Karyotypes of some species of Castanopsis, Lithocarpus and Quercus (Fagaceae) from Khun Mae Kuang Forest in Chiang Mai province, northern Thailand

Authors

  • Ploenpit Chokchaichamnankit - Botany Department, Faculty of Sciences, Chulalongkorn University - Biology Institute, University of Iceland
  • Warawut Chulalaksananukul Botany Department, Faculty of Sciences, Chulalongkorn University
  • Chamlong Phengklai The Royal Institute of Thailand, The Academy of Sciences
  • Kesara Anamthawat-Jonsson Biology Institute, University of Iceland

Keywords:

Castanopsis, Fagaceae, karyotype, Lithocarpus, Quercus.

Abstract

Karyotypes of 18 species belonging to three genera, Castanopsis (9), Lithocarpus (5) and Quercus (4) of Fagaceae from northern Thailand were constructed. All species showed diploid (2n = 2x
= 24) chromosome numbers, with the basic number being 12.  Meiosis from anthers of two Castanopsis species confirmed the diploid status.  Metaphase chromosomes are relatively small, about 2–5 ìm in size, and all are metacentric and submetacentric chromosomes.  The arm-ratio measurement revealed
karyotypic variation among the species investigated – the chromosome complement consists of 8–12 pairs of metacentric and 0–4 pairs of submetacentric chromosomes.  This is the first report of karyotypes of Castanopsis and Lithocarpus from Thailand. The karyotypic description of the Quercus species
examined here is substantially different from that of European species.

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Author Biographies

Ploenpit Chokchaichamnankit, - Botany Department, Faculty of Sciences, Chulalongkorn University - Biology Institute, University of Iceland

-Botany Department, Faculty of Sciences, Chulalongkorn University, Phaya Thai Road, Bangkok 10330, Thailand.

- Biology Institute, University of Iceland, Askja-Sturlugata 7, Reykjavik IS-101, Iceland


Warawut Chulalaksananukul, Botany Department, Faculty of Sciences, Chulalongkorn University

Botany Department, Faculty of Sciences, Chulalongkorn University, Phaya Thai Road, Bangkok 10330, Thailand.

Chamlong Phengklai, The Royal Institute of Thailand, The Academy of Sciences

The Royal Institute of Thailand, The Academy of Sciences, Naphralan Road, Phra Nakhon, Bangkok 10200, Thailand.

Kesara Anamthawat-Jonsson, Biology Institute, University of Iceland

Biology Institute, University of Iceland, Askja-Sturlugata 7, Reykjavik IS-101, Iceland

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How to Cite

Chokchaichamnankit, P., Chulalaksananukul, W., Phengklai, C., & Anamthawat-Jonsson, K. (2014). Karyotypes of some species of Castanopsis, Lithocarpus and Quercus (Fagaceae) from Khun Mae Kuang Forest in Chiang Mai province, northern Thailand. Thai Forest Bulletin (Botany), (35), 38–44. Retrieved from https://li01.tci-thaijo.org/index.php/ThaiForestBulletin/article/view/24199

Issue

No. 35 (2007)

Section

Articles