1993 年 58 巻 4 号 p. 477-482
The karyotype of the “primitive” unicellular red alga Cyanidioschyzon merolae was determined. This cytogenetic study was limited by the absence of mitotic chromosomes which were visible by light microscopy. Therefore, the electrophoretic karyotype of C. merolae was obtained using a pulsed field gel electrophoresis system which uses contour-clamped homogeneous electric fields. The karyotype of C. merolae consisted of 15 chromosomes which ranged in size from 420 kbp to 2050 kbp. The predicted genome size was 12.2 Mbp. This value is larger than the genome size of C. merolae which was previously estimated using a VIM system.