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High chromosomal variability of mandarins (Citrus spp.) revealed by CMA banding

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Abstract

Fluorochrome staining with chromomycin A3(CMA) was used to characterize and compare the CMA banding patterns of chromosomes in 17 accessions of mandarins (Citrus spp.). All accessions had 2n = 18 chromosomes. These chromosomes were classified into six types based on the number and position of CMA positive bands; A: two telomeric and one proximal band, B: one telomeric and one proximal band, C: two telomeric bands, D: one telomeric band, E: without bands, F: one proximal band. Each accession possessed two to five types of chromosomes, and showed unique CMA banding patterns. Type D and E chromosomes were predominant in all accessions. Their numbers were generally higher in Chinese and Indian mandarins. Type F chromosome was present only in some mandarins originating in Japan, which could thus be distinguished from mandarins originating in other areas. This study is the first report of type F chromosome in citrus. The Vietnamese mandarins we studied were the only one shaving type A, B, C, D and E chromosomes.

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Authors and Affiliations

  1. Faculty of Agriculture, Kagoshima University, 1-21-24, Korimoto, Kagoshima, 890-0065, Japan

    Masashi Yamamoto & Shigeto Tominaga

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  1. Masashi Yamamoto
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  2. Shigeto Tominaga
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Yamamoto, M., Tominaga, S. High chromosomal variability of mandarins (Citrus spp.) revealed by CMA banding. Euphytica 129, 267–274 (2003). https://doi.org/10.1023/A:1022284908424

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