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Plus tree selection is the first step to improve production and quality in forestry. An individual-based method is widely used to select plus trees for timber production, timber form, freedom from diseases and insects. In this study, a method to select plus trees for flower production is described and named as a crown-area-based method. Both individual-based and crown-area-based methods were used to select plus trees for Camellia impressinervis, a golden camellia; its yellow flowers have been used to treat sore throat and diarrhea, and to prevent cancers in China and Vietnam. Flower production of 21 concerned individuals was compared to the population mean and it was generated as a percentage. The population mean of the individual-based method is the mean of production of 21 trees as mean production/tree. While population mean of the crown-area-based method is mean production/m2 crown area (first production/m2 crown area for each tree was generated, then mean for population). The results indicated that both methods show seven individual trees with flower production >100% population mean. However, individual trees are different. Only five of 7 trees are the same in both methods. The tree rankings by flower production percentage in both methods are totally different. The highest ranking by individual-based method (310% mean) is 4th ranking by crown-area-based method (181% mean). While the highest ranking by crown-area-based method (270% mean) is third ranking by individual-based method (260% mean). It is concluded that crown-area-based method is better in selecting plus trees for flower purpose, as it considers the crown area which is known as a productive part of a tree to form flowers.
Schreiner EJ. Some suggestions for plus tree selection and seedling seed orchards. Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference; 1962.
Miller GW, Schuler TM, Smith HC. Method for applying group selection in central Appalachian hardwoods. Northeastern Forest Experiment Station. Research Pam. 1995:NE-696.
Carrasquinho I, Freire J, Rodrigues A, Tome M. Selection of Pinus pinea L. plus tree candidates for cone production. Annals of Forest Science. 2010;67:814.
Mutke S, Gordo J, Gil L. Variability of mediterranean stone pine cone production: Yield loss as response to climate change. Agriculture and Forest Meteorology. 2005;132:263–272.
Zobel B, Talbert J. Applied forest tree improvement, John Wiley & Sons, New York. 1984;505.
Hansen WM. A personal view. The Third International Academic Forum on Yellow Camellias. 2013:17–19.
Hung TC, L Ye. Camellia impressinervis Hung T. Chang & S. Ye Liang. Acta Scientiarum Naturalium Universitatis Sunyatseni. 1979;18:72.
Nguyen VT, Phung DT, Tran DM, Nguyen TT, Dang VT, Dao TD, Mai TL, Nguyen TTP, Ninh VK, Vu TL, Nguyen HT, Hoang TS, Trinh NB, Ho TL, Vu VT, Tran VD. Possible planting areas for golden camellia - Camellia impressinervis in Vietnam. Asian Journal of Agriculture and Horticultural Research. 2019;3:1–7.
Tran DM, Nguyen TT, Hoang TS, Dang VT, Phung DT, Nguyen VT, Dao TD, Mai TL, Vu TL, Nguyen HT, Nguyen TTP, Tran VD. Golden camellias: A review. Archives of Current Research International. 2019;16:1–8.
Tran VD. Overview of golden camellias in Cao Bang. Scientific Report. Silviculture Research Institute. Hanoi, Vietnam; 2018.
Huang YL, Chen YY, Wen YX, Li DP, Liang RG, Wei X. Effects of the extracts from Camellia nitidssimas leaves on blood lipids. Lishizhen Medicine and Materia Medica Research. 2009;4:5.
He D, Wang X, Zhang P, Luo X, Li X, Wang L, Li S, Xu S. Evaluation of the anxiolytic and antidepressant activities of the aqueous extract from Camellia euphlebia Merr. ex Sealy in Mice. Evidence-Based Complementary and Alternative Medicine; 2015.
[Article ID 618409]
Guangxi institute of Botany. Guangxi Flora. Guangxi Science and Technology Press: Nanning; 1991.
Wan CP, Yu YY, Zhou SR, Cao SW. Antioxidant and free radical scavenging activity of Camellia nitidissima Chi. Asian Journal of Chemistry. 2011;23:2893–2897.
Dao TTD, Mai TTL, Tran DM, Dang VT, Ly TTH, Nguyen VT, Phung DT, Nguyen TTP, Ninh VK, Dang THH, Tran CN, Tran HQ, Pham DS, Vu TL, Nguyen HT, Hoang TS, Trinh NB, Ho TL, Tran AH, Duong QT, Nguyen QH, Tran HV, Nguyen THA, Dinh HD, Vu VT, TVD. Cutting size and position affect rooting efficiency of Camellia impressinervis: A golden camellia. Plant Cell Biotechnology and Molecular Biology. 2019;20:179– 187.
Kokutse AD, Stokes A, Bailleres H, Kokou K, Baudasse C. Decay resistance of Togolese teak (Tectona grandis L.f) heartwood and relationship with colour. Trees. 2006;20:219–223.
Kokutse AD, Akpene AD, Monteuuis O, Akossou A, Langbour P, Guibal D, Tomazello MF, Gbadoe E, Chaix G, Kokou K. Selection of plus trees for genetically improved teak varieties produced in Benin and Togo. Boiset Forets des Tropiques. 2016;328:2.
Adjonou K, Kokutse AD, Kokou K, Ganglo J, Foucault DB. Environmental and wood biophysical variabilities in teak plantations in Togo (West Africa). Acta Botanica Gallica. 2010;157:387 –399.