JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2014, Vol. 38 ›› Issue (增刊): 25-29.doi: 10.3969/j.issn.1000-2006.2014.S1.006

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Karyotype parameters analysis and genetic relationship discussion of Cerasus(Rosaceae)

GU Yu1,2, SHI Gangying1, LI Zhen1, WANG Xianrong1   

  1. 1. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China;
    2. China National GeneBank, Beijing Genomics Institution, Shenzhen 518083, China
  • Online:1900-01-01 Published:1900-01-01

Abstract: Cluster analysis of eighteen materials of Cerasus was made by using DPS software with a maximum distance algorithm to explore systematic structure among genera and the relationship among species based on karyotype parameters. The result indicated that: basic chromosome number of this genus was proved to be x=8, chromosome number was proved to be 2n=16, 2n=24 and 2n=32; there were four chromosome types: M, m, sm and st; satellites were common, karyotypes were confirmed to be 2A, 2B, 1B; taxa of wild species were confirmed diploid, and polyploidy phenomenon was remarkable in cultivars; C. subhirtella, C. subhirtella ‘Autumnalis’, C. yedoensis and C. serrulata stayed together, supporting the morphological C. sect. Sargentella; Diploid C. vulgaris and C. avium stayed together, supporting C. sect. Cerasus. Although C. jamasakura was morphologically similar to C. serrulata, their genetic distance was very far and the former was closer to C. campanulta. Polyploidy frequency in cultivated species was significantly higher than in wild species, showing a long genetic distance to their diploid ancestors. However, karyotype analysis and cluster analysis were difficult to explain the origin of cultivated species. Unlike morphological evidence, C. subg. Microcerasus and C. subg. Cerasus had not been apparently separated by cluster analysis.

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