To determine the age of oil-tea camellia trees, regression equations including Logistic, Mitscherlich, Gompertz, Korf, and Richards were used to calculate accumulative growth rate using basal trunk disc and investigat...To determine the age of oil-tea camellia trees, regression equations including Logistic, Mitscherlich, Gompertz, Korf, and Richards were used to calculate accumulative growth rate using basal trunk disc and investigate the relations between the age of oil-tea camellia trees and their growth rate of secondary trunk. The Gompertz equation Y=71.296 1exp （-3.874 4exp （-0.006 4t）） was the most optimal equation to simulate the accumulative growth rate of basal trunk disc. This equation could be used to estimate the age of oil-tea camellia trees that grow under similar environmental conditions. The Korf equation Y=576.900 1exp （-4.153 0x -0.314 2 ） was the best equation to describe the relation between the age and growth rate of different secondary trunks. With the adjustment coefficient and average growth of different secondary trunk discs, it is possible to predict the age of ancient oil-tea camellia trees that grow under similar environmental conditions. In addition, taking three or more discs from the same diameter group and calculating their average growth rate could lead to more accurate results. For trees that grow in different areas, environmental conditions should be carefully considered when using the above two equations to predict the age of ancient oil-tea camellia trees.展开更多
为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体...为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体间平均有效等位基因数为3.48个;观测等位基因数(N_(a))为6.25;有效等位基因数(N_(e))为2.983;Shannon多样性指数(I)为1.251;Nei基因多样性指数(H)为0.646。POPGENE分析表明遗传分化系数(F_(st))为0.063,居群间存在中度分化,基因流(N_(m))为3.710。AMOVA分子方差分析表明,阿萨姆茶的遗传变异14%发生在居群间,86%发生在居群内,说明阿萨姆茶居群遗传变异主要发生在居群内部,且基因交流丰富。南涧县古茶园古茶树居群的遗传多样性丰富,这为阿萨姆茶种质资源的保护利用和新品种选育提供了科学依据。展开更多
基金Supported by Hunan Forestry Science and Technology Project(XLK201707)
文摘To determine the age of oil-tea camellia trees, regression equations including Logistic, Mitscherlich, Gompertz, Korf, and Richards were used to calculate accumulative growth rate using basal trunk disc and investigate the relations between the age of oil-tea camellia trees and their growth rate of secondary trunk. The Gompertz equation Y=71.296 1exp （-3.874 4exp （-0.006 4t）） was the most optimal equation to simulate the accumulative growth rate of basal trunk disc. This equation could be used to estimate the age of oil-tea camellia trees that grow under similar environmental conditions. The Korf equation Y=576.900 1exp （-4.153 0x -0.314 2 ） was the best equation to describe the relation between the age and growth rate of different secondary trunks. With the adjustment coefficient and average growth of different secondary trunk discs, it is possible to predict the age of ancient oil-tea camellia trees that grow under similar environmental conditions. In addition, taking three or more discs from the same diameter group and calculating their average growth rate could lead to more accurate results. For trees that grow in different areas, environmental conditions should be carefully considered when using the above two equations to predict the age of ancient oil-tea camellia trees.
文摘为探究栽培型古茶树阿萨姆茶(Camellia sinensis var. assamica)种质资源的遗传多样性,采用EST-SSR分子标记技术对云南南涧县无量山镇古茶园64份种质资源进行遗传多样性和遗传结构分析。结果表明, 20对引物共检测出223个等位基因,群体间平均有效等位基因数为3.48个;观测等位基因数(N_(a))为6.25;有效等位基因数(N_(e))为2.983;Shannon多样性指数(I)为1.251;Nei基因多样性指数(H)为0.646。POPGENE分析表明遗传分化系数(F_(st))为0.063,居群间存在中度分化,基因流(N_(m))为3.710。AMOVA分子方差分析表明,阿萨姆茶的遗传变异14%发生在居群间,86%发生在居群内,说明阿萨姆茶居群遗传变异主要发生在居群内部,且基因交流丰富。南涧县古茶园古茶树居群的遗传多样性丰富,这为阿萨姆茶种质资源的保护利用和新品种选育提供了科学依据。
