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Publication Type J
Authors Shuyskaya, E., K. Toderich, L. Gismatullina, T. Rajabov and S. Khohlov
Title Genetic diversity of two annual Salsola species (Chenopodiaceae) among habitat types in desert plant communities
Source Biologia
Author Keywords genetic diversity halophytes isozymes natural selection salinity water deficit Central Asia allozyme polymorphisms nitrogen-metabolism festuca-ovina populations differentiation halophytes diversification heterozygosity conservation associations
Abstract Desert annual plant species are valuable pasture forage and sources for restoration of degraded pastures. Examining the impact of environmental stresses on genetic diversity and population structure can identify species populations suitable for habitat restoration. We examined allozyme diversity and population structure of two annual species, halo-xerophyte Salsola incanescens and xero-halophyte S. paulsenii, in association with the type of desert plant community, which reflects the water-salt conditions in the soil. We sampled 19 wild populations in 15 xerophytic, xero-halophytic and halophytic plant communities in Kyzylkum desert (Uzbekistan, Central Asia). The species studied had low genetic variability (P-95 = 0.05-0.10, H-O = 0.008-0.025) and high population structure (F-ST = 0.585-0.739). Wright's fixation index indicated deviations from Hardy-Weinberg equilibrium with a deficit of heterozygotes (F-IS = 0.79) in S. incanescens populations. No evidence of isolation by distance was found for the species studied (Mantel's r = 0.02-0.04). Estimates of genetic variability in populations from xerophytic and halophytic plant communities differed significantly (2- to 10-fold, P < 0.05) for both species. Moreover, allele-habitat associations at the GOT and Me loci were found in both species. Decreased levels of within-population variability were found in both species in halophytic communities. In sub-optimal habitats, the decline in genetic differentiation and increase in gene flow were found for bothS. incanescens (xerophytic plant communities) and S. paulsenii (halophytic communities). Our results indicate that genetic diversity rather than population differentiation is affected by the habitat type.
ISSN 0006-3088
ISBN 0006-3088
29-Character Source Abbreviation Biologia
Publication Date Mar
Year Published 2017
Volume 72
Issue 3
Beginning Page 267-276
Digital Object Identifier (DOI) 10.1515/biolog-2017-0032
Unique Article Identifier WOS:000399904300004
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