器结构,属基部钩芒类型。突变体芒较短并伴随抽穗期推迟,株高、穗长和穗粒数显著降低等表型。遗传分析表明,突变体的芒型突变性状受单隐性基因cal-d控制。前期利用cal-d导入系BW106×Bowman的F_(2)群体,结合简化基因组测序(GBS,genotyping by sequencing)分析,将cal-d基因初步定位于3H染色体。进一步利用来自F_(2)的杂合单株,包括13000株单株的F_(2:3)群体进行精细定位,最终将cal-d基因定位于3H染色体153~329 Mb区间的近着丝粒区域。通过转录组混池测序分析结合大麦基因组和表达谱资源数据库,初步筛选了9个候选基因。本研究结果为大麦芒型突变基因cal-d的克隆与功能验证奠定了基础,对于解析麦类作物芒的遗传发育机制具有重要的意义。
基金supported by the Key Technologies R&D Program of China during the 12th Five-Year Plan period(2011BAD16B07,2013BAD04B01)the National Natural Science Foundation of China(31271726)
文摘Photoperiodic response is an important characteristic that plays an important role in plant adaptability for various environments. Wheat cultivars grow widely and have high yield potential for the strong photoperiod adaptibility. To assess the photoperiodic response of different genotypes in wheat cultivars, the photoperiodic effects of the Ppd-D1 alleles and the expressions of the related TaGI, TaCO and Ta FT genes in Liaochun 10 and Ningchun 36 were investigated under the short-day（6 h light, SD）, moderate-day（12 h light, MD） and long-day（24 h light, LD） conditions. Amplicon length comparison indicated that the promoter of Ppd-D1 in Ningchun 36 is intact, while Liaochun 10 presented the partial sequence deletion of Ppd-D1 promoter. The durations of all developmental stages of the two cultivars were reduced by subjection to an extended photoperiod, except for the stamen and pistil differentiation stage in the Liaochun 10 cultivar. The expression levels of the Ppd-D1 alleles and the TaGI, TaCO and TaFT genes associated with the photoperiod pathway were examined over a 24-h period under SD and MD conditions. The relationships of different photoperiodic responses of the two cultivars and the expression of photoperiod pathway genes were analyzed accordingly. The photoperiod insensitive（PI） genotype plants flower early under SD; meanwhile, the abnormal expression of the Ppd-D1 a allele is accompanied with an increase in Ta FT1 expression and the TaCO expression variation. The results would facilitate molecular breeding in wheat.
文摘Meanwhile the outbreak of the Covid-19 since December, 2019 in China, it has killed more than a hundred thousand of people of all ages and sex across the globe in a short span of time. On the bases of this study the nearest family member of the virus and its receptor binding domain of S protein including its model structure and function of its active sites were naked through Multiple Sequence Alignment, modelling and molecular docking software accordingly its repository genome databases. The virus was genetically associated and molecular evolutionary related with (<em>RaTG</em>13) and it scores 96.12% homology with 99% query coverage followed by <em>bat-SL-CoVZC</em>45 and<em> bat-SL-CoVZXC</em>21 notch 89.12% and 88.65% respectively. However, SARS and MERS corona type virus those outbreak earlier respectively less likely family members of 2019-nCoV. Though the virus has a close genetic association with those previous SARS coronaviruses, and certainly the spike protein used as a binding receptor to fight against human receptor protein of ACE 2, but on the basis of FRODOC and HDOCK server analysis multi favorable active sites of S protein was discovered such GLN493 shown as a finest key in both model and possessed a unique traits on it resulting unexpected rate of transmission and number of people died while compared to the previous one. TYR500, ASN501, GLN498 and others residues preferably contemplate site also. In particular, the diversity of the virus in the world may be due to the genome structure of the virus and S gene changed over the time, across the world against to host of human genetic diversity, which may be more robust, and may be a new and unique feature. This is because it is characterized close to contact with distance divergence between wild type novel coronavirus which was risen from China against to the genomes from Lebanon, India, Italy, and USA and so on. Thus, the World Health Organization and its researchers should focus on immunologic research and effective drug and vaccine development that will help to address the epidemiology of the virus, which can provide a long-term solution.
