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2015 ; 16
(ä): 804
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Development of genome-wide InDel markers and their integration with SSR, DArT and
SNP markers in single barley map
#MMPMID26474969
Zhou G
; Zhang Q
; Tan C
; Zhang XQ
; Li C
BMC Genomics
2015[Oct]; 16
(ä): 804
PMID26474969
show ga
BACKGROUND: Development of molecular markers such as SSR (simple sequence
repeat), DArT (diversity arrays technology) and SNP (single nucleotide
polymorphism) is fundamental for linkage map construction and QTL mapping.
However, DArT and SNP genotyping require special tools, and detection of SSR
polymorphisms requires time-consuming polyacrylamide electrophoresis.
Furthermore, many markers have been mapped in different populations such that
their genetic positions are inconsistent. Recently, InDel (insertion and
deletion) markers have become popular in genetic map construction and map-based
cloning. RESULTS: Aligning genomic DNA sequences in two barley cultivars (Morex
and Barke) identified 436,640 InDels. We designed 1140 InDel markers across the
barley genome with an average genetic distance of 1 cM, each having a unique
location in the barley genome. High-resolution melting (HRM) technology was used
to genotype 55 InDel markers; those PCR amplicons with melting temperature
differences >0.3 °C were ideal for HRM genotyping. The 1140 InDel markers
together with 383 SSRs, 3909 gene-based SNPs and 1544 DArT markers were
integrated into single barley genetic map according to their physical map
positions. CONCLUSIONS: High-density InDel markers with specific genome locations
were developed, with 6976 molecular markers (SSRs, DArTs, SNPs and InDels)
integrated into single barley genetic map. HRM genotyping of the InDel markers
each with single PCR band will facilitate quick map construction and gene
fine-mapping.