Work

Karyotypes and chromosome evolution of polyploids of Begonia sect. Platycentrum (Begoniaceae) with chromosome numbers 2n=44, 60, and 66

Year: 2026

Type: article

Abstract: We report the first chromosome counts for four species of Begonia sect. Platycentrum, three with 2n=44 and one with 2n=66, and reinvestigated the chromosome cytology of two species of the section with chromosome numbers of 2n=44 and 2n=60, respectively. The karyotypes of these six species are reported for the first time. Based on these karyotypes, species with 2n=44 and 2n=66 are shown to be tetraploids and hexaploid with x=11, respectively, whereas B. formosana (2n=60) is hypothesized to be an amphidiploid, likely originating from hybridization between a diploid with 2n=22 (i.e., B. longifolia or B. palmata) and a tetraploid with 2n=38, which are represented by four species endemic to Taiwan.

Source: CYTOLOGIA

DOI: 10.1508/cytologia.91.33

Authors: Kuo-Fang Chung, Yoshiko Kono, Ching-I Peng, Hsun-An Yang, Li-Wei Tsai, Kazuo Oginuma

Institutions: Biodiversity Research Center, Academia Sinica, University of Kochi, Kōchi University

Language: English

Topic: Chromosomal and Genetic Variations

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: diamond

Funder: Academia Sinica

OpenAlex ID: W7140227128

FWCI: 3.676

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Cited by: 1

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