The ability of wheat to adapt to a wide range of environmental conditions is determined mostly by allelic diversity among genes regulating vernalization requirement.Vrn-1 is a major regulator of this requirement.In th...The ability of wheat to adapt to a wide range of environmental conditions is determined mostly by allelic diversity among genes regulating vernalization requirement.Vrn-1 is a major regulator of this requirement.In this study,two novel alleles of Vrn-A1 were discovered in Chinese cultivars:vrn-A1n was identified in two landraces,Jiunong 2 and Ganchun 16,and Vrn-A1o was detected in Duanhongmangmai.Both novel alleles showed a linked duplication in the promoter region.The common copy of these two alleles was identical to the recessive allele vrn-A1.Compared with the recessive allele vrn-A1,the other copy of vrn-A1n contained a 54-bp deletion in the promoter region and the distinct copy of Vrn-A1o contained an11-bp deletion in the promoter region.In segregating populations in the greenhouse under nonvernalizing(20–25°C)and long-day(16 h light)conditions,plants with the novel vrn-A1n allele did not head earlier than those with the recessive vrn-A1 allele.However,plants that were either homozygous or heterozygous for the novel Vrn-A1o allele headed earlier than those with the recessive vrn-A1 allele.To identify the novel allele with the small-sized product and facilitate screening,a DNA marker for the novel dominant allele Vrn-A1o was designed.Analysis of the novel-allele distribution showed that two cultivars carrying the vrn-A1n allele were dispersed in the northwestern spring wheat zone,and 12 cultivars carrying the dominant Vrn-A1o allele were widely distributed in the northwestern spring wheat zone,Xinjiang winter and spring wheat zone,Yellow and Huai River valley winter wheat zone,and QinghaiTibetan Plateau spring and winter wheat zone.Our study identifies useful germplasm and a DNA marker for wheat breeding.展开更多
OsDep1(dense and erectpanicle 1)控制水稻产量性状,影响穗长、直立性和着粒密度。根据水稻OsDep1基因序列,采用同源克隆技术克隆了普通小麦第5同源群染色体上的TaDep1基因,它包含5个外显子和4个内含子,与水稻OsDep1基因结构相似。TaDe...OsDep1(dense and erectpanicle 1)控制水稻产量性状,影响穗长、直立性和着粒密度。根据水稻OsDep1基因序列,采用同源克隆技术克隆了普通小麦第5同源群染色体上的TaDep1基因,它包含5个外显子和4个内含子,与水稻OsDep1基因结构相似。TaDep1-A1、TaDep1-B1和TaDep1-D1的编码序列长度分别为918、888和900bp,编码305、295和299个氨基酸残基。在普通小麦品种中检测到5个TaDep1-A1等位变异、4个TaDep1-B1等位变异和2个TaDep1-D1等位变异。根据TaDep1-A1和TaDep1-B1位点不同等位变异间的SNP和InDel,开发了3对显性互补标记和1个共显性标记,可以准确鉴别不同等位基因。共显性标记dep19是根据TaDep1-B1第5外显子一个30bp的InDel开发的,可准确区分TaDep1-B1c与TaDep1-B1a、TaDep1-B1b和TaDep1-B1d。用这些标记对406份小麦品种进行检测,不同基因型的千粒重、株高、穗长、小穗数和穗节间均差异不显著。展开更多
本研究分析陕西地区2009-2012年度10165例造血干细胞捐献者HLA-A/B/DRB1分型中罕见等位基因的检出状况。应用PCR-SBT方法对10165陕西地区造血干细胞捐献者的HLA-A/B/DRB1进行分型。结果发现,在48例捐献者中确认罕见等位基因40种,其中在1...本研究分析陕西地区2009-2012年度10165例造血干细胞捐献者HLA-A/B/DRB1分型中罕见等位基因的检出状况。应用PCR-SBT方法对10165陕西地区造血干细胞捐献者的HLA-A/B/DRB1进行分型。结果发现,在48例捐献者中确认罕见等位基因40种,其中在15个捐献者中确认的10种等位基因虽不包含在中华骨髓库的常见及确认等位基因表(common alleles and well documented alleles,CWD)中,但已包含在美国免疫遗传协会的常见及确认的等位基因表中,分别是:A*02:04、B*07:10、B*27:09、B*35:11、B*44:29、DRB1*03:04、DRB1*08:18、DRB1*13:05、DRB1*13:14、DRB1*14:11,检出2例以上的罕见等位基因包括A*68:24、B*35:11、B*44:29、DRB1*03:04、DRB1*08:18、DRB1*13:05。本实验室从2005-2012年发现并被世界卫生组织人类白细胞抗原因子命名委员会命名的共21例新的HLA等位基因中,有些在多个实验室的多个个体被确认,现已有HLA-A*02:90、HLA-B*48:14、HLA-DRB1*01:14被列入中华骨髓库的确认及常见等位基因表。结论:在实际工作中,对于发现的新等位基因要及时上报,对确认的罕见等位基因要记录统计,保证中华骨髓库HLA基因人群分布不断累积和多态性完整,给修正中国CWD表提供依据。在参照常见及确认等位基因表进行实验分析时,对于模棱两可样本含有已确认过的罕见等位基因时要慎重取舍,以避免错检或漏检发生,保证患者尤其是携带罕见等位基因的患者最大可能的找到匹配的供者。展开更多
