Ci. Castano et al., INCOMPATIBILITY REACTIONS AND GENOTYPIC IDENTITY STATUS OF 5 COMMERCIAL CHICORY (CICHORIUM-INTYBUS L.) HYBRIDS, Scientia horticulturae, 72(1), 1997, pp. 1-9
Incompatibility reactions of chicory plants cv. Flash, cv. Carolus, cv
. Pax, cv, Focus and cv. Sigma were determined. Different levels of in
compatibility were found, The cv. Carolus was highly self-incompatible
, cv. Flash and cv, Pax could be self-compatible or self-incompatible
and the cv. Sigma and cv. Focus are self-compatible. All the tested cu
ltivars were intra-compatible (pollinations within the same cultivar)
and cross-compatible among them. There was difference in percentage of
viable seeds when cultivars were self-pollinated and intra-pollinated
. This difference in percentages of viable seeds can be used as a nume
rical criterion to determine genotypic identity of a cultivar. The hig
her this difference value, the less uniform the behaviour of the culti
vars in the field and during hydroponic forcing for production of the
chicory head was observed. The results led to the conclusion that some
of the commercial cultivars are not genotypic identical which has unf
avorable implications in Belgian endive production and commercializati
on. There was equal reaction to incompatibility in any sense of crossi
ng (plants used as females compared with the result when plants were u
sed as males in cross-pollinations). (C) 1997 Elsevier Science B.V.