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|本期目录/Table of Contents|

鼎湖血桐种群生物学及遗传多样性初步研究

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2010年01期
页码:
70
栏目:
植物生态学与生物地理学
出版日期:
2010-01-25

文章信息/Info

Title:
Population biology and genetic diversity of Macaranga sampsonii
作者:
肖 炜12王峥峰1曹洪麟1叶万辉1黄国敏12
1. 中国科学院 华南植物园, 广州 510650; 2.中国科学院 研究生院, 北京 100049
Author(s):
XIAO Wei 12 WANG Zheng-Feng1 CAO Hong-Lin1YE Wan-Hui1* HUANG Guo-Min12
1. South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China; 2.Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
关键词:
鼎湖血桐' target='_blank'> FONT-FAMILY: 宋体">鼎湖血桐 点格局分析 径级结构分析 微卫星 r对策 阳生植物
Keywords:
Macaranga sampsonii Macaranga sampsonii ' target='_blank'> FONT-FAMILY: 宋体"> Points pattern analysis DBHclass structure analysis microsatellite rstrategy lightdependent plant
分类号:
-
DOI:
-
文献标识码:
A
摘要:
采用点格局分析、径级结构分析以及微卫星筛选等方法,对鼎湖山保护区20 hm2永久样地中的鼎湖血桐进行了种群生物学及遗传多样性研究。结果表明:鼎湖血桐是一种r对策型阳生植物,种群年龄结构呈金字塔型;植株受光照不足的胁迫,种群大部分个体聚集分布于光照充足的林窗中;通过磁珠富集法筛选出鼎湖血桐特异性微卫星引物13对,其中2对具备多态性,多态百分率为15.4%,多态信息含量在0~0.3734之间,平均期望杂合度为0.0756,远低于同属其它植物。研究表明鼎湖血桐对环境变化的适应范围较窄,遗传多样性较低,应对其种质资源进行多样性评估与保护。
Abstract:
An analysis of population biology and genetic diversity of Macaranga sampsonii was taken in DHS20hm2 permanent plots,which locates on the Dinghushan natural reserve. By use of point pattern analysis and DBHclass structure analysis,it was concluded that M.sampsonii was a lightdependent egy,whose population age structure was approximately pyramidlike. The population habitat was restricted in the canopy gaps because of sunlight deficiency stress. Thirteen microsatellite loci were isolated by methods of magnetic beads enrichment,in which only two loci(15.4%)were polymorphic. The polymorphic information content of these loci ranged from 0 to 0.3734.The average expected heterozygosity of M.sampsonii was 0.0756,which was obviously lower than other Macaranga species. These results indicated that M.sampsonii was in a narrow environment adaptation range and a low population genetic diversity. We should take measures to evaluate and protect its germplasm resource.

参考文献/References

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备注/Memo

备注/Memo:
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更新日期/Last Update: 2010-04-01