Oryzalin application times and doses on tetraplodization in citron (Citrullus lanatus var. citroides)

The interest in tetraploid plant production recently has gained importance in vegetable grafting especially in cucurbits.
In this study oryzalin doses of 0 µM (Control), 30, 60, 90 and 120 µM were applied to the shoot tips of Citron (Citrullus lanatus var. citroides) genotype ‘PI 296341’ at 24, 48 and 72 h to determine the obtention of tetraploids from citron.
The experiment was conducted at the experimental field of the Department of Horticulture, Cukurova University in Turkey with the objective of determining the best oryzalin application time and dose for obtaining tetraploid plants.
No tetraploid plant was obtained in all application doses at 48 h.
Oryzalin doses of 30, 60 and 120 µM resulted in having 25% tetraploid plants at each for 24 h.
After 72 h of plants treatment with oryzalin, 30 and 120 µM doses resulted in 25% and 90 µM dose resulted in 50% tetraploids.
Results of present study clearly indicate that, citron responds well in tetraploid induction at 90 and 120 µM oryzalin concentrations when applied for 72 h.

XXX International Horticultural Congress IHC2018: II International Symposium on Plant Breeding in Horticulture

M.D. Kombo, N. Sari, I. Solmaz, M. Namli

chromosome doubling, chloroplasts, guard cells, shoot tip

https://doi.org/10.17660/ActaHortic.2020.1282.59