Self-compatibility in doubled haploids and their F1 hybrids, regenerated via anther culture in self-incompatible Solanum chacoense Bitt.

Homozygous diploid plants originating from pollen of self-incompatible Solanum chacoense clone IP33 were analysed genetically. Among the tested individuals, two were self-compatible. As expected, all the regenerants were compatible, as pistillate parent, with the mother clone. However, three plants also displayed compatibility in the reciprocal crosses. Abnormal S-gene behaviour was observed when some androgenetic plants were intercrossed. In addition in the F1 hybrids between doubled haploids, the S-gene did not appear to function as expected, suggesting that some changes, possibly the generation of new S-alleles, had occurred.