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Sequence based novel genomic microsatellite markers for robust genotyping purposes in foxtail millet [Setaria italica (L.) P. Beauv.]

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Title Sequence based novel genomic microsatellite markers for robust genotyping purposes in foxtail millet [Setaria italica (L.) P. Beauv.]
 
Creator Gupta, Sarika
Kumari, Kajal
Sahu, Pranav Pankaj
Vidapu, Sudhakar
Prasad, Manoj
 
Subject Foxtail millet (Setaria italica L.)
Microsatellite
Comparative mapping
Transferability
Genetic diversity
 
Description The unavailability of microsatellite markers and saturated genetic linkage map has restricted the genetic improvement of foxtail millet [Setaria italica (L.) P. Beauv.], despite the fact that in recent times it has been documented as a new model species for biofuel grasses. With the objective to generate a good number of microsatellite markers in foxtail millet cultivar 'Prasad', 690 clones were sequenced which generated 112.95 kb high quality sequences obtained from three genomic libraries each enriched with different microsatellite repeat motifs. Microsatellites were identified in 512 (74.2%) of the 690 positive clones and 172 primer pairs (pp) were successfully designed from 249 (48.6%) unique SSR-containing clones. The efficacies of the microsatellite containing genomic sequences were established by superior primer designing ability (69%), PCR amplification efficiency (85.5%) and polymorphic potential (52%) in the parents of F(2) mapping population. Out of 172 pp, functional 147 markers showed high level of cross-species amplification (~74%) in six grass species. Higher polymorphism rate and broad range of genetic diversity (0.30-0.69 averaging 0.58) obtained in constructed phylogenetic tree using 52 microsatellite markers, demonstrated the utility of markers in germplasm characterizations. In silico comparative mapping of 147 foxtail millet microsatellite containing sequences against the mapping data of sorghum (~18%), maize (~16%) and rice (~5%) indicated the presence of orthologous sequences of the foxtail millet in the respective species. The result thus demonstrates the applicability of microsatellite markers in various genotyping applications, determining phylogenetic relationships and comparative mapping in several important grass species.
We are grateful to the Director, National Insti-
tute of Plant Genome Research (NIPGR) for providing facilities. Dr.
Sarika Gupta acknowledges the award of DST-Young Scientist fel-
lowship (SR/FT/LS-152/2008) from the Department of Science &
Technology (DST), Government of India. The study was supported by
DST, DBT and NIPGR core grant.
 
Date 2014-05-09T11:37:59Z
2014-05-09T11:37:59Z
2012
30 September 2011
 
Type Article
 
Identifier Plant Cell Reports, 31(2): 323-337
http://hdl.handle.net/123456789/234
 
Language en
 
Publisher Springer Science