Abstract
F1 hybrids (24 chromosomes) were obtained through embryo culture from 30 -day fruits between pistillate plant of Pearson, typical of normal-type L. esculentum but with homozygous sp genes and staminate S. lycopersicoides, a Peruvian perennial. F1 hybrids showed low fertility but progeny were obtained by a backcross to the tomato plant Colchicine-induced amphidiploids showed much more chromosomal pairing and greater fertility.

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