VARIATIONS IN THE MINERAL CONCENTRATION AMONG DIFFERENT POTATO (SOLANUM TUBEROSUM L.) ACCESSIONS
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Keywords:Potato, germplasm diversity, minerals, biofortification, iron, zinc
A collection of one hundred tetraploid potato accessions was evaluated in relation to the concentrations
of nine minerals (Fe, Zn, Cu, Mn, Ca, Mg, S, P and K) required for human nutrition. Large amount of variability for
selected minerals was observed in the germplasm. Significant positive correlations (P < 0.001) were found between Fe-
Cu (r2=0.41), Zn-Cu (r2=0.46), Mn-K (r2=0.51) and Ca-Mg (r2=0.40), whereas significant negative correlation (P < 0.001) was
observed between P-K (r2= -0.36). The first two principle components accounted 42.72% of the total observed variations.
Unweighted pair group method with arithmetic mean (UPGMA) based clustering distinguished the potato accessions into
different groups based on Gower distances. These results will be useful for developing biofortified potato varieties using
traditional and modern breeding methods. Moreover, variations in the mineral contents within the potato germplasm
could also be used for the identification of molecular markers associated with mineral concentrations through genome
wide association studies (GWAS).
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