韩国稀有种矮冠杜鹃花染色体数目和基因组大小的研究

IF 0.8 Q4 PLANT SCIENCES KOREAN JOURNAL OF PLANT TAXONOMY Pub Date : 2022-06-30 DOI:10.11110/kjpt.2022.52.2.102
Bokyung Choi, Hyeonjin Kim, Hye-Joo Byun, Ge Gang, Yong-Hyeon Lee, Hyeon-Ho Myeong, S. So, Tae‐Soo Jang
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引用次数: 1

摘要

韩国红杜鹃花(kerdodendron keiskei vara . hypoglaucum)是最近在朝鲜半岛南部岛屿报道的一种不间断分布的植物。虽然染色体数目和倍性变异是被子植物的重要性状,但由于其染色体的小尺寸,对杜鹃花细胞学特征的了解一直受到阻碍。本文首次报道了矮青光眼猕猴桃的染色体数目、核型结构和基因组大小。所调查植物的染色体数为2n = 26,基染色体数为x = 13,是杜鹃花中常见的基染色体数之一。keiskei var. hypoglaucum的核型由长度相近的常着丝和亚常着丝染色体组成,长度在1.39 ~ 2.40 μm之间。所有材料的DNA 1c值都很小,范围在0.63 ~ 0.65 pg之间,进一步支持了杜鹃花基因组大小的稳定性。这些全面的细胞学结果为详细的分子、细胞遗传学和系统基因组分析提供了一个框架,可以用来解释杜鹃花物种多样化速度缓慢的原因。
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A study of the chromosome number and genome size of the rare species Rhododendron keiskei var. hypoglaucum in Korea
Rhododendron keiskei var. hypoglaucum (Ericaceae) was recently reported in Korea, with a disjunct distribution on the southern islands of the Korean Peninsula. Although chromosome numbers and ploidy variations are important traits in angiosperms, gaining a clear understanding the cytological features of Rhododendron has been hampered by the small size of its chromosomes. We herein report the chromosome number, karyotype structure, and genome size of R. keiskei var. hypoglaucum for the first time. The chromosome number of the investigated plants was 2n = 26 with x = 13 as the base chromosome number, which is the one of the frequently encountered base chromosome numbers in Rhododendron. The karyotype of R. keiskei var. hypoglaucum is composed of metacentric and submetacentric chromosomes similar in length, which ranged from 1.39 to 2.40 μm. The DNA 1C-value in all examined accessions was small, ranging from 0.63 to 0.65 pg, further supporting the stable genome size in Rhododendron. These comprehensive cytological results provide a framework for detailed molecular, cytogenetic, and phylogenomic analyses that can be used to interpret the slow species diversification rate in Rhododendron.
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来源期刊
KOREAN JOURNAL OF PLANT TAXONOMY
KOREAN JOURNAL OF PLANT TAXONOMY Agricultural and Biological Sciences-Plant Science
CiteScore
1.50
自引率
40.00%
发文量
23
期刊最新文献
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