贵州古茶树种质资源基于形态特征的多样性研究

以分布在贵州的32个分布地的古茶树种质资源为材料,从形态学上对144份贵州古茶树种质资源进行多样性评价,结果表明:除树姿外,其他9个形态性状变异系数均达 35%以上,10个形态性状多样性指数均达到0.85以上;前4个主成分因子累计贡献率仅达到85.97%;5个生态区中,黔西南分布区的古茶树种质资源的形态遗传多样性与其他分布区相比较广泛;在欧氏距离5.60处供试材料明显分为3大类型;第Ⅰ类包括27个材料,该类材料主要来自于黔东南分布区、黔中分布区、黔西南分布区和黔北分布区,第Ⅱ类包括10个材料,主要来自黔西南分布区的晴隆县,第Ⅲ类包括107份材料,分布较为广泛。

Diversity of ancient tea germplasm based on morphological characteristics in Guizhou

In this study, 144 ancient tea germplasm distributed in 32 zones were evaluated to analyze the variation of morphological characters and the diversity, and to provide theoretical basis for the utilization of ancient tea germplasm by morphological way in Guizhou. The results showed that the variation coefficients of 9 morphological traits were above 35% except tree posture, and the diversity index of 10 morphological traits was above 0.85; the cumulative contribution rate of the first four principal component factors was only 85.97%. Among the five ecological zones, the morphological and genetic diversity of ancient tea germplasm resources in southwestern Guizhou was wider than that in other zones. Three groups were divided at the distance of 5.60. The first group included 27 samples, which mainly came from southeastern Guizhou, central Guizhou, southwestern Guizhou and northern Guizhou. The second group included 10 samples, which mainly came from Qinglong in southwestern Guizhou. The third group included 107 samples, which were widely distributed.