Abstract: The complement of triploid Torreya grandis was stained with the conventional and C-banding methods. The fundamental karyotype of each monoploidy set is similar to diploid plant indicating their autotriploid nature. The only C-band which located on the positions of secondary constrictions of the three homologous chromosomes showed different size. Therefore, the complement of triploid Torreya grandis may be arisen as a result of fusion between the female diploid and the male haploid.

Key words: Torreya grandis, Complement, C-banding