Storey 1969 reported that the only bona fide varietes of papaya in existence were "solo" and "bush" of Hawaii and "Hortus Glod" of south Africa Since then, however. numerous distinct, truue-breeding varieties have been developed from many parts of the world. Many are from systematic breeding programmes while others are from judicious selection efforts by growers. Recently, biotechnology tools have been used to develop transgenic varieties. Papaya varictis can be self-pollinated (in which case they are purelines) or cross-pollinated. In general. gynodioecious varieties (having bermaphrodite and female trees) are self or cross-pollinated. While the dioecious varieties (having mate andfemale) are enforced cross-pollinators.