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不同时期广西马尾松优良种源的遗传多样性变化趋势(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2016年05期
Page:
41-46
Column:
研究论文
publishdate:
2016-09-30

Article Info:/Info

Title:
A study on changes of genetic diversity for nearly 50 years in superior provenances of Pinus massoniana in Guangxi
Article ID:
1000-2006(2016)05-0041-06
Author(s):
FENG Yuanheng12 YANG Zhangqi1* LI Huogen2*LUO Qunfeng1 WU Dongshan1 HUANG Yongli3
1.Guangxi Institute of Forestry Science,Nanning 530002,China;
2. Key Lab of Forest Genetics and Biotechnology of Ministry of Education, Nanjing Forestry University, Nanjing 210037, China;
3. Nanning Forestry Division, Nanning 530107, China
Keywords:
Pinus massoniana provenance genetic diversity SSR
Classification number :
S718.46; Q347
DOI:
10.3969/j.issn.1000-2006.2016.05.007
Document Code:
A
Abstract:
In view of the situation of constant human disturbance to the natural resources of Guangxi Pinus massoniana(masson pine), the dynamic changes of the genetic diversity in provenances of masson pine were studied to provide important reference for the protection of the natural germplasm resources of masson pine. Sixteen SSR molecular markers were used to analyze the genetic diversity of eight populations in three provenances from Guangxi Tongmian, Gupeng and Yunkai Mountain which were collected in 1950s, 1980s and 2012. At the present stage, the mean number of Shannon's information index(I), observed heterozygosity(Ho)and expected heterozygosity(He)in Tongmian provenance were 0.64, 0.35 and 0.36 respectively, while Gupeng provenance were 0.53, 0.36 and 0.32 respectively. Compared the genetic diversity level of the 3 provenances, Tongmian provenance possessed the highest genetic diversity, Gupeng followed, Yunkai mountain was relatively low. Coefficient of genetic differentiation among populations(GST)was 0.04, average FST was 0.026, gene flow(Nm)was 9.56. The results showed that no significant genetic differentiation was available among three provenances, and gene flow among them was smooth. Through the comparing and analyzing of genetic diversity of different periods, the Shannon's information index(I)and expected heterozygosity(He)of Tongmian provenance decreased by 5% and 10% within 18 years, and Gupeng provenance dropped 13% and 14%. Which indicated that over the time masson pine natural resources were affected by human interference more and more, genetic diversity is gradually losing, we urgently need to carry out targeted protection.

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Last Update: 2016-10-30