Results 161 to 170 of about 81,508 (349)

Population genomics of sub-Saharan Drosophila melanogaster: African diversity and non-African admixture [PDF]

arXiv, 2012
(ABRIDGED) We report the genome sequencing of 139 wild-derived strains of D. melanogaster, representing 22 population samples from the sub-Saharan ancestral range of this species, along with one European population. Most genomes were sequenced above 25X depth from haploid embryos. Results indicated a pervasive influence of non-African admixture in many
arxiv  

Genomic Footprints of Ancient Multi‐Species Introgression Events Among Allopatric Australo‐Papuan Butcherbird Species

Journal of Biogeography, EarlyView.
ABSTRACT Aim Climate change has influenced the evolution of the world's biota, shaping species distributions, promoting diversification and causing extinctions. The turbulent climatic oscillations of the Pleistocene, which caused repeated periods of isolation and secondary contact, have left lasting signatures on the genomes of species across the world.
Anna M. Kearns, Heather Johnston, Jessica Fenker, James Nicholls, Claire Yang, Andreas Zwick, Bulisa Iova, Ian J. Mason, Alex Drew, Leo Joseph   +9 more
wiley   +1 more source

Molecular identification of natural hybridization between Melastoma malabathricum and Melastoama beccarianum in Sarawak, Malaysia

Ecology and Evolution, 2019
Hybridization is very common in flowering plants and it plays a significant role in plant evolution and adaptation. Melastoma L. (Melastomataceae) comprises about 80–90 species in tropical Asia and Oceania, among which 41 species occur in Borneo. Natural
Renzhi Wu, Peishan Zou, Guangwen Tan, Zhenyang Hu, Yongqi Wang, Zulin Ning, Wei Wu, Ying Liu, Shaoyun He, Renchao Zhou   +9 more
doaj   +1 more source

So Young, So Rich: Habitat Shifts Combined With Trait Evolution Promoted Species Radiation in Senecio in the Andes

Journal of Biogeography, EarlyView.
ABSTRACT Aim The outstanding Andean biodiversity has been linked to the occurrence of evolutionary radiations that are common among high‐elevation plant lineages. One of the most iconic examples is found in the species‐rich genus Senecio, with an impressive variation in growth forms and habitat preference.
Luciana Salomón, Juan Manuel Gorospe, Tomáš Fér, Filip Kolař, Petr Sklenář, Roswitha Schmickl   +5 more
wiley   +1 more source

Significant genomic introgression from grey junglefowl (Gallus sonneratii) to domestic chickens (Gallus gallus domesticus)

Journal of Animal Science and Biotechnology
Background Chicken is one of the most numerous and widely distributed species around the world, and many studies support the multiple ancestral origins of domestic chickens. The research regarding the yellow skin phenotype in domestic chickens (regulated
Xiurong Zhao, Junhui Wen, Xinye Zhang, Jinxin Zhang, Tao Zhu, Huie Wang, Weifang Yang, Guomin Cao, Wenjie Xiong, Yong Liu, Changqing Qu, Zhonghua Ning, Lujiang Qu   +12 more
doaj   +1 more source

Expanded Distance-based Phylogenetic Analyses of Fossil Homo Skull Shape Evolution [PDF]

arXiv, 2015
Analyses of a set of 47 fossil and 4 modern skulls using phylogenetic geometric morphometric methods corroborate and refine earlier results. These include evidence that the African Iwo Eleru skull, only about 12,000 years old, indeed represents a new species of near human.
arxiv  

Introgression of trypanotolerance genes

Trypanosomosis is the most widespread parasitic disease of great importance in Africa affecting human and animals. There are breeds of cattle that are trypanotolerant. Trypanotolerance is an ability of these breeds to withstand the effects of trypanosome infections. The disease impedes production in Sub-Saharan Africa. In this thesis, the main focus is
openaire   +1 more source

Reproductive Isolation and Introgression between Notropis cornutus and Notropis chrysocephalus (Family Cyprinidae): Comparison of Morphology, Allozymes, and Mitochondrial DNA [PDF]

, 1989
Thomas E. Dowling, Gerald R. Smith, Wesley M. Brown   +2 more
openalex   +1 more source

Origin, Divergence and Migration Routes of Psyllids of the Cacopsylla pruni Complex (Hemiptera: Psylloidea) Inferred by Approximate Bayesian Computation Methods

Journal of Biogeography, EarlyView.
ABSTRACT Aim Population genetics is essential to decipher the evolutionary history of pests and insect vectors from both a theoretical point of view and to predict and mitigate the future of epidemics. We attempt to shed light on the evolutionary history and phylogeography of two cryptic psyllid species (namely, A and B) of the Cacopsylla pruni complex,
Margaux Darnis, Virginie Ravigné, Nicolas Sauvion   +2 more
wiley   +1 more source

The expected neutral frequency spectrum of linked sites [PDF]

arXiv, 2016
We present an exact, closed expression for the expected neutral Site Frequency Spectrum for two neutral sites, 2-SFS, without recombination. This spectrum is the immediate extension of the well known single site $\theta/f$ neutral SFS. Similar formulae are also provided for the case of the expected SFS of sites that are linked to a focal neutral ...
arxiv