Genetic parameters for growth and wood chemical properties in Eucalyptus urophylla × E. tereticornis hybrids
Growth and wood chemical properties are important pulpwood traits. Their narrow-sense heritability ranged from 0.03 to 0.49 in Eucalyptus urophylla × E. tereticornis hybrids, indicating low to moderate levels of genetic control. Genetic correlations were mostly favorable for simultaneous improvement on growth and wood traits. Additive and non-additive genetic effects should be considered in making a hybrid breeding strategy.
Eucalypt hybrids are widely planted for pulpwood production purposes. Genetic variations and correlations for growth and wood chemical traits remain to be explored in Eucalyptus interspecific hybrids.
Our objectives were to clarify the heritability of growth and wood chemical traits and determine the genetic correlations between traits and between trials in E. urophylla × E. tereticornis hybrids.
Two trials of 59 E. urophylla × E. tereticornis hybrids derived from an incomplete factorial mating design were investigated at age 10 for growth (height and diameter) and wood chemical properties (basic density, cellulose content, hemi-cellulose content, lignin content, and syringyl-to-guaiacyl ratio). Mixed linear models were used to estimate genetic parameters.
Narrow-sense heritability estimates were 0.13−0.22 in growth and 0.03−0.49 in wood traits, indicating low to moderate levels of additive genetic control. Genetic correlations were mostly positively significant for growth with basic density and cellulose content but negatively significant with hemi-cellulose and lignin contents, being favourablefavorable for pulpwood breeding purpose. Type-B correlations between sites were significant for all the traits except diameter and lignin content.
Hybrid superiority warrants the breeding efforts. An appropriate breeding strategy should be able to capture both additive and non-additive genetic effects.
KeywordsEucalyptus hybrid Growth Wood chemical property Heritability Genetic correlation Type-B correlation
The authors would like to thank Kunming Wu, Juying Wu, Jianwen Li, Wei Wu, Changfu Hong, and Bingnan Wang for the valuable cooperation in plant material establishment and maintenance. We also thank Zhaoyuan Zhang, Jingquan Lin, Yong Guo, and Xiaoli Yu for the kind assistance in the field trial investigation and wood sample collection. We are grateful to Shiyu Fu for the standard measurement of the wood chemical properties for NIR calibration establishment.
This work was financially supported by the Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2017SY018 and CAFYBB2017ZY003) and Guangdong Natural Science Foundation (2016A030310007).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Apiolaza LA, Raymond CA, Yeo BJ (2005) Genetic variation of physical and chemical wood properties of Eucalyptus globulus. Silvae Genet 54:160–166Google Scholar
- Balasaravanan T, Chezhian P, Kamalakannan R, Ghosh M, Yasodha R, Varghese M, Gurumurthi K (2005) Determination of inter- and intra-species genetic relationships among six Eucalyptus species based on inter-simple sequence repeats (ISSR). Tree Physiol 25:1295–1302. https://doi.org/10.1093/treephys/25.10.1295 CrossRefPubMedGoogle Scholar
- Bouvet JM, Vigneron P (1995) Age trends in variances and heritabilities in Eucalyptus factorial mating designs. Silvae Genet 44:206–216Google Scholar
- Denis M, Favreau B, Ueno S, Camus-Kulandaivelu L, Chaix G, Gion J-M, Nourrisier-Mountou S, Polidori J, Bouvet J-M (2013) Genetic variation of wood chemical traits and association with underlying genes in Eucalyptusurophylla. Tree Genet Genomes 9:927–942. https://doi.org/10.1007/s11295-013-0606-z CrossRefGoogle Scholar
- Eldridge K, Davidson J, Harwood C, van Wyk G (1993) Eucalypt domestication and breeding. Oxford University Press, New YorkGoogle Scholar
- FAO (1979) Eucalypts for planting. Food and Agriculture Organization of the United Nations, RomeGoogle Scholar
