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Comparative studies on karyotypes and giemsa c banding patterns of 8 subspecies type in maize



Comparative studies on karyotypes and giemsa c banding patterns of 8 subspecies type in maize



Acta Genetica Sinica 17(2): 86-93



In this paper, the karyotypes and Giemsa C-banding patterns of 8 subspecies, 2 subtypes and 2 hybrid cultivars in maize have been first reported. The chromosome number of all experimental materials is 2n=20. They are composed of metacentric and submetacentric chromosomes, and the satellites are in the short arms of 6th chromosomes, but different samples are not the same in their satellite size. There appear st and t bands in the Giemsa C-banding patterns in all samples, and NOR or/and SAT bands in short arms of 6th chromosomes. The total C-band numbers varied from 6 to 18, and percent of total length of C-bands from 5.65 to 11.40 in all samples. These are differences in number, length and distribution of C-bands among different experimental materials. The total number of C-bands and metacentric chromosomes in karyotypes, as a rule, is more rarely cultivated or primitive types than in commonly cultivated one. In addition, that the variation and evolution about karyotypes and C-bands are discussed briefly.

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Accession: 007136401

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