GrainGenes Reference Report: HER-86-738
Reference
HER-86-738
Title
Evolutionary dynamics and chromosomal distribution of repetitive sequences on chromosomes of Aegilops speltoides revealed by genomic in situ hybridization
Journal
Heredity
Year
2001
Volume
86
Pages
738-742
Author
Belyayev A Raskina O Nevo E
Abstract
Summary: Simultaneous genomic in situ hybridization (GISH) with probe preannealing was used to detect the relationship between chromosomal position and sequence conservation on Aegilops speltoides var. aucheri chromosomes. DNA of Secale sylvestre, Hordeum spontaneum, Festuca pratensis, Semiarundinaria fastuosa, Arundo donax and Zea mays that represent several main groups of Poaceae were used as probes. Different GISH-banding patterns that characterize diverse evolutionary trajectories in the repetitive DNA fraction and correlate with evolutionary distance between tested species were observed. Fast-evolving sequences were detected in subterminal telomeric and subtelomeric heterochromatic regions, whereas sequences in pericentromeric regions showed high levels of conservation. GISH experiments revealed extensive conservation in NOR regions on chromosomes 1 and 6 which, in fact, appears to be a complicated mix of rDNA clusters and heterochromatin blocks of different nucleotide composition
External Databases
Pubmed: 11595054
Keyword
aegilops
[ Show all 46 ]
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: HER-86-738
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
| ||||
|
|
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||