Translocation lines with useful genes derived from wheat related species are valuable in wheat variety improvement. But it is not easy to produce them. The frequency of translocation line production is usually low in ...Translocation lines with useful genes derived from wheat related species are valuable in wheat variety improvement. But it is not easy to produce them. The frequency of translocation line production is usually low in wheat. So far, most of translocation lines have been obtained by spontaneous translocation method. It was once suggested that univalent chromosomes would mis divide, reunion, and form chromosome translocation at meiosis. This theory has been supported by some experiments. We designed a series of experiments to increase univalent number at meiosis to test if univalent chromosome number was related to translocation frequency. Our results showed that crossing two different wheat alien substitution lines could indeed increase the frequency of chromosome translocations.展开更多
利用已知植物抗病基因编码氨基酸保守区域NBS-LRR(核苷酸结合位点-富亮氨酸区域)设计了42个简并引物组合,运用抗病基因类似物多态性(resistance gene analog polymorphism,RGAP)分子标记技术,对中国春、中国春-长穗偃麦草双二倍体及其...利用已知植物抗病基因编码氨基酸保守区域NBS-LRR(核苷酸结合位点-富亮氨酸区域)设计了42个简并引物组合,运用抗病基因类似物多态性(resistance gene analog polymorphism,RGAP)分子标记技术,对中国春、中国春-长穗偃麦草双二倍体及其附加系和代换系基因组DNA进行PCR扩增。结果表明,共有38对引物组合获得扩增产物,其中35对在普通小麦中国春、中国春-长穗偃麦草双二倍体中能扩增出多态性,平均每个引物组合扩增出38.5个片段。在普通小麦背景下,共获得275条长穗偃麦草E基因组多态性谱带,占扩增总谱带数的17.44%,揭示出在普通小麦背景下E基因组和普通小麦A、B、D基因组间的高丰度遗传变异。另外,利用RGAP分子标记技术,构建了一套完整的长穗偃麦草1E^7E染色体的特异RGAP标记。为小麦背景中长穗偃麦草外源遗传物质的快速检测提供了新途径。展开更多
文摘Translocation lines with useful genes derived from wheat related species are valuable in wheat variety improvement. But it is not easy to produce them. The frequency of translocation line production is usually low in wheat. So far, most of translocation lines have been obtained by spontaneous translocation method. It was once suggested that univalent chromosomes would mis divide, reunion, and form chromosome translocation at meiosis. This theory has been supported by some experiments. We designed a series of experiments to increase univalent number at meiosis to test if univalent chromosome number was related to translocation frequency. Our results showed that crossing two different wheat alien substitution lines could indeed increase the frequency of chromosome translocations.
文摘利用已知植物抗病基因编码氨基酸保守区域NBS-LRR(核苷酸结合位点-富亮氨酸区域)设计了42个简并引物组合,运用抗病基因类似物多态性(resistance gene analog polymorphism,RGAP)分子标记技术,对中国春、中国春-长穗偃麦草双二倍体及其附加系和代换系基因组DNA进行PCR扩增。结果表明,共有38对引物组合获得扩增产物,其中35对在普通小麦中国春、中国春-长穗偃麦草双二倍体中能扩增出多态性,平均每个引物组合扩增出38.5个片段。在普通小麦背景下,共获得275条长穗偃麦草E基因组多态性谱带,占扩增总谱带数的17.44%,揭示出在普通小麦背景下E基因组和普通小麦A、B、D基因组间的高丰度遗传变异。另外,利用RGAP分子标记技术,构建了一套完整的长穗偃麦草1E^7E染色体的特异RGAP标记。为小麦背景中长穗偃麦草外源遗传物质的快速检测提供了新途径。
