Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: GNM-44-128

[Submit comment/correction]

Reference	GNM-44-128
Title	Different chromosomal distribution patterns of radiation-induced interchange breakpoints in barley: First post-treatment mitosis versus viable offspring
Journal	Genome
Year	2001
Volume	44
Pages	128-132
Author	Kunzel G Gecheff KI Schubert I
Abstract	Summary: Translocation breakpoints (TBs) induced by ionizing radiation are nonrandomly distributed along barley chromosomes. When first post-treatment mitoses were evaluated, centromeres and the heterochromatin-containing proximal segments tended to be more than randomly involved, and terminal segments to be less than randomly involved in translocations. Contrary to this, small chromosomal regions in median and distal arm positions, characterized by high recombination rates and high gene density, were identified as preferred sites for the origination of viable translocations, probably due to deviations in chromatin organization. Apparently, the position of a TB has an influence on the rate of viability versus elimination of the carrier cells. Surprisingly, TBs within centromeres and heterochromatin-containing segments seem to be more harmful for survival than those induced in gene-rich regions
Keyword	[ Hide all but 1 of 36 ] barley breakpoint distribution canada carrier cell centromere chromatin chromatin organization chromosome common wheat density elimination gene gene-rich regions genetic genome hordeum vulgare ionizing radiation karyotype mitosis molecular biology mutagens nor organization physical map position radiation radiation-induced chromosome breaks rates recombination segment site survival translocation translocation lines viability

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.