基金funded by the National Key Research and Development Program of China(2016YFD0101802)the Key Research and Development Project of Shaanxi Province(2019ZDLNY04-05)+1 种基金the National Basic Research Program of China(2014CB138102)the National Natural Science Foundation of China(30971770 and 31671693)。
文摘The ability of wheat to adapt to a wide range of environmental conditions is determined mostly by allelic diversity among genes regulating vernalization requirement.Vrn-1 is a major regulator of this requirement.In this study,two novel alleles of Vrn-A1 were discovered in Chinese cultivars:vrn-A1n was identified in two landraces,Jiunong 2 and Ganchun 16,and Vrn-A1o was detected in Duanhongmangmai.Both novel alleles showed a linked duplication in the promoter region.The common copy of these two alleles was identical to the recessive allele vrn-A1.Compared with the recessive allele vrn-A1,the other copy of vrn-A1n contained a 54-bp deletion in the promoter region and the distinct copy of Vrn-A1o contained an11-bp deletion in the promoter region.In segregating populations in the greenhouse under nonvernalizing(20–25°C)and long-day(16 h light)conditions,plants with the novel vrn-A1n allele did not head earlier than those with the recessive vrn-A1 allele.However,plants that were either homozygous or heterozygous for the novel Vrn-A1o allele headed earlier than those with the recessive vrn-A1 allele.To identify the novel allele with the small-sized product and facilitate screening,a DNA marker for the novel dominant allele Vrn-A1o was designed.Analysis of the novel-allele distribution showed that two cultivars carrying the vrn-A1n allele were dispersed in the northwestern spring wheat zone,and 12 cultivars carrying the dominant Vrn-A1o allele were widely distributed in the northwestern spring wheat zone,Xinjiang winter and spring wheat zone,Yellow and Huai River valley winter wheat zone,and QinghaiTibetan Plateau spring and winter wheat zone.Our study identifies useful germplasm and a DNA marker for wheat breeding.
文摘OsDep1(dense and erectpanicle 1)控制水稻产量性状,影响穗长、直立性和着粒密度。根据水稻OsDep1基因序列,采用同源克隆技术克隆了普通小麦第5同源群染色体上的TaDep1基因,它包含5个外显子和4个内含子,与水稻OsDep1基因结构相似。TaDep1-A1、TaDep1-B1和TaDep1-D1的编码序列长度分别为918、888和900bp,编码305、295和299个氨基酸残基。在普通小麦品种中检测到5个TaDep1-A1等位变异、4个TaDep1-B1等位变异和2个TaDep1-D1等位变异。根据TaDep1-A1和TaDep1-B1位点不同等位变异间的SNP和InDel,开发了3对显性互补标记和1个共显性标记,可以准确鉴别不同等位基因。共显性标记dep19是根据TaDep1-B1第5外显子一个30bp的InDel开发的,可准确区分TaDep1-B1c与TaDep1-B1a、TaDep1-B1b和TaDep1-B1d。用这些标记对406份小麦品种进行检测,不同基因型的千粒重、株高、穗长、小穗数和穗节间均差异不显著。
文摘本研究分析陕西地区2009-2012年度10165例造血干细胞捐献者HLA-A/B/DRB1分型中罕见等位基因的检出状况。应用PCR-SBT方法对10165陕西地区造血干细胞捐献者的HLA-A/B/DRB1进行分型。结果发现,在48例捐献者中确认罕见等位基因40种,其中在15个捐献者中确认的10种等位基因虽不包含在中华骨髓库的常见及确认等位基因表(common alleles and well documented alleles,CWD)中,但已包含在美国免疫遗传协会的常见及确认的等位基因表中,分别是:A*02:04、B*07:10、B*27:09、B*35:11、B*44:29、DRB1*03:04、DRB1*08:18、DRB1*13:05、DRB1*13:14、DRB1*14:11,检出2例以上的罕见等位基因包括A*68:24、B*35:11、B*44:29、DRB1*03:04、DRB1*08:18、DRB1*13:05。本实验室从2005-2012年发现并被世界卫生组织人类白细胞抗原因子命名委员会命名的共21例新的HLA等位基因中,有些在多个实验室的多个个体被确认,现已有HLA-A*02:90、HLA-B*48:14、HLA-DRB1*01:14被列入中华骨髓库的确认及常见等位基因表。结论:在实际工作中,对于发现的新等位基因要及时上报,对确认的罕见等位基因要记录统计,保证中华骨髓库HLA基因人群分布不断累积和多态性完整,给修正中国CWD表提供依据。在参照常见及确认等位基因表进行实验分析时,对于模棱两可样本含有已确认过的罕见等位基因时要慎重取舍,以避免错检或漏检发生,保证患者尤其是携带罕见等位基因的患者最大可能的找到匹配的供者。
