黄河三角洲滨海湿地芦苇遗传变异及其与生境盐度的关系

生态学杂志

黄河三角洲滨海湿地芦苇遗传变异及其与生境盐度的关系

张俪文¹,王安东²,赵亚杰²,陈琳^1,3,宋建彬²,杨长志²,韩广轩^1*

(¹中国科学院烟台海岸带研究所，中国科学院海岸带环境过程与生态修复重点实验室，山东烟台 264003；²山东省黄河三角洲国家级自然保护区管理局，山东东营 257091；³聊城大学，山东聊城 252000）

出版日期:2018-08-10 发布日期:2018-08-10

Genetic variation of Phragmites australis and its relationship with salinity in the coastal wetland of Yellow River Delta.

ZHANG Li-wen¹, WANG An-dong², ZHAO Ya-jie², CHEN Lin^1,3, SONG Jian-bin², YANG Chang-zhi², HAN Guang-xuan^1*

(¹Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, Shandong, China; ²Administration Bureau of the Yellow River Delta National Nature Reserve, Dongying 257091, Shandong, China; ³Liaocheng University, Liaocheng 252000, Shandong, China).

Online:2018-08-10 Published:2018-08-10

摘要/Abstract

摘要： 了解植物遗传多样性信息能够为植被的生态修复和保育提供科学参考。本研究在黄河三角洲滨海湿地采集了7个芦苇群体280个个体的叶片，采用12对微卫星分子标记引物进行遗传多样性和遗传结构分析，并分析了遗传多样性和生境盐度的相关关系。结果显示，芦苇群体遗传多样性较低，7个群体的Nei遗传多样性（H）平均值在0.077～0.107，Shannon信息指数（I）平均值在0.133～0.185，但潮汐湿地芦苇群体遗传多样性相对高（H=0.101～0.107；I=0.176～0.185）。芦苇群体遗传分化比较低（G_ST=0.062），遗传变异主要来自于群体内。群体间遗传距离与地理距离无显著相关性（r=0.026，P=0.354），但遗传多样性与生境的盐度具有正相关关系（R_{adj 2}=0.597，P=0.026）。建议山东黄河三角洲国家级自然保护区优先保护潮汐湿地芦苇群体，而在修复湿地时可以选择其他地区芦苇种苗或繁殖体以丰富种群的遗传多样性。

关键词: 凋落物, 鲜叶, 植硅体碳, 毛竹, 植硅体碳封存速率, 采样时间

Abstract: Investigating plant genetic diversity can provide basic knowledge for vegetation conservation and ecological restoration. Leaves of 280 individuals from seven Phragmites australis populations in the Yellow River Delta were sampled. We analyzed the genetic structure and diversity of seven P. australis populations at 12 loci using microsatellite markers, and analyzed the relationship between genetic diversity and salinity. Results showed that the genetic diversity in these P. australis populations was low. The Nei’s genetic diversity index (H) ranged from 0.077 to 0.107 and the Shannon information index (I) ranged from 0.133 to 0.185. However, the genetic diversity of two populations from high marsh was relatively high (H=0.101-0.107, I=0.176-0.185). The genetic divergence of these populations was low (G_ST=0.062), with most of them coming from intrapopulation. Moreover, there was no significant relationship between genetic distance and geographic distance (r=0.026, P=0.354). However, the relationship of genetic diversity and salinity was positively significant (R_{adj 2}=0.597, P=0.026). These results suggested that P. australis populations from tidal marsh in the Yellow River Delta should be protected and that seedlings or propagules from populations of other regions could be used to enrich genetic diversity of P. australis in the degraded wetland during restoration.

Key words: litterfall, PhytOC sequestration rate., sampling time, Moso bamboo, living leaf, phytolith-occluded organic carbon (PhytOC)

张俪文,王安东,赵亚杰,陈琳,宋建彬,杨长志,韩广轩. 黄河三角洲滨海湿地芦苇遗传变异及其与生境盐度的关系[J]. 生态学杂志.

ZHANG Li-wen, WANG An-dong, ZHAO Ya-jie, CHEN Lin, SONG Jian-bin, YANG Chang-zhi, HAN Guang-xuan. Genetic variation of Phragmites australis and its relationship with salinity in the coastal wetland of Yellow River Delta.[J]. cje.

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