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Statistical correlations of primer thermodynamic stability DeltaG degrees for enhanced flax ISSR-PCR cultivar
1The Institute of Plant Molecular Biology, Academy of Sciences of the Czech Republic, Branisovská 31, Ceské Budejovice, CZ 370 05, Czech Republic. nfix@jcu.cz
Abstract:
We revealed four statistically significant correlations related to inter-simple-sequence repeat (ISSR) patterns: (1) between thermodynamic free energy DeltaG degrees of ISSR primer sequence and PCR reamplification intensity (dA(i)), (2) between free energy DeltaG degrees of ISSR primer sequence and PIC coefficient quantifying the polymorphism of ISSR patterns, (3) and (4) between free energy DeltaG degrees of anchor sequence of primer and the number of total, and polymorphic bands in ISSR patterns, respectively. Methodological recommendations for effective ISSR primer design were inferred based on revealed correlations. In particular, free energy of ISSR primer sequence is recommended to be DeltaG degrees > 160 kJ/mol of interaction and free energy of flanking anchor sequence in primer to be around DeltaG degrees = 28 kJ/mol of interaction to produce ISSR patterns displaying maximum polymorphism of flax germplasm.
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