Abstract
Four rare species of genus Alocasia in Thailand were cytologically studied. The somatic chromosome number and karyotypes of four rare species are 2n=28=12m+12sm+4st (A. heterophylla), 2n=28=16m+8sm+4st (A. hypoleuca), 2n=56=34m+12sm+10st (A. princeps ‘Purple Cloak’) and 2n=26=12m+10sm+4st (A. nebula), respectively. The somatic chromosome numbers of all species were reported for the first time except A. princeps ‘Purple Cloak.’ The NF and karyotype of all species were reported for the first time. The cytogenetic data in this study can be used for the identification of each species.
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