Two types of markers-random amplified polymorphic DNA （RAPD） and simple sequence repeat DNA （SSR）-have been used to characterize the genetic diversity among nine mutant lines of transgenic wheat intermediated by l...Two types of markers-random amplified polymorphic DNA （RAPD） and simple sequence repeat DNA （SSR）-have been used to characterize the genetic diversity among nine mutant lines of transgenic wheat intermediated by low energy ion beam and their four receptor cultivars. The objectives of this study were to analyze RAPD-based and SSR-based genetic variance among transgenic wheat lines and with their receptors, and to find specific genetic markers of special traits of transgenic wheat lines. 170 RAPD primers were amplified to 733 fragments in all the experimental materials. There were 121 polymorphic fragments out of the 733 fragments with a ratio of polymorphic fragments of 16.5%. 29 SSR primer pairs were amplified to 83 fragments in all the experiment materials. There were 57 polymorphic fragments out of the 83 fragments with a ratio of polymorphic fragments of 68.7%. The dendrograms were prepared based on a genetic distance matrix using the UPGMA （Unweighted Pair-group Method with Arithmetic averaging） algorithm, which corresponded well to the results of the wheat pedigree analysis and separated the 13 genotypes into four groups. Association analysis between RAPD and SSR markers with the special traits of transgenic wheat mutant lines discovered that three RAPD markers, sl, opt- 16, and f14, were significantly associated with the muticate trait, while three SSR markers, Rht8 （Xgwm261）, Rht-Blb, and Rht-Dlb, highly associated with the dwarf trait. These markers will be useful for marker-assistant breeding and can be used as candidate markers for further gene mapping and cloning.展开更多
Ⅰ. INTRODUCTION Tree peony (Paeonia suffruticosa, Ranunculuaceae) is one of the most famous ornamental plants with fairy large and beautiful flowers, which has been cultivated in China for over 2000 years, and celebr...Ⅰ. INTRODUCTION Tree peony (Paeonia suffruticosa, Ranunculuaceae) is one of the most famous ornamental plants with fairy large and beautiful flowers, which has been cultivated in China for over 2000 years, and celebrated as the 'King of Flowers'. The natural conditions in Luoyang are favourable for the growth of tree peony. Luoyang has a long history of its cultivation and has developed a great number of fine varieties. However,展开更多
Ever since 1975, we have studied haploid seedlings and succeeded in the culture of the new wheat line, Yuhua No. 1, which is suitable for poor and dry land. So far, a favorable testtransplanting has been carried out i...Ever since 1975, we have studied haploid seedlings and succeeded in the culture of the new wheat line, Yuhua No. 1, which is suitable for poor and dry land. So far, a favorable testtransplanting has been carried out in some seventy areas, totalling 5,000mu, of Shaansi, Hebei, Shandong and Henan provinces. The yield of wheat was increased by 4—44％ more or less, surpassing that of other local popular wheat lines.展开更多
基金supported by National Key Projects of China (No.2001BA302B)
文摘Two types of markers-random amplified polymorphic DNA （RAPD） and simple sequence repeat DNA （SSR）-have been used to characterize the genetic diversity among nine mutant lines of transgenic wheat intermediated by low energy ion beam and their four receptor cultivars. The objectives of this study were to analyze RAPD-based and SSR-based genetic variance among transgenic wheat lines and with their receptors, and to find specific genetic markers of special traits of transgenic wheat lines. 170 RAPD primers were amplified to 733 fragments in all the experimental materials. There were 121 polymorphic fragments out of the 733 fragments with a ratio of polymorphic fragments of 16.5%. 29 SSR primer pairs were amplified to 83 fragments in all the experiment materials. There were 57 polymorphic fragments out of the 83 fragments with a ratio of polymorphic fragments of 68.7%. The dendrograms were prepared based on a genetic distance matrix using the UPGMA （Unweighted Pair-group Method with Arithmetic averaging） algorithm, which corresponded well to the results of the wheat pedigree analysis and separated the 13 genotypes into four groups. Association analysis between RAPD and SSR markers with the special traits of transgenic wheat mutant lines discovered that three RAPD markers, sl, opt- 16, and f14, were significantly associated with the muticate trait, while three SSR markers, Rht8 （Xgwm261）, Rht-Blb, and Rht-Dlb, highly associated with the dwarf trait. These markers will be useful for marker-assistant breeding and can be used as candidate markers for further gene mapping and cloning.
文摘Ⅰ. INTRODUCTION Tree peony (Paeonia suffruticosa, Ranunculuaceae) is one of the most famous ornamental plants with fairy large and beautiful flowers, which has been cultivated in China for over 2000 years, and celebrated as the 'King of Flowers'. The natural conditions in Luoyang are favourable for the growth of tree peony. Luoyang has a long history of its cultivation and has developed a great number of fine varieties. However,
文摘Ever since 1975, we have studied haploid seedlings and succeeded in the culture of the new wheat line, Yuhua No. 1, which is suitable for poor and dry land. So far, a favorable testtransplanting has been carried out in some seventy areas, totalling 5,000mu, of Shaansi, Hebei, Shandong and Henan provinces. The yield of wheat was increased by 4—44％ more or less, surpassing that of other local popular wheat lines.
