Abstract
Summary: In gymnosperms chromosomes were analyzed by fluorescence banding using DAPI and chromomycin As and in situ hybridization with some probes in addition to conventional cytogenetic technique to be revealed as follows; Several valuable information on chromosomes in Chinese conifers such as comparative FISH analysis in Picea koreiensis and P. crassifolia. In Larix species examined were divided into six groups by fluorescence banding pattern and the DNA sequence localizing at the proximal DAPI-band was analyzed to be a tandem repeated AT-rich sequence and the sequence was presented in all Larix species examined. Sex chromosomes were discovered in Podocarpus macrophyllus and Cycas revoluta. In Pinus densiflora and P. thunbergii the DNA sequences localized at the fluorescent bands were revealed. The multi color FISH using four DNA probes allows to be identified each chromosome in each species and homoeologous chromosomes between these species.