Heterochromatic banding patterns in Allium
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The karyotypes of nine Allium species of the paniculatum group have been analysed with fluorochromes and C-banding techniques. All the species possess reduced as well as enhanced fluorescence bands which are also differentiated by C-banding and which correspond to constitutive heterochromatin. Heterochromatic segments are located in distal and intercalary positions leaving sizeable procentric regions devoid of bands. These features are indicative of a close relationship between the species of this group. However, the proportion of heterochromatin as a percentage of total chromosome length varies from about 30% to 10–15%.
KeywordsDevelopmental Biology Banding Pattern Fluorescence Band Chromosome Length Procentric Region
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