Search results

Sort By:

Limit search:

Transfer to wheat (Triticum aestivum) of small chromosome segments from rye (Secale cereale) carrying disease resistance genes

100%

Fu S., Tang Z., Ren Z., Zhang H.

vol. 51

issue 2

115-121

One hundred wheat lines, derived from monosomic additions of chromosome 1R of rye inbred line R12 (Chinese rye), were detected by PCR amplification using rye-specific primer pairs. Only 5 wheat lines, 1R296, 1R330, 1R314, 1R725, and 1R734, were determined to contain rye chromatin. While 1R296 and 1R330 were highly susceptible to stripe rust and powdery mildew, 1R314, 1R725 and 1R734 were highly resistant to both diseases. Acid-polyacrylamide gel electrophoresis showed that the ?secalin bands were absent in 1R314, but present in the other 4 wheat lines. Genomic in situ hybridization indicated that 1R296, 1R330, and 1R725 contained translocations involving the whole short arm of chromosome 1R. However, 1R314 and 1R734 contained a pair of wheat chromosomes with small, terminal, rye-derived chromosome segments. The results suggest that the translocation breakpoint of 1RS in 1R314 was located between the Sec-1 locus and the disease-resistance loci, while in line 1R734, the breakpoint was located between the Sec-1 locus and the centromere. Taking account of the improved disease resistance of 1R725, 1R314 and 1R734, the chromosome arm 1RS of R12 may represent new and valuable disease resistance resources for wheat improvement.

CdSe/ZnS Colloidal Quantum Dots with Alloyed Core/Shell Interfaces: A Photoluminescence Dynamics Study

76%

Dziatkowski K., Ratchford D., Hartsfield T., Li X., Gao Y., Tang Z.

Acta Physica Polonica A

2011

vol. 120

issue 5

870-873

Time-resolved photon counting technique was employed to study dynamics of photoluminescence from the ensemble and single CdSe/ZnS quantum dots with the alloyed core/shell interfaces. The ensemble data revealed enhanced effect of disorder-induced trap states for increasing emission energy, as implied from the changes in the distribution of total decay rates. The emission trajectories collected for single quantum dots showed familiar, two-state blinking pattern. It suggests that in a large-band-offset CdSe/ZnS system, the introduced alloying of the core-to-shell region cannot smooth enough the confinement potential in order to suppress nonradiative Auger recombination and blinking.

Refine search results

1 Acta Physica Polonica A

1 Journal of Applied Genetics

1 2011

1 2010

2 Tang Z.

1 Dziatkowski K.

1 Fu S.

1 Gao Y.

1 Hartsfield T.

1 Li X.

1 Ratchford D.

1 Ren Z.

1 Zhang H.

Search results

Transfer to wheat (Triticum aestivum) of small chromosome segments from rye (Secale cereale) carrying disease resistance genes

CdSe/ZnS Colloidal Quantum Dots with Alloyed Core/Shell Interfaces: A Photoluminescence Dynamics Study