- Gan S, Li M, Li F, Wu K, Wu J, Bai J (2004) Genetic analysis of growth and susceptibility to bacterial wilt (Ralstonia solanacearum) in Eucalyptus by interspecific factorial crossing. Silvae Genet 53:254–258Google Scholar
- Gilmour AR, Gogel BJ, Cullis BR, Thompson R (2009) ASReml user guide release 3.0. VSN International Ltd, Hemel HempsteadGoogle Scholar
- Gonçalves JLM, Alvares CA, Higa AR, Silva LD, Alfenas AC, Stahl J, Ferraz SFB, Lima WP, Brancalion PHS, Hubner A, Bouillet J-PD, Laclau J-P, Nouvellon Y, Epron D (2013) Integrating genetic and silvicultural strategies to minimize abiotic and biotic constraints in Brazilian eucalypt plantations. For Ecol Manag 301:6–27. https://doi.org/10.1016/j.foreco.2012.12.030 CrossRefGoogle Scholar
- Greaves BL, Borralho NMG, Raymond CA (1997) Breeding objective for plantation eucalypts grown for production of kraft pulp. For Sci 43:465–472Google Scholar
- Hein PRG, Bouvet J-M, Mandrou E, Vigneron P, Clair B, Chaix G (2012) Age trends of microfibril angle inheritance and their genetic and environmental correlations with growth, density and chemical properties in Eucalyptus urophylla S. T. Blake wood. Ann For Sci 69:681–691. https://doi.org/10.1007/s13595-012-0186-3 CrossRefGoogle Scholar
- Liang K (2000) Study on trial of Eucalyptus species/provenance. For Res 13:203–208Google Scholar
- Liu Y, Wang D (2005) Rapid propagation of Eucalyptus urophylla × E. tereticornis cv M1 by tissue culture. J Southwest Agri Univ (Nat Sci) 27:237–239Google Scholar
- Lu Z, Xu J, Bai J, Zhou W (2000) A study on wood property variation between Eucalyptus tereticornis and Eucalyptus camalduensis. For Res 13:370–376Google Scholar
- Luo JZ, Arnold RJ, Cao JG, Lu WH, Ren SQ, Xie YJ, Xu LA (2012) Variation in pulp wood traits between eucalypt clones across sites and implications for deployment strategies. J Trop For Sci 24:70–82Google Scholar
- Nikles DG (1992) Hybrids of forest trees: the bases of hybrid superiority and a discussion of breeding methods. In: Lambeth C, Dvorak W (eds) Resolving tropical forest resource concerns through tree improvement, gene conservation and domestication of new species. North Carolina State University, Raleigh, pp 333–347Google Scholar
- Paul AD, Foster GS, Caldwell T, McRae J (1997) Trends in genetic and environmental parameters for height, diameter, and volume in a multilocation clonal study with loblolly pine. For Sci 43:87–98Google Scholar
- Peng S-Y, Xu J-M, Li G-Y, Chen Y (2013) Growth and genetic analysis of 42 Eucalyptus urophylla × E. tereticornis clones in Leizhou peninsula in China. J Central South Univ For Tech 33(4):23–27Google Scholar
- Pryor LD, Johnson LAS (1971) A classification of the eucalypts. Australian National University Press, CanberraGoogle Scholar
- Scheiner SM (1993) Genetics and evolution of phenotypic plasticity. Annu Rev Ecol Syst 24:35–68. https://doi.org/10.1146/annurev.es.24.110193.000343 CrossRefGoogle Scholar
- Turnbull JW (2007) Development of sustainable forestry plantations in China: a review. ACIAR impact assessment series report No. 45. ACIAR, CanberraGoogle Scholar
- Wallis ASA, Wearne RH, Wright PJ (1996) Analytical characteristics of plantation eucalypt woods relating to kraft pulp yields. APPITA J 49:427–432Google Scholar
- Wang H (2010) A Chinese appreciation of eucalypts. Science Press, BeijingGoogle Scholar
- Wei RP (2005) Genetic diversity and sustainable productivity of eucalypt plantations in China. In: Wang H (ed) Changing patterns: tree introduction and phytogeography. China Forestry Publishing House, Beijing, pp 19–27Google Scholar
- Wei X, Borralho NMG (1998) Genetic control of growth traits of Eucalyptus urophylla S. T. Blake in South East China. Silvae Genet 47:158–165Google Scholar
- Weng Q, He X, Li F, Li M, Yu X, Shi J, Gan S (2014) Hybridizing ability and heterosis between Eucalyptus urophylla and E. tereticornis for growth and wood density over two environments. Silvae Genet 63:15–24Google Scholar