Karyological studies of four species of Lady’s Slipper Orchids (Paphiopedilum) collected in the Bogor Botanical Garden, Indonesia

IF 2.1 4区生物学 Q2 Agricultural and Biological Sciences

Caryologia Pub Date : 2024-07-08 DOI:10.36253/caryologia-2232

T. N. Praptosuwiryo, R. Garvita, Elizabeth Handini, I. Fijridiyanto, J. Witono

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Abstract

Paphiopedilum is one of the most widely grown and hybridized of all orchid genera due to its distinctive flower morphology. This genus consists of 139 accepted species and is native to southern China to tropical Asia. Karyological studies on the genus Paphiopedilum have been reported by many cytologists in different countries. However, many Indonesian members of Paphiopedilum have remained comparatively limited in investigated cytologically. This study aimed to analyze karyological characters of four species of Paphiopedilum collected in the Bogor Botanical Garden, Indonesia, namely P. armeniacum, P. hirsutissimum, P. primulinum, and P. superbiens. Karyological studies were conducted by root tips squash method. The results showed that four species of Paphiopedilum have a basic chromosome number of x = 15. They are diploid with 2n=30, instead of the common diploid chromosome number of Paphiopedilum (2n = 26). Paphiopedilum hirsutissimum and P. primulinum possess 16 m + 14 sm chromosome formulae. Whereas Paphiopedilum armeniacum and P. superbiens revealed 16 m + 14 sm and 18 m + 12 sm chromosome formulae, respectively.A Robertsonian change in chromosome number generated by the fission of chromosomes would best explain the origin of the new diploid chromosome number and karyotypes of these species.

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印度尼西亚茂物植物园采集的四种瓢唇形兰花（Paphopedilum）的核果学研究

Paphiopedilum 由于其独特的花朵形态，是所有兰花属中种植和杂交最广泛的品种之一。该属有 139 个公认的种，原产于中国南部至亚洲热带地区。不同国家的许多细胞学专家都对木犀属进行过染色体研究。然而，印尼的许多 Paphiopedilum 成员在细胞学方面的研究仍相对有限。本研究旨在分析在印度尼西亚茂物植物园采集到的四种 Paphiopedilum（即 P. armeniacum、P. hirsutissimum、P. primulinum 和 P. superbiens）的核仁特征。采用根尖压扁法进行了核果学研究。结果表明，四种木槿的基本染色体数为 x = 15。它们是 2n=30 的二倍体，而不是 Paphiopedilum 常见的二倍体染色体数（2n=26）。Paphiopedilum hirsutissimum 和 P. primulinum 拥有 16 m + 14 sm 的染色体公式。染色体裂变产生的染色体数目的罗伯逊变化最能解释这些物种新的二倍体染色体数目和核型的起源。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Caryologia 生物-遗传学

CiteScore

1.60

自引率

23.80%

发文量

审稿时长

12 months

期刊介绍： Caryologia is devoted to the publication of original papers, and occasionally of reviews, about plant, animal and human karyological, cytological, cytogenetic, embryological and ultrastructural studies. Articles about the structure, the organization and the biological events relating to DNA and chromatin organization in eukaryotic cells are considered. Caryologia has a strong tradition in plant and animal cytosystematics and in cytotoxicology. Bioinformatics articles may be considered, but only if they have an emphasis on the relationship between the nucleus and cytoplasm and/or the structural organization of the eukaryotic cell.