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• W4241377250 abstract "High genetic diversity and significant population structure of Vachellia tortilis population in Kenya has been determined using nuclear microsatellite markers. Despite wide distribution and long-distance gene dispersal of the species, geographic barriers affect its gene flow patterns. The Gregorian Rift Valley that cuts across the country is suggested to have differentiated the populations into eastern and western clusters. Vachellia tortilis is an important dryland tree species valued for fuelwood and fodder production; however, no strategy has been put in place for sustainable management of the species genetic resources. Furthermore, there is inadequate information on the species population genetics to aid the development of such strategies. We evaluated the amount and structure of neutral genetic diversity of V. tortilis population in Kenya and provided recommendations necessary for improvement and conservation of the species genetic resources. We hypothesized that the current genetic diversity of V. tortilis is high because of its demographic history and that no population structuring was expected to occur due to the presumed long-distance and effective gene flow patterns within the species. Leaf tissues were collected from 15 putative natural populations of V. tortilis covering the whole distribution range in Kenya. DNA was isolated from the leaf tissues and analyzed using microsatellite markers. In total, 450 trees were genotyped using ten polymorphic nuclear microsatellite loci, and genetic diversity and population structure parameters were determined. We found high levels of genetic diversity within the populations with a mean gene diversity at 0.85. However, significant population differentiation was evident (FST = 0.026, P = 0.007; RST = 0.032, P = 0.004) despite a large number of migrants per generation (Nm = 5.3). Population structure detected suggests the presence of two clusters, although many individuals showed mixed ancestry. The groups reflect the influence of geographic patterns and historical population gene flow. There exists high genetic diversity in V. tortilis in Kenya with significant population structuring into two clusters. We recommend the consideration of the two distinct groups in the development of the species improvement, breeding, and conservation programs. Such programs should ensure maintenance of the majority of the extant genetic diversity." @default.
• W4241377250 created "2022-05-12" @default.
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• W4241377250 date "2019-04-30" @default.
• W4241377250 modified "2023-10-16" @default.
• W4241377250 title "Evidence of high genetic diversity and significant population structuring in Vachellia tortilis (Forsk.) Galasso & Banfi population in Kenya" @default.
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• W4241377250 doi "https://doi.org/10.1007/s13595-019-0834-y" @default.
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