Comparative Karyomorphological Study between Male and Female Plants of Some Cycas and Zamia Species

Authors

  • Nitsri Sangduen Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
  • Methanee Toahsakul Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.
  • Vipa Hongtrakul Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand.

Keywords:

Cytogenetics, sex determination, karyotype, idiogram, satellite chromosome

Abstract

This paper presents the karyotype and the idiogram of known sex plants for five species of Cycas (Cycadaceae) and seven species of Zamia (Zamiaceae). All five species of the genus Cycas had the same chromosome number (2n = 2x = 22) but their karyotype formulae varied into three groups: 10m+10sm+2st, 12m+8sm+2st and 14m+8sm. The karyotype of male and female Cycas plants could be clearly distinguished by the satellite chromosomes. All seven species of the genus Zamia varied in both chromosome numbers (2n = 2x = 16 up to 2n = 2x = 24) and karyotype formulae. It was difficult to differentiate between the male and female plants of the Zamia spp. by karyotyping because of the lack of satellite chromosomes in both sexes.

Downloads

Published

2009-09-30

How to Cite

Nitsri Sangduen, Methanee Toahsakul, and Vipa Hongtrakul. 2009. “Comparative Karyomorphological Study Between Male and Female Plants of Some Cycas and Zamia Species”. Agriculture and Natural Resources 43 (3). Bangkok, Thailand:476-85. https://li01.tci-thaijo.org/index.php/anres/article/view/244693.

Issue

Vol. 43 No. 3 (2009): July-September

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.