汝城白毛茶种群个体间亲缘关系的RAPD分析

采用RAPD技术,对汝城白毛茶种群个体间的亲缘关系进行了分析。研究结果:汝城白毛茶种群个体单株扩增的谱带数最多时为13条,最少时为10条;DNA多态性最高为92.31%,最低为70.00%,平均为85.40%。结果表明汝城白毛茶种群呈现丰富的遗传多样性。汝城白毛茶种群单株间的遗传距离最小为0.0882,最大为0.5791。聚类分析结果表明汝城白毛茶种群中有些单株聚类很近,遗传基础比较一致,有些聚类较远,显示其丰富的遗传多样性。研究发现种群单株间的遗传变异呈现连续性,当结合距离I为0.14时,汝城白毛茶种群可分为6个类型,这与其表观形态类型相符。本文运用分子生物学方法证明汝城白毛茶的核心种质基因群在汝城县白毛茶示范场得到了有效保护。

Analysis of Genetic Relationships among "Rucheng Baimao Cha" Plants with RAPD Method

The genetic relationships of the individual plants among the 揜ucheng Baimao Cha?population were studied with the RAPD method. The results were as follows: The maximum number of PCR bands of the individual plants among the 揜ucheng Baimao Cha?population was 13,and the minimum number was 10. The maximum DNA polymorphism amplified by RAPD-PCR was 92.31%, while the minimum was 70.00%; the average was 85.40%. This result showed the abundant genetic diversities. The maximum genetic distances among individual plants of the 揜ucheng Baimao Cha?population was 0.5791; the minimum one was 0.0882. The result from the DNA molecular dendrogram showed that the variation among individual plants of揜ucheng Baimao Cha?population was continuous. The cluster analysis by UPGMA showed that the 揜ucheng Baimao Cha攑opulation could be divided into 6 groups. This result matched the morphologic characteristics of the population. From the DNA molecular dendrogram it was showed that the key germplasm groups were protected in the Rucheng Baimao Cha Demonstration Farm in Rucheng county, Hunan province, P. R. China.