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1,598 results for “genetic diversity”
FIGURE 2 in Population Structure and Genetic Diversity in Delphinium (Ranunculaceae) Using Scot Molecular Markers
FIGURE 2: PCA plot of morphological characters revealing species delimitation in the Delphinium species; sp1= D. teheranicum; sp2= D. camptocarpum; sp3= D. lorestanicum; sp4= D. leptocarpum; sp5= D. persicum; sp 6= D. aucheri; sp7= D. anthoroideum; sp8= D. hohenackeri; sp9= D. stocksianum; sp10: D. rugulosum; sp11: D. ambiguum; sp12= D. ajacis; sp13= D. consolida; sp14= D. oliverianum; sp15= D. flavum; sp16= D. trigonelloides; sp17= D. oliganthum; sp18= D. linarioides; sp19= D. paradoxum.
FIGURE. 1 in Population Structure and Genetic Diversity in Delphinium (Ranunculaceae) Using Scot Molecular Markers
FIGURE. 1. Map of Iran shows the collection sites and provinces where Delphinium species were obtained for this study; sp1= D. teheranicum; sp2= D. camptocarpum; sp3= D. lorestanicum; sp4= D. leptocarpum; sp5= D. persicum; sp 6= D. aucheri; sp7= D. anthoroideum; sp8= D. hohenackeri; sp9= D. stocksianum; sp10: D. rugulosum; sp11: D. ambiguum; sp12= D. ajacis; sp13= D. consolida
Interspecific hybridization and island colonization history, not rarity, most strongly affect the genetic diversity in a clade of Mascarene-endemic trees
<p>Many factors shape the genetic diversity of island-endemic trees, with important implications for conservation. Oceanic island-endemic lineages undergo an initial founding bottleneck during the colonization process and subsequently accumulate diversity following colonization. Moreover, many island endemics occur in small populations and are further threatened by anthropogenic factors that cause population declines, making them susceptible to losses in genetic diversity through genetic drift, inbreeding, and bottlenecks. <a name="_Hlk80963234"></a>However, life-history traits commonly found in trees, such as outcrossing mechanisms, long lifespans, and a propensity for interspecific hybridization, may help buffer against losses of genetic variation. To assess the relative importance of colonization history, rarity, and distribution in shaping genetic diversity of island-endemic trees, we conducted a<a name="_Hlk80964566"></a> comparative population genomic analysis of 13 species of <em>Diospyros</em> (Ebenaceae) endemic to the Mascarene Islands that differ in island colonization history, distribution, population size, and IUCN threat status. We genotyped 328 individuals across the islands using 2b-RADseq, compared genetic diversity both among and within species, and assessed patterns of genetic structure. <a name="_Hlk80965008"></a>Genetic diversity did not vary significantly by IUCN status, but we found that species that co-occur with others on the same intermediate-aged island (Mauritius) had much greater genetic diversity than those that occur solitarily on an island (Réunion and Rodrigues), likely because of greater interspecific hybridization among species with overlapping distributions and processes related to time since island colonization. Results presented here were used to <a name="_Hlk80991503"></a>determine priority localities for <em>in situ</em> and <em>ex situ</em> conservation efforts to maximize the genetic diversity of each Mascarene <em>Diospyros</em> species.</p>
Holocene climate changes explain the spatial pattern in genetic diversity in populations of Cyperus papyrus from Southeast Africa wetlands
<p>Wetlands are one of the most threatened ecosystems in the world because more than 70% of the area worldwide has been lost since 1900. Wetland plant species rely greatly on water for seeds and propagules, which may lead to a downstream unidirectional dispersal and accumulation of genetic diversity downstream. However, several species show no support for unidirectional genetic diversity, revealing the complexity of population dynamics and gene flow in wetlands. Here, we used microsatellite loci to address how the past demographic dynamics shaped the contemporary spatial pattern in genetic diversity and population structure of <em>Cyperus papyrus</em> in wetlands of Southeast Africa. Using spatially explicit analysis and coalescent modelling we found no support for unidirectional dispersal. Instead, we found higher genetic diversity in populations upstream than downstream in the river basin. We also found high admixture among populations, most likely due to connections between adjacent river basins during sporadic floods, and ongoing gene flow due to bird-mediated seed dispersal. Our results suggest stepping-stone migration due to strong isolation-by-distance, but not necessarily unidirectional. Moreover, the past demographic dynamics in the Holocene shaped the current pattern of genetic diversity and structure, leading to higher genetic diversity in populations upstream of the Zambezi river basin. Our results also point to the very low genetic diversity of <em>C</em>. <em>papyrus</em> populations in Southeast Africa and the need for management and conservation strategies to guarantee the long-term persistence of the species in the region.</p>
FIGURE 4 in Genetic diversity of the regionally endangered Chinese ricefish (Oryzias sinensis) in Taiwan, with comments on its conservation status
FIGURE 4. Molecular phylogenetic tree of Chinese ricefish in Taiwan based on combined COI and D-loop sequences constructed with the maximum likelihood method. Bootstrap values less than 50 are not shown.
FIGURE 2 in Genetic diversity of the regionally endangered Chinese ricefish (Oryzias sinensis) in Taiwan, with comments on its conservation status
FIGURE 2. Molecular phylogenetic tree of Chinese ricefish in Taiwan based on the D-loop sequence constructed with the maximum likelihood method (bootstrap values less than 50 not shown). The sample size of each haplotype is given in parentheses after the OTU. Haplotypes from Tzeng et al. (2006) are shown with GenBank accession numbers.
