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Published on: June 15, 2019
New perspective for evaluating the main Camellia oleifera cultivars in China
Quanen Deng1, Jianan Li2, Chao Gao3
1Key Laboratory of Non-Wood Forest Product of State Forestry Administration, Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees of Ministry of Education, 2011 Cooperative Innovation Center of Cultivation and Utilization for Non-Wood Forest Trees of Hunan Province, Engineering Technology Research Center of Southern Hilly and Mountainous Ecological Non-Wood Forest Industry of Hunan Province, College of Forestry, Central South University of Forestry and Technology, No. 498 Shaoshan South Road, Changsha, 410004, China.
Abstract:
To assess the adaptability of Camellia oleifera for introduction in new growth locations, this study evaluated 10 representative C. oleifera cultivars from the main areas in China where this oil-producing evergreen crop is grown. Cluster analysis, correlation analysis, and membership function analysis were used to evaluate various indices of the selected C. oleifera cultivars, including flowering phenology, cold tolerance, leaf structure, pollen characteristics, and pollen viability. The correlation analysis identified the full blossoming time, leaf palisade and spongy tissue thickness, pollen deformity rate, and pollen activity as key indices for determining the adaptability of the cultivars to new areas. The membership function analysis of the 10 C. oleifera cultivars revealed the following order of adaptability: 'XLC25' > 'Changlin4hao' > 'Ganzhouyou8hao' > 'Ganzhouyou6hao' > 'Tiechengyihao' > 'Eyou465' > 'XLC10' > 'Changlin3hao' > 'Changlin18hao' > 'QY235.' When introducing C. oleifera cultivars to new regions, the higher-ranked cultivars are more likely to be successful. The results of this study may provide a new direction for the comprehensive assessment of plant introduction and domestication potential, i.e., the assessment of the vegetative and reproductive growth, adversity resistance, and blossoming time of plants.
