Article

The investigation was based on geographic distribution of haplotypes of oak chloroplast DNA (et DNA) on species trom Quercus sensu stricto group with particular stress on common oak (Q. robur L.) in Croatia. Study ofthe Croatian populations was a part ofwide European investigation in frame of FAIR OAK project. In Croatia, five haplotypes (2, 5, 6, 7, 17) of et DNA were found. Our results showed that ali oak species from Quercus sensu stricto group shared the same haplotypes which could be a consequence of the hybridisation events that have occured more frequent in tbe past than today.