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54 results for “genetic clades”
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>
Supp. Info. and Data for Forensic analysis of novel SARS2r-CoV identified in game animal datasets in China shows evolutionary relationship to Pangolin GX CoV clade and apparent genetic experimentation
<p>Supplementary Info. and Data to accompany: Forensic analysis of novel SARS2r-CoV identified in game animal datasets in China shows evolutionary relationship to Pangolin GX CoV clade and apparent genetic experimentation</p> <p>Supp_Info_2.xlsx</p> <p>Supp_Info_3.xlsx</p> <p>Supp. Data:</p> <p>Novel GX_ZC45r-CoV genome: GX_ZC45r-CoV.fa</p> <p>Gap filled GX_ZC45r-CoV genome: GX_ZC45-CoV_ZC45_gap_filled_no_polyA.fa</p> <p>Read alignments to gap filled GX_ZC45r-CoV genome using minimap2: GX_ZC45-CoV_ZC45_gap_filled_no_polyA_minimap2_16_SRA.sam</p> <p> </p>
Data from: Testing the link between population genetic differentiation and clade diversification in Costa Rican orchids
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Interspecific hybridization and island colonization history, not rarity, most strongly affect the genetic diversity in a clade of Mascarene-endemic trees
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Intraspecific genetic variation underlying postmating reproductive barriers between species in the wild tomato clade (Solanum sect. Lycopersicon)
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Data from: Genetic diversity is largely unpredictable but scales with museum occurrences in a species-rich clade of Australian lizards
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Data from: Genetic introgression among differentiated clades is lower among clades exhibiting different parity modes
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Figure 2 from: Krapp-Schickel T (2018) Leucothoe vaderotti, a new Atlantic Leucothoe (Crustacea, Amphipoda) belonging to the "spinicarpa-clade" (Crustacea, Amphipoda). ). In: Brix S, Lörz A-N, Stransky B, Svavarsson J (Eds) Amphipoda from the IceAGE-project (Icelandic marine Animals: Genetics and Ecology). ZooKeys 731: 135-144. https://doi.org/10.3897/zookeys.731.19813
Figure 2 Leucothoe vaderotti sp. n. Mxp maxilliped P 3, P 4, P 5, P 7 peraeopods Ep 2, Ep 3 epimeral plates Us urosome with epimeral plates, uropods and telson Us 1, Us 2 other urosomites U 1, U 2, U 3 uropods T telson.
Figure 1 from: Krapp-Schickel T (2018) Leucothoe vaderotti, a new Atlantic Leucothoe (Crustacea, Amphipoda) belonging to the "spinicarpa-clade" (Crustacea, Amphipoda). ). In: Brix S, Lörz A-N, Stransky B, Svavarsson J (Eds) Amphipoda from the IceAGE-project (Icelandic marine Animals: Genetics and Ecology). ZooKeys 731: 135-144. https://doi.org/10.3897/zookeys.731.19813
Figure 1 Leucothoe vaderotti sp. n. A 1, A 2 antennae Mx 1, Mx 2 maxillae Gn 1, Gn 2 gnathopods Gn 1', Gn 2' gnathopods enlarged.
Data from: Cis- and trans-acting genetic factors contribute to heterogeneity in the rate of crossing over between the Drosophila simulans clade species
In the genus Drosophila, variation in recombination rates has been found within and between species. Genetic variation for both cis- and trans-acting factors has been shown to affect recombination rates within species, but little is known about the genetic factors that affect differences between species. Here we estimate rates of crossing over for seven segments that tile across the euchromatic length of the X chromosome in the genetic backgrounds of three closely related Drosophila species. We first generated a set of Drosophila mauritiana lines each having two semi-dominant visible markers on the X chromosome and then introgressed these doubly marked segments into the genetic backgrounds of its sibling species, D. simulans and D. sechellia. Using these 21 lines (7 segments, 3 genetic backgrounds) we tested whether recombination rates within the doubly marked intervals differed depending on genetic background. We find significant heterogeneity among intervals and among species backgrounds. Our results suggest that a combination of both cis- and trans-acting factors have evolved among the three D. simulans clade species and interact to affect recombination rate.
Fig. 29 in Morphology and taxonomic assessment of eight genetic clades of Mercuria Boeters, 1971 (Caenogastropoda, Hydrobiidae), with the description of five new species
Fig. 29. Shells and operculum of Mercuria veronicae Miller, Khalloufi & Delicado sp. nov. A–B. Holotype (MNCN 15.05/200124H), frontal and lateral views. C–D. Paratypes. C. MNCN 15.05/200124P. D. UGSB 17271. A–D, G–H. El Waha Spring, Oasis Waterfall, Tamerza, Tozeur. E–F. Lekbir Spring, Big Waterfall, Tamerza, Tozeur. G. Operculum, inner side. H. Operculum, outer side.
Fig. 12 in Morphology and taxonomic assessment of eight genetic clades of Mercuria Boeters, 1971 (Caenogastropoda, Hydrobiidae), with the description of five new species
Fig. 12. Protoconch and radula of Mercuria balearica (Paladilhe, 1869). A–C. Venta El Pilar Spring, Málaga, Spain. A. Details of the protoconch. B. Details of the protoconch nucleus. C. Protoconch microsculpture. D–F. Stream at Sant Joan de Carbonell, Minorca. D. Overview of radular teeth rows. E. Rows of lateral and inner marginal radular teeth. F. Detailed view of the outer marginal teeth.
Data from: Cis- and trans-acting genetic factors contribute to heterogeneity in the rate of crossing over between the Drosophila simulans clade species
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Whole genome transcriptome analysis of Group A Streptococcus (Streptococcus pyogenes) isolates from the three distinct genetic clades of M89 population
GEO Series GSE76816. Streptococcus pyogenes. 36 samples. Type: Expression profiling by high throughput sequencing.
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Allen Brain Atlas
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