Results 41 to 50 of about 47,945 (287)

Combining morphological and genomic evidence to resolve species diversity and study speciation processes of the Pallenopsis patagonica (Pycnogonida) species complex

open access: yesFrontiers in Zoology, 2019
Background Pallenopsis patagonica (Hoek, 1881) is a morphologically and genetically variable sea spider species whose taxonomic classification is challenging.
Jana S. Dömel   +8 more
doaj   +1 more source

Annotated check-list of Pteromalidae (Hymenoptera: Chalcidoidea) of Morocco. Part II.

open access: yesGraellsia, 2021
En esta segunda parte, presentamos la subfamilia Pteromalinae en Marruecos, que incluye 86 especies pertenecientes a 50 géneros. Quince géneros y 37 especies se enumeran por primera vez en la fauna marroquí, de las cuales 9 han sido recientemente ...
Khadija Kissayi   +2 more
doaj   +1 more source

Tangent Phylogenetic PCA

open access: yes, 2023
Phylogenetic PCA (p-PCA) is a version of PCA for observations that are leaf nodes of a phylogenetic tree. P-PCA accounts for the fact that such observations are not independent, due to shared evolutionary history. The method works on Euclidean data, but in evolutionary biology there is a need for applying it to data on manifolds, particularly shapes ...
Morten Akhøj   +2 more
openaire   +4 more sources

Phylogenetics and rank of matrices [PDF]

open access: yes, 2014
Phylogenetics is the study of the evolutionary relationships of a group of species, and it is usually inferred from the DNA sequences of a set of living species.
Garrote López, Marina
core   +1 more source

Uprooted Phylogenetic Networks [PDF]

open access: yesBulletin of Mathematical Biology, 2017
The need for structures capable of accommodating complex evolutionary signals such as those found in, for example, wheat has fueled research into phylogenetic networks. Such structures generalize the standard model of a phylogenetic tree by also allowing for cycles and have been introduced in rooted and unrooted form.
Gambette, Philippe   +2 more
openaire   +6 more sources

The effects of fossil taxa, hypothetical predicted ancestors, and a molecular scaffold on pseudoextinction analyses of extant placental orders.

open access: yesPLoS ONE, 2021
Pseudoextinction analyses, which simulate extinction in extant taxa, use molecular phylogenetics to assess the accuracy of morphological phylogenetics. Previous pseudoextinction analyses have shown a failure of morphological phylogenetics to place some ...
Peggy L Brady, Mark S Springer
doaj   +1 more source

Molecular phylogenetics of Neotropical detritivorous fishes of the family Curimatidae (Teleostei: Characiformes)

open access: yes, 2018
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)NSFProcesso FAPESP: 2011/08374-1Processo FAPESP: 2013/16436-2Processo FAPESP: 2014/26508-3Processo FAPESP: 2016/11313-8NSF: DEB-1257898Curimatidae, the fourth largest family of detritivorous ...
Brian L. Sidlauskas   +13 more
core   +1 more source

From mice to humans—divergent strategies for intestinal homeostasis and regeneration

open access: yesFEBS Letters, EarlyView.
Recent advances such as organoid genome editing, xenotransplantation, imaging, and whole‐genome sequencing have enabled direct studies of human intestinal stem cells (ISCs). These studies reveal species‐specific features, including slower ISC proliferation, distinct injury responses, slower somatic mutation accumulation in humans, and an inverse ...
Keiko Ishikawa   +2 more
wiley   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

Positive selection and relaxed purifying selection contribute to rapid evolution of sex-biased genes in green seaweed Ulva

open access: yesBMC Ecology and Evolution
Background The evolution of differences in gamete size and number between sexes is a cornerstone of sexual selection theories. The green macroalga Ulva, with incipient anisogamy and parthenogenetic gametes, provides a unique system to investigate ...
Xiaojie Liu   +6 more
doaj   +1 more source

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