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A new chromosome fluorescence banding technique combining DAPI staining with image analysis in plants.

Abstract：

:In this study, a new chromosome fluorescence banding technique was developed in plants. The technique combined 4',6-diamidino-2-phenylindole (DAPI) staining with software analysis including three-dimensional imaging after deconvolution. Clear multiple and adjacent DAPI bands like G-bands were obtained by this technique in the tested species including Hordeum vulgare L., Oryza officinalis, Wall & Watt, Triticum aestivum L., Lilium brownii, Brown, and Vicia faba L. During mitotic metaphase, the numbers of bands for the haploid genomes of these species were about 185, 141, 309, 456 and 194, respectively. Reproducibility analysis demonstrated that banding patterns within a species were stable at the same mitotic stage and they could be used for identifying specific chromosomes and chromosome regions. The band number fluctuated: the earlier the mitotic stage, the greater the number of bands. The technique enables genes to be mapped onto specific band regions of the chromosomes by only one fluorescence in situ hybridisation (FISH) step with no chemical banding treatments. In this study, the 45S and 5S rDNAs of some tested species were located on specific band regions of specific chromosomes and they were all positioned at the interbands with the new technique. Because no chemical banding treatment was used, the banding patterns displayed by the technique should reflect the natural conformational features of chromatin. Thus it could be expected that this technique should be suitable for all eukaryotes and would have widespread utility in chromosomal structure analysis and physical mapping of genes.

journal_name

Chromosoma

journal_title

Chromosoma

authors

Liu JY,She CW,Hu ZL,Xiong ZY,Liu LH,Song YC

doi

10.1007/s00412-004-0289-1

subject

Has Abstract

pub_date

2004-08-01 00:00:00

pages

16-21

issue

1

eissn

0009-5915

issn

1432-0886

journal_volume

113

pub_type

杂志文章

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