“…D. cayennensis is reported to have higher carotenoid content (Bhattacharjee et al, 2011;Gedil & Sartie, 2010;Lebot, 2008), whilst D. rotundata is preferred by farmers and consumers. A few studies have showed that β-carotene is the major carotenoid of D. cayennensis (Ukom, Ojimelukwe, & Alamu, 2016;Ukom, Ojimelukwe, Ezeama, Ortiz, & Aragon, 2014), yet, other reports show β-carotene is of minor presence in the species (Champagne et al, 2010) and that the major carotenoids are xanthophyll esters (Martin & Ruberte, 1975). Recent work has shown varieties of D. dumetorum with estimated vitamin A activity at levels similar to that of enhanced cassava genotypes (Ferede, Maziya-Dixon, Alamu, & Asiedu, 2010).…”