Analysis of seed phorbol-ester and curcin content together with genetic diversity in multiple provenances of Jatropha curcas L. from Madagascar and Mexico

► No differences in curcin concentration on toxic and edible seeds. ► Curcin located mainly within the endosperm. ► Phorbol-esters absent in edible seeds. ► Phorbol-esters present at highest concentration in tegmen of toxic seeds. ► Higher genetic diversity found in Mexico-edible seeds form a single cluster.