Genetic differentiation of black saxaul, Haloxylon aphyllum (Chenopodiaceae), along a soil salinity gradient in the Kyzylkum Desert
E. V. ShuyskayaK.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul. 35, Moscow, 127276, RussiaLilya G. GismatullinaIntegrated Research Institute of Regional Problems, Samarkand Branch, Uzbekistan Academy of Sciences, ul. T. Malik 3, Samarkand, 140100, UzbekistanKristina ToderichIntegrated Research Institute of Regional Problems, Samarkand Branch, Uzbekistan Academy of Sciences, ul. T. Malik 3, Samarkand, 140100, UzbekistanP. Yu. VoroninK.A. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul. 35, Moscow, 127276, RussiaNatalia V. SoldatovaDjeiran Ecological Center, Kagan, Bukhara Region, 200700, Uzbekistan
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Аннотация
Populations of Haloxylon àphyllum in the Kyzylkum Desert have been found to be markedly deficient in heterozygotes at a medium level of genetic diversity (P 95 = 0.56, A = 1.67, H o = 0.14, H e = 0.28). Spatial genetic differentiation of these populations have been revealed along a soil salinity gradient (from 0 to 0.5 mmol Na+/g), with their genetic diversity reaching a maximum (H o = 0.21–0.25, H e = 0.25–0.27) in areas with a moderate salinity level (0.05–0.1 mmol Na+/g). Locus Got-2 can serve as a marker of this differentiation (FstGot-2 = 0.4).
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