FIGURE 1 in Genetic diversity of the regionally endangered Chinese ricefish (Oryzias sinensis) in Taiwan, with comments on its conservation status
FIGURE 1. Sampling sites in northern Taiwan. Detailed localities and rivers are shown in the upper right image.
FIGRUE 3 in Genetic diversity of the regionally endangered Chinese ricefish (Oryzias sinensis) in Taiwan, with comments on its conservation status
FIGRUE 3. Molecular phylogenetic tree of Chinese ricefish in Taiwan based on COI sequences constructed with the maximum likelihood method. Bootstrap values less than 50 are not shown. Two haplotypes of Chinese ricefish from South Korea from Kim et al. (unpublished data, 2016) are shown with GenBank accession numbers.
Figure 3 in Cryptic lineages, cryptic barriers: historical seascapes and oceanic fronts drive genetic diversity in supralittoral rockpool beetles (Coleoptera: Hydraenidae)
Figure 3. Haplotype networks for COI and wingless for Ochthebius (Ochthebius) quadricollis. Colours represent the main geographic areas indicated in the legend.
Figure 2. Calibrated phylogenetic tree obtained with BEAST v.1.10.4 in Cryptic lineages, cryptic barriers: historical seascapes and oceanic fronts drive genetic diversity in supralittoral rockpool beetles (Coleoptera: Hydraenidae)
Figure 2. Calibrated phylogenetic tree obtained with BEAST v.1.10.4 of Ochthebius with focus on subgenus Cobalius (purple shade) and quadricollis species group (green shade) (former subgenus 'Calobius'). Numbers at nodes represent posterior probabilities, and 95% highest posterior density are given in blue horizontal rectangles. Calibrations points used in analysis are specified by grey dots.
Figure 5 in Cryptic lineages, cryptic barriers: historical seascapes and oceanic fronts drive genetic diversity in supralittoral rockpool beetles (Coleoptera: Hydraenidae)
Figure 5. Haplotype networks for COI and wingless for Ochthebius (Cobalius) lejolisii. Colours represent the main geographic areas indicated in the legend.
Figure 1 in Cryptic lineages, cryptic barriers: historical seascapes and oceanic fronts drive genetic diversity in supralittoral rockpool beetles (Coleoptera: Hydraenidae)
Figure 1. Distribution of sampling localities 1-57 (as listed in Table 1) and main surface marine currents and potential geographic barriers to dispersal (inset top-right).
Figure 4 in Cryptic lineages, cryptic barriers: historical seascapes and oceanic fronts drive genetic diversity in supralittoral rockpool beetles (Coleoptera: Hydraenidae)
Figure 4. Haplotype networks for COI and wingless for Ochthebius (Cobalius) subinteger. Colours represent the main geographic areas indicated in the legend.
FIGURE 31 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURE 31. The ML tree showing unique base changes per phylogroups of Bolua, obtained by maximum parsimony analysis (the base position indicates by the position number in the concatenated matrix)
FIGURES 28–30 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURES 28–30. Song in Bolua (28—B. balikesirensis from Balıkesir; 29—and 30—B. bursaensis from Bursa and Kütahya, respectively; A, B and C show song at three different time scale)
FIGURES 18–26. 18–20 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURES 18–26. 18–20. Female head+pronotum+tegmina in Bolua (18—B. turkiyae, 19—B. balıkesirensis, 20—B. bursaensis; D—dorsal view, L—lateral view). 21–23. Female subgenital plate in Bolua (21—B. turkiyae, 22—B. balıkesirensis, 23—B. bursaensis; V—ventral view, L-lateral view). 24–26. Ovipositor in Bolua (24—B. turkiyae, 25—B. balıkesirensis, 26— B. bursaensis)
FIGURE 2 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURE 2. Phylogenetic tree, chronogram and taxonomic pattern obtained from the matrix constituted by concatenation of COI+NAD2+VAL+ITS sequences. The bootstrap (ML)/ posterior probability (BI) supports to the node are given above the node and the time to the most recent common ancestor (TMRCA) and the 95% HPD as million years below the node. The results from the species delimitation test are indicated by a bar line.
FIGURE 27 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURE 27. The PCA plots and trait contribution prepared from the metric data sets of male and female individuals belonging to Bolua
FIGURE 1 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURE 1. Distribution of Bolua [for detail of the localities see material examined per species; Bolu(1), Kastamonu (2,3,4, 6), Karabük (5), Çankırı (7), Balıkesir (8), Bursa (9, 10), Kütahya (11) and Kocaeli (12, 13)]
FIGURES 3–17. 3–5 in Anatolian endemic genus Bolua (Orthoptera: Tettigoniidae: Tettigoniinae): genetic and phenotypic data indicate inconsistent diversity and evolutionary patterns
FIGURES 3–17. 3–5. Male head+pronotum+tegmina in Bolua (3—B. turkiyae, 4—B. balıkesirensis, 5—B. bursaensis; D— dorsal view, L—lateral view). 6–8. Male anal tergite in Bolua (6—B. turkiyae, 7—B. balıkesirensis, 8—B. bursaensis). 9–11. Male cercus in Bolua (9—B. turkiyae, 10—B. balıkesirensis, 11—B. bursaensis). 12–14. Male subgenital plate in Bolua (12—B. turkiyae, 13—B. balıkesirensis, 14—B. bursaensis). 15–17. Titillators in Bolua (15—B. turkiyae, 16—B. balıkesirensis, 17—B. bursaensis)
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.