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The Nuclear DNA Content and Histological Characteristics of Triploid Poplars Grown In Vitro  

Bae, Eun-Kyung (Division of Forest Biotechnology, Korea Forest Research Institute)
Lee, Hyoshin (Division of Forest Biotechnology, Korea Forest Research Institute)
Lee, Jae-Soon (Division of Forest Biotechnology, Korea Forest Research Institute)
Choi, Young-Im (Division of Forest Biotechnology, Korea Forest Research Institute)
Park, So-Young (Department of Horticultural Science, Chungbuk National University)
Publication Information
Journal of Korean Society of Forest Science / v.102, no.2, 2013 , pp. 198-203 More about this Journal
Abstract
Herein we analyzed the nuclear DNA content and the histological characteristics of the triploid of the 'Hyunsasi' (Populus alba ${\times}$ P. glandulosa $F_1$) which were developed for biomass production and molecular breeding research. The flow cytometric analysis showed that the nuclear DNA content of the 3 triploids were 1.6 times greater than those of the diploid. In terms of histological characteristics, the cross-section area of the stem of 'Line-18' was 1.6 times larger than that of the diploid. The area of pith, and cortex and phloem of the stem of 'Line-18' was also 1.6 and 2.0 times larger than that of the diploid, respectively. Moreover, the length and area of guard cell of 'Line-18' was 1.2 times larger than that of the diploid. These results helps to understand the cytological characteristics of the triploid poplar clones, and further investigations in the growth rate and wood properties of the triploids growing in the field will determine whether the triploid poplars are good candidates for molecular breeding programs and for the improvement of industrial biomass productivity.
Keywords
histological characteristics; DNA content; flow cytometry; poplar; triploid;
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