Karyotype diversity in four Terminalia L. species and its taxonomic implications

Q4 Agricultural and Biological Sciences

Feddes Repertorium Pub Date : 2023-07-13 DOI:10.1002/fedr.202200054

Suma Akter, Chandan Kumar Dash, Syeda Sharmeen Sultana

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引用次数: 0

Abstract

Four Terminalia L. species namely, T. arjuna (Roxb.) Wight and Arn., T. bellirica (Gaertn.) Roxb., T. chebula Retz. and T. catappa L. were studied to evaluate the chromosomal relationship corresponding with their taxonomic characters. Analysis of mitotic metaphases showed that the somatic chromosome numbers and the centromeric formulas of these species were 2n = 24 (16m + 8sm) for T. arjuna, 2n = 48 (36m + 12sm) for T. bellirica, 2n = 48 (46m + 2sm) for T. chebula and 2n = 24 (24m) for T. catappa. Two pairs of satellites were found in T. bellirica and T. catappa. Based on different karyological data, T. chebula was positioned in 1A, T. arjuna and T. catappa in 1B and T. bellirica in 2B. Based on comparative karyomorphological data, T. bellirica and T. arjuna presented more advanced features in comparison with T. chebula and T. catappa, which also correlated with the taxonomic characters in respect of the evolutionary point of view. Therefore, the present investigation effectively evaluated chromosomal relationships with morphological implications that conferred upon evolutionary changes among these four Terminalia species.

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四种龙葵的核型多样性及其分类意义

四种终端植物，即: arjuna (Roxb.)怀特和阿恩。， T. bellirica (Gaertn.)Roxb。， T. chebula Retz。和 catappa L.的染色体关系与它们的分类特征相对应。有丝分裂中期分析表明，这些物种的体细胞染色体数目和着丝粒公式分别为: arjuna 2n = 24 (16m + 8sm)， bellirica 2n = 48 (36m + 12sm)， chebula 2n = 48 (46m + 2sm)， catappa 2n = 24 (24m)。在T. bellirica和T. catappa中发现了两对卫星。根据不同的核学资料， chebula位于1A， arjuna和 catappa位于1B， bellirica位于2B。对比核形态资料， bellirica和 arjuna较 chebula和 catappa具有更高级的特征，这也与进化观点上的分类特征相关。因此，本研究有效地评估了染色体关系与形态学意义，赋予这四个终末种之间的进化变化。

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来源期刊

Feddes Repertorium Agricultural and Biological Sciences-Plant Science

CiteScore

1.20

自引率

0.00%

发文量

期刊介绍： Feddes Repertorium - Journal of Botanical Taxonomy and Geobotany is one of the world"s leading publications in theory and practice. Original research papers and reviews cover all groups of the plant world, including extant and fossil. Theory and principles of taxonomy, nomenclature, techniques and methodology, on evolution and phylogeny and descriptions of new taxa are considered as well. The reader will also find information on the history of flora and vegetation. All papers are internationally refereed by experts in their respective fields.