DOI: 10.1016/j.foreco.2017.08.030
Scopus记录号: 2-s2.0-85028771532
论文题名: Genetic parameter estimates for growth, stem-form and branching traits of Casuarina junghuhniana clones grown in Thailand
作者: Luechanimitchit P. ; Luangviriyasaeng V. ; Laosakul S. ; Pinyopusarerk K. ; Bush D.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2017
卷: 404 起始页码: 251
结束页码: 257
语种: 英语
英文关键词: Broad-sense heritability
; Genetic correlation
; Mean annual increment
Scopus关键词: Cloning
; Forestry
; Genes
; Plants (botany)
; Broad-sense heritability
; Commercial plantation
; Genetic correlation
; Genetic parameters
; Mean annual increments
; Planting materials
; Stem straightness
; Tropical plantations
; Parameter estimation
; Casuarina junghuhniana
英文摘要: Casuarina junghuhniana is an emerging tropical plantation species that is increasingly being planted on tropical lowland and mid-altitude sites with moderate dry seasons. Field trials have been established to investigate genetic variation in the species with a view to identifying genetically improved planting material. In this study genetic parameters were estimated for nine growth traits using 29 novel clones of Casuarina junghuhniana planted in Thailand. Survival, height, diameter and stem volume were recorded annually for six consecutive years and compared with a commercially-deployed, Thai benchmark clone. Stem form (axis persistence and stem straightness) and branching habit (branch density, branch thickness and branch angle) were scored when the trees were 4 years of age. Marked variation among clones was observed for all traits at each measurement. While the stand had attained a mean annual increment of 20.8 m3 ha−1 y−1 by year 6, the most productive clone was double the average and four times greater than the benchmark. Broad-sense heritability estimates (Ĥ2) for most traits were moderate (0.13–0.50), and there was a tendency for Ĥ2 to increase with age for survival, diameter and stem volume. There were no correlations between growth and stem form, but growth was negatively correlated with branch thickness and positively correlated with branch angle. Age-age correlation for growth was strong, suggesting that selection for stem volume need not be delayed beyond 3 years. Based on the growth and stem form traits, up to 11 clones are considered suitable for commercial plantation establishment. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64121
Appears in Collections: 影响、适应和脆弱性
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作者单位: Royal Forest Department, Phahonyothin Road, Chatuchak, Bangkok, Thailand; CSIRO Australian Tree Seed Centre, GPO Box 1600, Canberra, ACT, Australia
Recommended Citation:
Luechanimitchit P.,Luangviriyasaeng V.,Laosakul S.,et al. Genetic parameter estimates for growth, stem-form and branching traits of Casuarina junghuhniana clones grown in Thailand[J]. Forest Ecology and Management,2017-01-01,404