Progeny Test of Second Generation Eucalyptus camaldulensis Dehnh. at Wang Nam Khiao Forestry Student Training Station

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Sunis Yodnam
Chongrak Wacharinrat
Sapit Diloksumpun

Abstract

 


The study examined the growth and desirable traits in a progeny test of second generation Eucalyptus camaldulensis Dehnh. planted at the Wang Nam Khiao Forestry Student Training Station, Wang Nam Khiao district, Nakhon Ratchasima province. The objective of this study was to select superior families indicated by fast growth, desirable traits and high heritability value. A Latinized row-column design was applied using 120 families selected from 22 provenances from open pollination in the first generation of a provenance/progeny test of the Royal Forest Department and from one plantation in Thailand as the control. The results at age 24 months showed that the survival rate varied from 45 to 100%. Most of families from the Petford region, Queensland tended to have higher survival percentages. Families with superior growth performance were from Walsh-Mitchell river, Queensland region, especially families 187 and 188 from Healeys Yard. Other families from the Kennedy river provenance of the Other Queensland region and families from Eureka Ck/Tributaries provenance from the Petford region were also classified in the group with best growth performance.


The desirable traits were significantly different among provenances, but Leptocybe invarsa damage was not significantly different among provenances. In addition, families selected from the first generation of the provenance/progeny test showed better characteristics than those from Thai- land races, with regard to complete persistence, vertical stem, straight stem, small branching and good self pruning. For narrow sense heritability estimates, tree growth of Eucalyptus camaldulensis was strongly influenced by genetics, but the desirable traits were moderately correlated with environmental factors. The findings suggested that propagation of this species can be carried out by collecting seeds from either the first generation or the second generation.


 


Keywords:  Eucalyptus camaldulensis, progeny test, growth and characteristics

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How to Cite
Yodnam, S. ., Wacharinrat, C. ., & Diloksumpun, S. . (2022). Progeny Test of Second Generation Eucalyptus camaldulensis Dehnh. at Wang Nam Khiao Forestry Student Training Station. Thai Journal of Forestry, 29(2), 37–49. Retrieved from https://li01.tci-thaijo.org/index.php/tjf/article/view/255743
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Original Articles