Invasion ofBactrocera dorsalis(Hendel) (Diptera: Tephritidae): Population structure and invasion routes for southern Africa

2016 ◽  
Author(s):  
Minette Karsten
Keyword(s):  
Population Structure ◽  
Southern Africa ◽  
Invasion Routes

scholarly journals Fine-Scale Human Population Structure in Southern Africa Reflects Ecogeographic Boundaries

Genetics ◽  
2016 ◽  
Vol 204 (1) ◽  
pp. 303-314 ◽  
Author(s):  
Caitlin Uren ◽  
Minju Kim ◽  
Alicia R. Martin ◽  
Dean Bobo ◽  
Christopher R. Gignoux ◽  
...  
Keyword(s):  
Population Structure ◽  
Southern Africa ◽  
Human Population ◽  
Fine Scale

scholarly journals Population structure and genetic diversity analyses of common bean germplasm collections of East and Southern Africa using morphological traits and high-density SNP markers

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0243238
Author(s):  
Wilson Nkhata ◽  
Hussein Shimelis ◽  
Rob Melis ◽  
Rowland Chirwa ◽  
Tenyson Mzengeza ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Genetic Variation ◽  
Common Bean ◽  
Southern Africa ◽  
Crop Improvement ◽  
Phenotypic Expression ◽  
Snp Markers ◽  
High Yield ◽  
Gene Pools

Knowledge of genetic diversity in plant germplasm and the relationship between genetic factors and phenotypic expression is vital for crop improvement. This study's objectives were to understand the extent of genetic diversity and population structure in 60 common bean genotypes from East and Southern Africa. The common bean genotypes exhibited significant (p<0.05) levels of variability for traits such as days to flowering (DTF), days to maturity (DTM), number of pods per plant (NPP), number of seeds per pod (NSP), and grain yield per hectare in kilograms (GYD). About 47.82 per cent of the variation among the genotypes was explained by seven principal components (PC) associated with the following agronomic traits: NPP, NFF (nodes to first flower), DTF, GH (growth habit) and GYD. The SNP markers revealed mean gene diversity and polymorphic information content values of 0.38 and 0.25, respectively, which suggested the presence of considerable genetic variation among the assessed genotypes. Analysis of molecular variance showed that 51% of the genetic variation were between the gene pools, while 49% of the variation were within the gene pools. The genotypes were delineated into two distinct groups through the population structure, cluster and phylogenetic analyses. Genetically divergent genotypes such as DRK57, MW3915, NUA59, and VTTT924/4-4 with high yield and agronomic potential were identified, which may be useful for common bean improvement.

scholarly journals Geographical distribution and population structure of springbok Antidorcas marsupialis rumen protozoa in southern Africa

Koedoe ◽  
1976 ◽  
Vol 19 (1) ◽  
Author(s):  
R. C. Wilkinson ◽  
W. Van Hoven
Keyword(s):  
Population Structure ◽  
West Africa ◽  
Protein Content ◽  
Southern Africa ◽  
National Park ◽  
Protein Concentration ◽  
Rumen Fluid ◽  
South West ◽  
South West Africa ◽  
Single Genus

Springbok were sampled in Angola, South West Africa, Kalahari Gemsbok National Park, the Cape Province and Eastern Transvaal between July 1973 and July 1974. All the ciliates found in the 20 rumens investigated belonged to a single genus Entodinium (family Ophryoscolecidae) and they varied in number from 0,3 x 106 to 2,5 x 106 per cm3 of rumen fluid. The different species were found and a positive correlation is seen between total numbers and protein content of the feed. It has been concluded that the numbers of E. par-uum are closely related to the protein concentration of the feed.

scholarly journals Fine-scale human population structure in southern Africa reflects ecogeographic boundaries

2017 ◽  
Author(s):  
Caitlin Uren ◽  
Minju Kim ◽  
Alicia R. Martin ◽  
Dean Bobo ◽  
Christopher R. Gignoux ◽  
...  
Keyword(s):  
Population Structure ◽  
Southern Africa ◽  
Population History ◽  
Eastern Africa ◽  
Fine Scale ◽  
Kalahari Desert ◽  
African Populations ◽  
Scale Population ◽  
Genetic Impact ◽  
Northern Cape

AbstractRecent genetic studies have established that the KhoeSan populations of southern Africa are distinct from all other African populations and have remained largely isolated during human prehistory until about 2,000 years ago. Dozens of different KhoeSan groups exist, belonging to three different language families, but very little is known about their population history. We examine new genome-wide polymorphism data and whole mitochondrial genomes for more than one hundred South Africans from the ≠Khomani San and Nama populations of the Northern Cape, analyzed in conjunction with 19 additional southern African populations. Our analyses reveal fine-scale population structure in and around the Kalahari Desert. Surprisingly, this structure does not always correspond to linguistic or subsistence categories as previously suggested, but rather reflects the role of geographic barriers and the ecology of the greater Kalahari Basin. Regardless of subsistence strategy, the indigenous Khoe-speaking Nama pastoralists and the N|u-speaking ≠Khomani (formerly hunter-gatherers) share ancestry with other Khoe-speaking forager populations that form a rim around the Kalahari Desert. We reconstruct earlier migration patterns and estimate that the southern Kalahari populations were among the last to experience gene flow from Bantu-speakers, approximately 14 generations ago. We conclude that local adoption of pastoralism, at least by the Nama, appears to have been primarily a cultural process with limited genetic impact from eastern Africa.Data depositionData files are freely available on the Henn Lab website: http://ecoevo.stonybrook.edu/hennlab/data-software/SummaryDistinct, spatially organized ancestries demonstrate fine-scale population structure in southern Africa, implying a more complex history of the KhoeSan than previously thought. Southern KhoeSan ancestry in the Nama and ≠Khomani is shared in a rim around the Kalahari Desert. We hypothesize that there was recent migration of pastoralists from East Africa into southern Africa, independent of the Bantu-expansion, but the spread of pastoralism within southern Africa occurred largely by cultural diffusion.

scholarly journals Population structure and infectious disease risk in southern Africa

2017 ◽  
Vol 292 (3) ◽  
pp. 499-509 ◽  
Author(s):  
Caitlin Uren ◽  
Marlo Möller ◽  
Paul D. van Helden ◽  
Brenna M. Henn ◽  
Eileen G. Hoal
Keyword(s):  
Infectious Disease ◽  
Population Structure ◽  
Southern Africa ◽  
Disease Risk
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