Chloroplast genomes of conifers are unusual in a
number of respects, including the possession of much
repetitive DNA. By studying the distribution and sequences
of dispersed repetitive DNA, I hoped to gain insight into
the mechanisms of chloroplast genome evolution.
I used restriction mapping and DNA sequencing to
characterize dispersed...
Electrophoretic karyotypes were obtained from intact cells of four wild
type strains of Tilletia caries and T. controversa, and 5 inter specific hybrid
progeny using clamped homogeneous electric field, pulsed field gel
electrophoresis (CHEF PFGE). Each karyotype was polymorphic and unique
relative to the other strains. However, the relative size...
1S801 is a transposable element isolated from Pseudomonas syringae pathovar
(pv.) phaseolicola, the causal agent of halo blight of bean. Fragments of the element are
present in multiple copies on an indigenous plasmid, pMMC7105, of strain LR781, and
have been implicated as sites of homologous recombination leading to imprecise
excision...
Inbreeding of the avirulent physiologic race 8 strains of Ustilago hordei was
purported to have increased its pathogenicity in a stepwise manner that led to a highly
pathogenic race, designated race 14. The analysis of electrophoretic karyotypes and
restriction fragment length polymorphism profiles detected with a telomere-specific probe
(TelomereRFLP) in...
Turnip yellow mosaic virus is a monopartite, plus sense RNA virus
infecting the Cruciferae, and is a model system for the study of RNA virus
replication. A cDNA clone (pTYMC) representing an infectious RNA
genome of the European isolate of TYMV was constructed and used to assess
the importance of...