Results 41 to 50 of about 66,141 (268)

Comparative Chloroplast Genomes of Nicotiana Species (Solanaceae): Insights Into the Genetic Variation, Phylogenetic Relationship, and Polyploid Speciation

open access: yesFrontiers in Plant Science, 2022
Nicotiana L. is a genus rich in polyploidy, which represents an ideal natural system for investigating speciation, biodiversity, and phytogeography.
Shuaibin Wang   +7 more
doaj   +1 more source

Molecular and morphological clocks for estimating evolutionary divergence times [PDF]

open access: yesBMC Ecology and Evolution, 2020
Abstract Background: Matrices of morphological characters are frequently used for dating species divergence times in systematics. In some studies, morphological and molecular character data from living taxa are combined, whereas others use morphological characters from extinct taxa as well.
Jose Barba-Montoya   +2 more
openaire   +5 more sources

Time-calibrated phylogeny for phlebotomine sand flies based on the Fossilized Birth-Death process and the inclusion of divergence time estimation of each node, considering the Maximum Clade Credibility (MCC) tree.

open access: yes, 2023
Time-calibrated phylogeny for phlebotomine sand flies based on the Fossilized Birth-Death process and the inclusion of divergence time estimation of each node, considering the Maximum Clade Credibility (MCC) tree.
Jesús A. Díaz-Cruz (16469351)   +10 more
core   +1 more source

A Mitochondrial Genome Phylogeny of Cleridae (Coleoptera, Cleroidea)

open access: yesInsects, 2022
The predaceous beetle family Cleridae includes a large and widely distributed rapid radiation, which is vital for the ecosystem. Despite its important role, a number of problems remain to be solved regarding the phylogenetic inter-relationships, the ...
Lilan Yuan   +5 more
doaj   +1 more source

Divergence Time and Evolutionary Rate Estimation with Multilocus Data [PDF]

open access: yesSystematic Biology, 2002
Bayesian methods for estimating evolutionary divergence times are extended to multigene data sets, and a technique is described for detecting correlated changes in evolutionary rates among genes. Simulations are employed to explore the effect of multigene data on divergence time estimation, and the methodology is illustrated with a previously published
Jeffrey L, Thorne, Hirohisa, Kishino
openaire   +2 more sources

Improved Multiple-Model Adaptive Estimation Method for Integrated Navigation with Time-Varying Noise

open access: yesSensors, 2022
The accurate noise parameter is essential for the Kalman filter to obtain optimal estimates. However, problems such as variations in the noise environment and measurement anomalies can cause degradation of estimation accuracy or even divergence.
Jinhao Song   +6 more
doaj   +1 more source

Molecular Dating of the Emergence of Anaerobic Rumen Fungi and the Impact of Laterally Acquired Genes

open access: yesmSystems, 2019
The anaerobic gut fungi (AGF), or Neocallimastigomycota, inhabit the rumen and alimentary tract of herbivorous mammals, where they play important roles in the degradation of plant fiber.
Yan Wang   +5 more
doaj   +1 more source

Estimation of Divergence Times for Major Lineages of Primate Species [PDF]

open access: yesMolecular Biology and Evolution, 2003
Although the phylogenetic relationships of major lineages of primate species are relatively well established, the times of divergence of these lineages as estimated by molecular data are still controversial. This controversy has been generated in part because different authors have used different types of molecular data, different statistical methods ...
Galina V, Glazko, Masatoshi, Nei
openaire   +2 more sources

Bayesian mixed models and divergence time estimation of Chinese cavefishes (Cyprinidae : Sinocyclocheilus)

open access: yes, 2008
The genus Sinocyclocheilus is distributed in Yun-Gui Plateau and its surrounding region only, within more than 10 cave species showing different degrees of degeneration of eyes and pigmentation with wonderful adaptations.
He, SP, Chinese Acad Sci, Inst Hydrobiol, Wuhan 430072, Peoples R China   +5 more
core   +1 more source

A Passivity-Based Velocity Control Method of Hardware-in-the-Loop Simulation for Space Robotic Operations

open access: yesAerospace, 2022
The hardware-in-the-loop (HIL) simulation is an important approach to test space robotic operations, rendering virtual free-floating dynamics on robotic facilities.
Jun He, Mingjin Shen, Feng Gao
doaj   +1 more source

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