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Mol. Cells 2002; 13(3): 413-418

Published online January 1, 1970

© The Korean Society for Molecular and Cellular Biology

Karyotype Analysis of a Korean Cucumber Cultivar (Cucumis sativus L. cv. Winter Long) Using C-banding and Bicolor Fluorescence in situ Hybridization

Dal-Hoe Koo, Yoonkang Hur, Dong-Chun Jin, Jae-Wook Bang

Abstract

An intensive karyotype analysis of a Korean cucumber cultivar (Cucumis sativus L. cv. Winter Long) was car-ried out with three different methods. These included Feulgen staining, Giemsa C-banding, and fluorescence in situ hybridization (FISH). The mitotic chromosomes of the cucumber (2n = 2x = 14) were characterized, based on the length and arm ratio values. A C-banding analysis showed dark stains on the centromeric, te-lomeric, and intercalary regions of the chromosomes, except that chromosome 2 had a heavy staining in the long arm. Bicolor FISH, using 45S and 5S rDNA probes, provided additional information to identify cucumber chromosomes. The signals for 45S rDNA were detected on the pericentromeric regions of chro-mosomes 1, 2, and 4. The signals for 5S rDNA were on the short arm of chromosome 5. Similar band patterns (as the C-banding) were observed when the chromo-somes were counter-stained with 4?6-diamidino-2-phenyoindole (DAPI). The data implied that the karyotype of the Korean cucumber cultivar is peculiar and different from previous reports.

Keywords C-banding, Bicolor FISH, Karyo, Cucumis sativus L.

Article

Research Article

Mol. Cells 2002; 13(3): 413-418

Published online June 30, 2002

Copyright © The Korean Society for Molecular and Cellular Biology.

Karyotype Analysis of a Korean Cucumber Cultivar (Cucumis sativus L. cv. Winter Long) Using C-banding and Bicolor Fluorescence in situ Hybridization

Dal-Hoe Koo, Yoonkang Hur, Dong-Chun Jin, Jae-Wook Bang

Abstract

An intensive karyotype analysis of a Korean cucumber cultivar (Cucumis sativus L. cv. Winter Long) was car-ried out with three different methods. These included Feulgen staining, Giemsa C-banding, and fluorescence in situ hybridization (FISH). The mitotic chromosomes of the cucumber (2n = 2x = 14) were characterized, based on the length and arm ratio values. A C-banding analysis showed dark stains on the centromeric, te-lomeric, and intercalary regions of the chromosomes, except that chromosome 2 had a heavy staining in the long arm. Bicolor FISH, using 45S and 5S rDNA probes, provided additional information to identify cucumber chromosomes. The signals for 45S rDNA were detected on the pericentromeric regions of chro-mosomes 1, 2, and 4. The signals for 5S rDNA were on the short arm of chromosome 5. Similar band patterns (as the C-banding) were observed when the chromo-somes were counter-stained with 4?6-diamidino-2-phenyoindole (DAPI). The data implied that the karyotype of the Korean cucumber cultivar is peculiar and different from previous reports.

Keywords: C-banding, Bicolor FISH, Karyo, Cucumis sativus L.

Mol. Cells
Sep 30, 2023 Vol.46 No.9, pp. 527~572
COVER PICTURE
Chronic obstructive pulmonary disease (COPD) is marked by airspace enlargement (emphysema) and small airway fibrosis, leading to airflow obstruction and eventual respiratory failure. Shown is a microphotograph of hematoxylin and eosin (H&E)-stained histological sections of the enlarged alveoli as an indicator of emphysema. Piao et al. (pp. 558-572) demonstrate that recombinant human hyaluronan and proteoglycan link protein 1 (rhHAPLN1) significantly reduces the extended airspaces of the emphysematous alveoli by increasing the levels of TGF-β receptor I and SIRT1/6, as a previously unrecognized mechanism in human alveolar epithelial cells, and consequently mitigates COPD.

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