Sugiyama S, Yoshino T, Hirose T, Ohtani T. Karyotyping of barley chromosomes by a new fluorescence banding technique combined with scanning probe microscopy.
SCANNING 2012;
34:186-190. [PMID:
22058025 DOI:
10.1002/sca.20287]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2011] [Accepted: 08/14/2011] [Indexed: 05/31/2023]
Abstract
Fluorescence banding has been used to classify chromosomes, except those of barley. Four of the seven barley chromosomes are indistinguishable by length or arm ratio. C-banding has been used for classification; however, it requires a long aging period. Here, we describe a new fluorescence banding method for barley. The chromosomes are treated with warm acetate followed by staining with a fluorescent dye, YOYO-1. Using this method, all seven barley chromosomes can be clearly distinguished. Atomic force microscopy and scanning near-field microscopy analyses revealed that the surfaces of the banded chromosomes were flat, indicating that the fluorescence intensity reflected the internal DNA density or condensation of chromatin.
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