Key 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.
Institute for Forest Resources & Environment of Guizhou, Guizhou University, Guiyang, 550025, China.
Sci Rep. 2020 Nov 26;10(1):20676. doi: 10.1038/s41598-020-77609-7.
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.
为评估油茶在新生长区的适应性，本研究评价了来自中国油茶主要种植区的 10 个代表性品种。采用聚类分析、相关分析和隶属函数分析对所选油茶品种的开花物候期、耐寒性、叶片结构、花粉特性和花粉活力等各项指标进行评价。相关分析确定了盛花时间、叶片栅栏组织和海绵组织厚度、花粉畸形率和花粉活力作为衡量品种对新地区适应性的关键指标。对 10 个油茶品种的隶属函数分析表明，其适应性的排序如下：‘XLC25’>‘长林 4 号’>‘赣州油 8 号’>‘赣州油 6 号’>‘铁翅长宜 1 号’>‘粤油 465’>‘XLC10’>‘长林 3 号’>‘长林 18 号’>‘QY235’。在将油茶品种引入新地区时，排名较高的品种更有可能成功。本研究的结果可能为植物引种和驯化潜力的综合评价提供新的方向，即评估植物的营养和生殖生长、抗逆性和开花时间。
