Use of Flowering Beginning and End To Study Tomato Earliness

The period from seedling to end ripening of the first cluster, was divided into a series of shorter periods, made up parting from flowering beginning and end dates. The periods made up were: seeding-flowering beginning, flowering beginning-flowering end and flowering end-ripening end. The periods Were studied on a complete diallel Ft, with eight tomato varieties very different in earliness. The first period inheritance mode, is of partial dominance, whilst regarding the other two it is of complete dominance. Dominance is always towards greater earliness.

Intergration of adjacent periods to from longer ones (seeding-flowering end and flowering beginning-ripening end), is not very advisable. The parents, Atom, Fortuna and Floradel, possess good g.c.a. effects for earliness over the first two periods, whilst Oxheart, Valenciano and Muchamiel offer it over the third period.