| Summary: | of fruits; Long-Green, Ellips-Green, and Yellow. Chromosome characterization of the Bartek was investigated to
determine the genetic variation. The main purpose of this research was to determine the genetic characters of
Bartek including chromosome number, mitosis, cell cycle, and karyotype. Squash method was used for chromosome
preparation. The results showed that all of Bartek observed in this study have similar diploid (2n) chromosome
number = 24. According to the total number of chromosome, Bartek is closer to melon than cucumber. The mitotic
analysis exhibited that the Bartek has similar karyotype formula, 2n = 2x = 24m. Based on the R value of the
three kinds of Bartek (R < 0.27), it indicated that three kinds of Bartek were considered to be originated from
similar species and one of melon varieties (Cucumis melo L. var. Bartek).
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