More about Macrocalyx.
Hardin, M.
Further tests indicate that pollen and ovule sterility is associated with the large sepals of the Macrocalyx (mc) tomato.
In all mc x Normal (Mc) crosses the F1 is fruitful, most F2 Mc plants fruitful, all mc F2's unfruitful. All attempts to breed a fruitful variety of Macrocalyx have been unsuccessful. Would be very grateful for any data, or the opinion of others on this problem.