Abstract:
BACKGROUND:Oligonucleotide microarray-based comparative genomic hybridization (CGH) offers an attractive possible route for the rapid and cost-effective genome-wide discovery of deletion mutations. CGH typically involves comparison of the hybridization intensities of genomic DNA samples with microarray chip representations of entire genomes, and has widespread potential application in experimental research and medical diagnostics. However, the power to detect small deletions is low. RESULTS:Here we use a graduated series of Arabidopsis thaliana genomic deletion mutations (of sizes ranging from 4 bp to ~5 kb) to optimize CGH-based genomic deletion detection. We show that the power to detect smaller deletions (4, 28 and 104 bp) depends upon oligonucleotide density (essentially the number of genome-representative oligonucleotides on the microarray chip), and determine the oligonucleotide spacings necessary to guarantee detection of deletions of specified size. CONCLUSIONS:Our findings will enhance a wide range of research and clinical applications, and in particular will aid in the discovery of genomic deletions in the absence of a priori knowledge of their existence.
journal_name
BMC Genomicsjournal_title
BMC genomicsauthors
Belfield EJ,Brown C,Gan X,Jiang C,Baban D,Mithani A,Mott R,Ragoussis J,Harberd NPdoi
10.1186/1471-2164-15-224subject
Has Abstractpub_date
2014-03-22 00:00:00pages
224issn
1471-2164pii
1471-2164-15-224journal_volume
15pub_type
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