首页分享浙江4个主要茶树群体种资源表型性状及遗传多样性分析

浙江4个主要茶树群体种资源表型性状及遗传多样性分析

来源：花匠小妙招时间：2024-11-26 01:36

摘要：

以分别取自当地茶园的天台、龙山、木禾及鸠坑群体材料为研究对象,通过统计及相关性分析对共330份材料的16项表型性状进行对比及遗传多样性研究,结果表明:除雌雄蕊相对高度在4个群体中均无显著性差异(雌高雄低)外,其余性状在品种间的差异较大,性状参数变异系数在4.46%~44.90%,平均为25.28%,其中叶片着生状态平均变异系数最大,达41.43%;以茶花为研究对象,遗传多样性较为丰富的群体为天台群体,且其在简单重复序列(simple sequence repeat, SSR)标记下展现出较高的分子多态性;以叶为研究对象,鸠坑群体是更为理想的材料;花叶兼用则木禾群体是较优的材料,其拥有遗传多样性高的表型性状最多。此外,不同地理条件对龙山群体影响较大。总的来说,4个茶树群体表型多样性丰富且各具特异性,均具有较高的定向育种潜力。

关键词: 茶树群体, 表型性状多样性, 简单重复序列标记

Abstract:

Based on the 330 samples of Tiantai, Longshan, Muhe and Jiukeng populations taken from the local tea gardens, 16 phenotype traits (leaves, new tops and flowers) were compared through statistical analysis and related analysis, and genetic diversity research. The results showed that, in addition to the relative height between gynoecium and androecium in the four groups had no significant difference, the remaining agronomic traits in different populations showed different degrees of diversity. In the four populations surveyed, the coefficient of variation of agronomic trait parameters was between 4.46% and 44.90%, with an average of 25.28%, of which the coefficient of variation of leaf attitude was the highest, reaching 41.43%. For the study object of flowers, the group with rich genetic diversity of agronomic traits was Tiantai population, and it showed high molecular polymorphism under the SSR mark. With leaves as the study object, the Jiukeng population was the ideal material, and for the flower-leaf, Muhe is the best material. In addition, different geographical conditions had a greater impact on the Longshan population, while other groups were relatively stable. In general, the four tea populations had rich phenotype diversity and specific characteristics, all of which had high targeted breeding potential.

Key words: tea population, agronomic traits diversity, simple sequence repeats marker

中图分类号:

S571.1