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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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        Abstract - Issue Nov 2010, 31 (6)                                                                                                             Back



abstract_01

Use of degenerate primers in rapid generation of microsatellite

markers in Panicum maximum

 

Kapil Kumar Tiwari*1 and Amaresh Chandra2

 

1National Research Centre on Plant Biotechnology, IARI, New Delhi - 110 012, India

2Crop Improvement Division, Indian Grassland and Fodder Research Institute, Jhansi - 284 003, India

 

(Received: May 25, 2009; Revised received: February 15, 2010; Accepted: February 26, 2010)

 

Abstract: Guineagrass (Panicum maximum Jacq.) is an important forage grass of tropical and semi-tropical regions, largely apomictic and predominantly exist in tetraploid form. For molecular breeding work, it is prerequisite to develop and design molecular markers for characterization of genotypes, development of linkage map and marker assisted selection. Hence, it is an important researchable issue to develop molecular markers in those crops where such information is scanty. Among many molecular markers, microsatellites or simple sequence repeat (SSR) markers are preferred markers in plant breeding. Degenerate primers bearing simple sequence repeat as anchor motifs can be utilized in rapid development of SSR markers; however selection of suitable degenerate primers is a prerequisite for such procedure so that SSR enriched genomic library can be made rapidly.? In the present study seven? degenerated? primers namely KKVRVRV(AG)10, KKVRVRV(GGT)5, KKVRVRV(CT)10, KKVRVRV(AAT)6, KKVRVRV(GTG)6, KKVRVRV(GACA)5 and KKVRVRV(CAA)6 were used in amplification of Panicum maximum? genomic DNA. Primers with repeat motifs? (GGT)5 and (AAT)6 have not reacted whereas (AG)10, (GACA)5 and (CAA)6 highly informative as they have generated many DNA fragments ranging? from 250 to 1600 bps as revealed from the results obtained with restriction digestion of recombinant plasmids. Primer with (CT)10 anchor repeat, amplified fragments of high molecular weight where as (GTG)6? primer generated only? six bands with low concentration indicating less suitability of these primer in SSR markers development in P. maximum.

Key words: Degenerate primers, Microsatellite markers, Panicum maximum

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