iForest - Biogeosciences and Forestry


Comparison of genetic parameters between optimal and marginal populations of oriental sweet gum on adaptive traits

Murat Alan   

iForest - Biogeosciences and Forestry, Volume 11, Issue 4, Pages 510-516 (2018)
doi: https://doi.org/10.3832/ifor2450-011
Published: Jul 18, 2018 - Copyright © 2018 SISEF

Research Articles

Collection/Special Issue: COST Action FP1202
Strengthening conservation: a key issue for adaptation of marginal/peripheral populations of forest trees to climate change in Europe (MaP-FGR)
Guest Editors: Fulvio Ducci, Kevin Donnelly

Genetic parameters of 9 oriental sweetgum (Liquidambar orientalis Mill.) populations were estimated at a common garden test. Open-pollinated seeds were collected from 16-27 families for each population. The common garden test was established in 2009 using a randomized complete block design in 25 blocks with single tree plot, with each block included 223 families. Breast height diameter, height and crown diameter were measured at the age of five. The purpose of study was to compare the genetic parameters of optimal and marginal populations and to assess the findings for genetic conservation. The study revealed significant variability in all traits evaluated. In variance components, variation among populations was three times higher than that of families. Individual heritability estimates for breast height diameter, height and crown diameter pooled across the whole dataset (marginal and optimal populations) were 0.21 ± 0.04, 0.27 ± 0.04 and 0.11 ± 0.03 and additive genetic coefficients of variation were 13.4%, 9.1% and 7.1%, respectively. Individual heritability estimates for breast height diameter, height and crown diameter in marginal and optimal populations were 0.27 ± 0.10, 0.19 ± 0.08 and 019 ± 0.08 and 0.19 ± 0.04, 0.29 ± 0.05 and 0.09 ± 0.03, respectively. Additive genetic coefficients of variation for breast height diameter, height and crown diameter were 16.7%, 8.3% and 10.8% in marginal and 12.8%, 9.1% and 6.2% in optimal populations, respectively. While breast height diameter and crown diameter were more heritable for marginal populations, height was more heritable for optimal populations. These findings are discussed in terms of genetic conservation of oriental sweet gum.


Liquidambar orientalis, Genetic Variation, Individual Heritability, Gene Conservation, Climate Change

Authors’ address

Murat Alan
Karabuk University, Faculty of Forestry, Karabuk (Turkey)

Corresponding author

Murat Alan


Alan M (2018). Comparison of genetic parameters between optimal and marginal populations of oriental sweet gum on adaptive traits. iForest 11: 510-516. - doi: 10.3832/ifor2450-011

Academic Editor

Fulvio Ducci

Paper history

Received: Apr 04, 2017
Accepted: May 15, 2018

First online: Jul 18, 2018
Publication Date: Aug 31, 2018
Publication Time: 2.13 months

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