Genotyping DNA pools on microarrays: tackling the QTL problem of large samples and large numbers of SNPs.
Genotyping DNA pools on microarrays: tackling the QTL problem of large samples and large numbers of SNPs.
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微阵列上的基因分型DNA池:解决大型样品和大量SNP的QTL问题。
DOI:
10.1186/1471-2164-6-52
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发表时间:
2005-04-05
期刊:
影响因子:
4.4
通讯作者:
Schalkwyk, LC
中科院分区:
文献类型:
--
作者:
Meaburn, E;Butcher, LM;Liu, L;Fernandes, C;Hansen, V;Al-Chalabi, A;Plomin, R;Craig, I;Schalkwyk, LC
Quantitative trait locus (QTL) theory predicts that genetic influence on complex traits involves multiple genes of small effect size. To detect QTL associations of small effect size, large samples and systematic screens of thousands of DNA markers are required. An efficient solution is to genotype case and control DNA pools using SNP microarrays. We demonstrate that this is practical using DNA pools of 100 individuals. Using standard microarray protocols for the Affymetrix GeneChip® Mapping 10 K Array Xba 131, we show that relative allele signal (RAS) values provide a quantitative index of allele frequencies in pooled DNA that correlate 0.986 with allele frequencies for 104 SNPs that were genotyped individually for 100 individuals. The sensitivity of the assay was demonstrated empirically in a spiking experiment in which 15% and 20% of one individual's DNA was added to a DNA pool. We conclude that this approach, which we call SNP-MaP (SNP microarrays and pooling), is rapid, cost effective and promises to be a valuable initial screening method in the hunt for QTLs.
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