Molecular markers reveal low genetic diversity in Casuarina equisetifolia clonal plantations in South China,New forests

当前位置： X-MOL 学术 › New Forests › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Molecular markers reveal low genetic diversity in Casuarina equisetifolia clonal plantations in South China
New forests ( IF 1.9 ) Pub Date : 2019-10-05 , DOI: 10.1007/s11056-019-09752-7
Wei Yu , Yong Zhang , Xiuyu Xu , Chonglu Zhong , Yongcheng Wei , Jingxiang Meng , Yu Chen , Zhen Li , David Bush

Casuarina equisetifolia is planted extensively in clonally-established coastal shelterbelts in South China. During the last decade, the plantations have been severely attacked by Ralstonia solanacearum bacterial wilt, causing widespread decline and mortality. It has been thought that lack of genetic diversity, both within individual sites and at a regional scale, may render the plantations particularly susceptible to attack. Analysis of samples from 109 separate plantations in three provinces, Hainan, Guangdong and Fujian, using microsatellite molecular markers, revealed that only 22 separate clones are in use. Analysis of co-ancestry among the clones further revealed that many are closely related, consistent with selection of new clones from the sexually-reproduced offspring of existing ones, or selection of multiple clones from individual seedling families. Comparison with wild materials from throughout the species’ natural range indicated that the origins of the South China clones are most likely from within the Southeast Asian region. We recommend diversifying the genetic base of planting material in South China and planting a more-diverse mix of unrelated clones at local and regional scales.

更新日期：2019-10-05

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11