Genetic differences between continuous and disjunct populations: some insights from sal (<Emphasis Type="Italic">Shorea robusta</Emphasis> Roxb.) in Nepal |
| |
Authors: | Madhav Pandey Thomas Geburek |
| |
Institution: | (1) Department of Genetics, Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Hauptstrasse 7, 1140 Vienna, Austria;(2) Faculty of Forestry and Environmental Management, Canadian Genomics and Conservation Genetics Institute, University of New Brunswick (UNB), Lab No.107, Tweeddale centre, 1350 Regent Street, Fredericton, NB, E3C 2G6, Canada |
| |
Abstract: | Sal (Shorea robusta Gaertn., Dipterocarpaceae) is a wind-pollinated tropical tree species found in southern Asia. We investigated the genetic
diversity and structure at four microsatellites of 15 populations comprising continuous-peripheral and disjunct-peripheral
populations in Nepal. Estimates of genetic diversity (N
A = 8.98, H
O = 0.62, H
E = 0.69) were similar when compared with those of other tropical tree species. A higher level of genetic diversity was observed
in continuous-peripheral populations (N
A = 9.61, H
O = 0.67, H
E = 0.72) as compared to disjunct-peripheral (N
A = 8.04, H
O = 0.55, H
E = 0.64). Population differentiation was higher among disjunct-peripheral populations (F
ST = 0.043) than among continuous peripherals (F
ST = 0.012). There was a significant association between gene flow distances and genetic differentiation (r
2 = 0.128, P ≤ 0.007). No spatial arrangement of populations according to their geographical locations was found. Based on observed genetic
diversity protection of some populations in continuous-peripheral range are suggested for the sustainable conservation of
genetic resources of the species while protection of some disjunct-peripheral populations are also recommended for conserving
rare alleles. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|