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Genetic parameters for growth and Quambalaria shoot blight resistance in Corymbia citriodora subsp. variegata

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Abstract

In order to provide genetic parameters of growth and Quambalaria shoot blight (QSB) resistance in Corymbia citriodora subsp. variegata (CCV), two trials of 91 open-pollinated families from 10 provenances were established in southern China. Effects of variance components of provenance and/or family within provenance were significant (p ≤ 0.05, 0.01, or 0.001) for most growth traits (tree height at seven, 12, 21, 29, and 46 months as well as breast-high diameter and single-tree volume at 21, 29, and 46 months) and QSB resistance (at 7 months) at each trial and across trials. Narrow-sense heritability estimates ranged from 0.04 to 0.46 in growth and 0.01 to 0.27 in QSB resistance, indicating generally low to moderate levels of additive genetic control of the traits studied. Proportions of provenance to phenotypic variance were also generally low, being 0.02–0.22 for growth and 0.01–0.23 for QSB resistance. Genetic correlations were significant and positive between growth traits and also between growth and QSB resistance, meaning that better growth at older ages could be expected from early-stage selection in growth and/or QSB resistance in CCV. Except for 29-month-old breast-high diameter, type-B correlations between trials were significant for all the traits, which suggested strong genotype by environment effects.

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Acknowledgements

This work was financially supported by the Department of Science and Technology of Guangxi Zhuang Autonomous Region, China (Guike AA17204087-3 and Linke 201802), Research Funds of Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation (2020-A-01-02 and 17-A-01-01), and the Department of Human Resources and Social Security of Guangxi Zhuang Autonomous Region, China (GuiCaiSheHan[2018]112). The authors would like to thank Yanfang Liang and Jiang He for valuable cooperation in plant material establishment and maintenance. We also thank Wei Zhou, Yuan Liu, Cuixiang Lu, Qi Wu, and Zhendao Wei for kind assistance in field trial investigation.

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Correspondence to Changrong Li.

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Chen, S., Chen, J., Yi, G. et al. Genetic parameters for growth and Quambalaria shoot blight resistance in Corymbia citriodora subsp. variegata. Euphytica 217, 124 (2021). https://doi.org/10.1007/s10681-021-02848-2

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  • DOI: https://doi.org/10.1007/s10681-021-02848-2

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