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Finger millet (Eleusine coracana) is one of important crops, and its grains contain an exceptionally high content of calcium. In order to investigate the molecular mechanism by which it orchestrate the accumulation of Ca²⁺ during grain filling, some candidate genes encoding calcium transporters [calcium exchangers (CAX1, CAX3)] and sensors [calcineurin-B like (CBL4 and 10)], a CBL-interacting protein kinase (CIPK24), and calmodulin (CaM) were identified using transcriptomics and differential expression analysis in two genotypes of finger millet differing in grain calcium content. These transporters and sensors are highly expressed in leaves and developing spikes of the genotype with a high grain Ca²⁺ indicating their potential role in Ca²⁺ accumulation. Calcium transporters, mainly CAXs, pump Ca²⁺ inside the cell through plasmalemma and tonoplast, and their activities are regulated by CaM …