Fig. 2From: Genetic differentiation of grain, fodder and pod vegetable type cowpeas (Vigna unguiculata L.) identified through single nucleotide polymorphisms from genotyping-by-sequencingPopulation structure analysis for 130 cowpea accessions. A Plot of the ΔK value with the number of subpopulations (K) from 2 to 9 based on the Evanno test. B Distruct plot with each accession represented by a vertical line, and cluster assignments indicated by colorBack to article page