ArticlePlants (Basel, Switzerland)2026
SNP-Based KASP Markers Reveal Genetic Diversity and Population Structure Among African Sorghum Breeding Lines and Hybrids.
Article in Plants (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sorghum is a strategic food-security and livestock-feed crop in Africa, and molecular characterization of its germplasm underpins genetic diversity assessment and hybrid parent selection. This study evaluated 106 sorghum accessions (23 A-lines, 28 B-lines, 32 R-lines, and 23 hybrids) from ICRISAT and Seed Co gene banks using 79 single nucleotide polymorphism (SNP)-based Kompetitive Allele-Specific PCR (KASP) markers. Genetic diversity, population structure, cluster analysis, and analysis of molecular variance (AMOVA) were assessed to support heterotic grouping. Gene diversity ranged from 0.23 in R-lines to 0.32 in hybrids, and polymorphic information content from 0.19 to 0.26, indicating moderate marker discriminatory power. Population structure analysis identified an optimum of K = 3: Cluster 1 comprised paired A- and B-lines forming a putative maintainer pool, Cluster 2 was dominated by R-lines forming a divergent restorer pool, and Cluster 3 formed a second seed-parent subgroup. AMOVA confirmed highly significant differentiation (ΦST = 0.55;
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