Complex sentence: All modern plantain cultivars have three sets of chromosomes (i.e. they are triploid) and are mainly hybrids derived from the cross of two wild species, "Musa acuminata" and "Musa balbisiana".
Split into simpler sentences: All modern plantain cultivars have three sets of chromosomes (i.e. they are triploid). Many are hybrids derived from the cross of two wild species, "Musa acuminata" and "Musa balbisiana".