2026-05-01T10:31:59Z https://meral.edu.mm/oai

oai:meral.edu.mm:recid/239 2022-03-24T23:13:26Z 1582963567848:1582969313627 user-yau

Analysis of Population Structure Revealed Apparent Genetic Disturbance in Korea Cymbidium Collection Moe Kyaw Thu Yong-Jin Park The Oriental genus Cymbidium contains some of the most important and popular species of ornamental orchids in Korea. Genetic characterization of Cymbidium is vital for its conservation and management, as well as for understanding the genetic relationships among accessions. Among 100 tested accessions, 226 alleles were detected with an average of 16.1 alleles per simple sequence repeat locus; the number of alleles ranged from 28 for the KNU-CC-32 locus to 7 for KNU-CC-25. The allele size ranged from 103 to 380 bp. Thirteen loci were deviated from Hardy–Weinberg equilibrium, and showed highly significant linkage disequilibrium (P < 0.01). These results indicate that influencing disturbance in the Cymbidium population, such as natural selection and/or human intervention (i.e., plant breeding), are taking place among the species in Korea. The values for heterozygosity ranged from 0.000 to 0.969, with a mean value of 0.402. The average gene diversity and polymorphism information content values were 0.679 and 0.656, respectively, and ranged from 0.223 (KNU-CC-52) to 0.936 (KNU-CC-32) and from 0.219 (KNU-CC-52) to 0.933 (KNU-CC-32), respectively. All Cymbidium accessions were put into three main groups, and no evidence of mixed population ancestry was observed among the three populations identified. Cymbidium sinensis is not as well distributed and abundant as C. goeringii in Korea. Cymbidium goeringii is endemic in Korea. The genetic diversity in Cymbidium is not related to geographical area, which indicates that the species are randomly distributed in Korea. Our finding helps explain the genetic relationships and the population structure of Cymbidium species in Korea. 2012 http://hdl.handle.net/20.500.12678/0000000239 https://meral.edu.mm/records/239