Wheat one of the most important cereal crop, feeds about 40% of the
global population. Due to the very large size of the genome,
presence of three homoeologus groups with 80% repetitive DNA in the
genome; makes any attempt of achieving success in wheat molecular
mapping extremely challenging. Also, since recombination rates vary
in different parts of the genome, there is a clear need to
construct the physical maps, which can then be compared with
genetic maps to make them useful for both marker assisted selection
and map-based cloning.This study on bread wheat (Triticum aestivum
L. em Thell.) was undertaken mainly to develop whole genome
physical map of simple sequence repeats (SSRs; also described as
microsatellites) including both, genomic-SSRs (gSSRs) and expressed
sequence tag-SSRs (EST-SSRs). In this context, a total of 1508 SSRs
were attempted for physical mapping; of these only 641 SSRs could
be mapped to 1028 loci. The present study will certainly attract
the attention of researchers, scientist and plant breeders working
on wheat and other cereal crops particularly in areas of molecular
mapping in wheat.
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