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http://dx.doi.org/10.7235/hort.2012.12103

FISH Karyotype Analysis of Seven Rose Cultivars  

Hwang, Yoon-Jung (Department of Horticultural Science, Kyungpook National University)
Han, Tae Ho (Division of Plant Biotechnology, College of Agriculture and Life Science, Chonnam National University)
Martin, Cathie (Department of Metabolic Biology, John Innes Centre)
Lim, Ki-Byung (Department of Horticultural Science, Kyungpook National University)
Publication Information
Horticultural Science & Technology / v.30, no.5, 2012 , pp. 568-572 More about this Journal
Abstract
Determination of ploidy level for the mother plant is prerequisite for effective breeding. The study was carried out to determine the ploidy level in 7 different plant materials by FISH karyotype analysis. Among the seven plant varieties analyzed, all exhibit tetraploid (2n = 4x = 28) based on the results observed in chromosome analysis. Four signals of 45S rDNAs were detected on the terminal region of the short arm of chromosome 7. The length of somatic metaphase chromosomes ranges from 1.67 to $2.67{\mu}m$ in 'Alexandra', 1.40 to $2.04{\mu}m$ in 'Freud', 1.64 to 2.24 in 'Little Silver', 1.69 to $2.26{\mu}m$ in 'Teresa', 1.70 to $2.65{\mu}m$ in 'Tineke', 1.35 to $2.08{\mu}m$ in 'Vital', 1.39 to $2.04{\mu}m$ in 'Yellow Mimi'. Total length of the chromosome ranges from $11.23{\mu}m$ in 'Freud' as minimum to $15.05{\mu}m$ in 'Alexandra' as maximum. The karyotypes were composed of metacentric, submetacentric, and subtelocentric chromosome but there is no subtelocentric chromosome.
Keywords
breeding; chromosome; cultivated rose; ploidy level; rDNA;
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