According to Dr. Frank Martin:
Roots and Tubers
(1) sweet potatoes--the variety 'Gem' (orange-fleshed) and some white-fleshed types,
(2) yams--Dioscorea alata and D. esculenta, selected varieties,
(3) cassava--some true seed to start my own,
(4) Queensland arrowroot (Canna edulis), very easy to grow and productive.
(2) okra, for edible seed and well as green fruit,
(3) wax gourd (Benincasa hispida) for edible seed as well as squash-like fruit.
(1) Catjang cowpeas (climbing, disease resistant forms),
(2) winged bean,
(3) Dolichos lablab beans,
(4) asparagus beans.
(2) sunset hibiscus,
(3) Tahitian taro (Xanthosoma brasiliensis),
(4) Tropical or Indian lettuce (Lactuca indica).
(1) tropical pumpkin,
(3) small-fruited, indeterminate tomatoes,
(4) hot pepper,
(5) ensalada pepper, selected for its edible leaves.
(3) limes (West Indian, from seed),
(6) mangoes (from seed, turpentine type but selected).
What Seed Would You Take to an Uninhabited Tropical Island? ECHO farm in Ft Myers