Chromosome counts and karyotype analysis of nine taxa in Sorbus subgenera Aria and Micromeles (Rosaceae) from China

IF 2.1 4区生物学 Q2 Agricultural and Biological Sciences

Caryologia Pub Date : 2022-07-07 DOI:10.36253/caryologia-1387

Yuming Qian, Kailin Zhu, C.-Y. Tang, Zhixin Qiu, Xin Chen

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引用次数: 0

Abstract

Chromosome numbers of nine taxa in Sorbus subgenera Aria (Pers.) Host and Micromeles Decne. were determined. All are diploid with 2n = 2x = 34. Eight out of them: S. alnifolia (Siebold and Zucc.) K. Koch var. angulata S.B. Liang Rehd., S. alnifolia (Siebold and Zucc.) K. Koch var. lobulata (C.K. Schneid.) Rehd., S. dunnii Rehd., S. folgneri (C.K. Schneid.) Rehd., S. hemsleyi (C.K. Schneid.) Rehd., S. lushanensis X. Chen & J. Qiu, S. ochracea (Hand.-Mazz.) J.E. Vidal and S. yuana Spongberg, which are endemic to China, were reported for the first time. One remaining Asian native S. alnifolia var. alnifolia (Siebold and Zucc.) K. Koch, 2n = 34 was confirmed here. The chromosomes size and the total haploid chromosome length varied from 0.91 µm to 3.51 µm and 23.43 μm to 50.04 μm respectively. A predominance of metacentric chromosomes were perceived. Satellites were observed only in taxa of subgenera Micromeles. Nine taxa were classified as 1A, 2A and 2B according to the Stebbins classification. S. yuana in subgenus Aria presents the most symmetrical karyotype according to all the 11 quantitative indices analyzed, while S. dunnii and S. ochracea in Micromeles present the most asymmetrical karyotypes according to different indices.

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中国蔷薇科花楸亚属和花楸亚属9个分类群的染色体计数和核型分析

Sorbus Aria亚属9个分类群的染色体数目宿主和微体衰退。测定。都是二倍体，2n = 2x = 34。其中8种:金叶花(S. alnifolia，西博尔德和祖克)梁瑞德。，金合花(西博尔德和祖克)柯氏叶状变异(C.K.施耐德)Rehd。邓尼·里德。(C.K.施耐德)Rehd。S.赫姆斯利(C.K.施耐德)Rehd。陈晓霞，邱建军，S. ochracea (Hand.-Mazz.)中国特有的J.E. Vidal和S. yuana海绵虫为首次报道。仅存的一种亚洲本地alnifolia变种alnifolia (Siebold and Zucc.)K. Koch, 2n = 34在这里得到了证实。染色体大小为0.91 ~ 3.51 μm，单倍体染色体总长度为23.43 ~ 50.04 μm。我们观察到偏心染色体的优势。卫星只在Micromeles亚属的分类群中观察到。根据Stebbins分类将9个类群划分为1A、2A和2B。在11个定量指标上，Aria亚属的S. yuana表现出最对称的核型，而S. dunnii和S. ochracea在Micromeles中表现出最不对称的核型。

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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.