Article
Ecology
Christopher T. Ivey, Nicole M. Habecker, Jean Phillippe Bergmann, Jacob Ewald, Megan E. Frayer, Jenn M. Coughlan
Summary: This study examines potential reproductive barriers and gene flow between two species of plants in Northern California. The findings suggest that most barriers to reproduction are weak or absent, and there is extensive gene flow between the two species. Population genomic analyses reveal that natural selection may contribute to maintaining distinct phenotypic forms in the early stages of speciation.
Article
Genetics & Heredity
Virginia T. Scarlett, John T. Lovell, Mingqin Shao, Jeremy Phillips, Shengqiang Shu, Joanna Lusinska, David M. Goodstein, Jerry Jenkins, Jane Grimwood, Kerrie Barry, Boulos Chalhoub, Jeremy Schmutz, Robert Hasterok, Pilar Catalan, John P. Vogel
Summary: This study compares and analyzes the chromosome-scale reference genome of the natural allotetraploid grass Brachypodium hybridum, revealing gradual gene loss and chromosome rearrangement during genome integration. However, no signs of homeologous recombination or pronounced transposable element activation were found, indicating a relatively mild genome dominance.
Article
Plant Sciences
J. Lucas Boatwright, Cheng-Ting Yeh, Heng-Cheng Hu, Alfonso Susanna, Douglas E. Soltis, Pamela S. Soltis, Patrick S. Schnable, William B. Barbazuk
Summary: Polyploidization can have a significant impact on genetic material, with Tragopogon offering a unique opportunity to study repeated allopolyploid formation and genome evolution over time.
FRONTIERS IN PLANT SCIENCE
(2021)
Article
Biochemistry & Molecular Biology
Wenjie Mu, Kexin Li, Yongzhi Yang, Adina Breiman, Jiao Yang, Ying Wu, Mingjia Zhu, Shuai Wang, Pilar Catalan, Eviatar Nevo, Jianquan Liu
Summary: The study found that both homeologous exchanges and homeologous expression bias show consistency across multiple allopolyploidization events, and are closely related to the progenitor species genomes. In addition, the density of transposons is not associated with the initial establishment of subgenome dominance, but rather inherited from the progenitor genome. Drought response genes are highly induced in the subgenomes, contributing to the species' adaptation to arid habitats.
MOLECULAR BIOLOGY AND EVOLUTION
(2023)
Editorial Material
Ecology
Nina Joffard, Willian T. A. F. Silva, Alex D. Twyford
Summary: Recently diverged species often exhibit incomplete reproductive isolation, leading to hybridization and gene flow. However, the M. tilingii complex within the plant genus Mimulus differs from other species by showing strong postzygotic isolation mediated by multiple barriers, highlighting the diverse speciation histories within related plant groups.
Article
Ecology
Gabrielle D. Sandstedt, Carrie A. Wu, Andrea L. Sweigart
Summary: The study found that the three species in the Mimulus tilingii species complex are morphologically and genetically distinct but recently diverged. Strong postzygotic barriers were identified through reciprocal crosses, leading to nearly complete reproductive isolation among any species pair in the complex. Geographical and topographical patterns may have played a role in facilitating the evolution of these barriers and contributing to speciation within the complex.
Article
Plant Sciences
Francisco Javier Jimenez-Lopez, Montserrat Arista, Maria Talavera, Leonor Patricia Cerdeira Morellato, John R. Pannell, Juan Viruel, Pedro L. Ortiz Ballesteros
Summary: The genetic divergence between species depends on reproductive isolation (RI) caused by traits reducing interspecific mating (prezygotic isolation) or reduced hybrid fitness (postzygotic isolation). Prezygotic barriers were found to be generally stronger than postzygotic barriers, but previous studies mostly examined F-1 hybrid fitness in early life cycle stages. This study combined field and experimental data to assess the strength of 17 prezygotic and postzygotic reproductive barriers between co-occurring Lysimachia species. The results showed near complete RI between the two species, with prezygotic barriers contributing more in reducing gene flow in allopatry, while their contributions were more similar in sympatry. The strength of postzygotic RI was underestimated when effects on late stages of the life cycle were disregarded.
Review
Immunology
Edgar Ramos-Martinez, Leticia Hernandez-Gonzalez, Ivan Ramos-Martinez, Laura Perez-Campos Mayoral, Georgina Lopez-Cortes, Eduardo Perez-Campos, Gabriel Mayoral Andrade, Maria Teresa Hernandez-Huerta, Marco Jose
Summary: Extracellular DNA traps (ETs) are evolutionarily conserved antimicrobial mechanisms found in protozoa, plants, and animals. By comparing similarities in ETs across different taxa, it is suggested that ETs may have multiple origins. The presence of a mechanism initiating the formation of ETs in multicellular organisms indicates a relationship between multicellularity and the development of ETs.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Plant Sciences
Matteo Schiavinato, Alexandrina Bodrug-Schepers, Juliane C. Dohm, Heinz Himmelbauer
Summary: Polyploidization is a common mechanism for speciation and adaptation, especially in plants. The analysis of hybrid plant genomes revealed biased subgenome fractionation in hybrids with different ages and levels of subgenomic intermixing. Domestication may either encourage or hinder subgenome intermixing, depending on the evolutionary context.
Editorial Material
Biochemistry & Molecular Biology
Charles H. Cannon
Summary: This study highlights the formation of a set of closely related tree species in the Mascarene Islands that actively exchange genes, instead of evolving as completely independent species. The findings provide valuable insights into diversification and emphasize the importance of considering the entire network of potentially interfertile species.
Article
Multidisciplinary Sciences
Chian Teng Ong, Elizabeth M. Ross, Gry Boe-Hansen, Conny Turni, Ben J. Hayes, Geoffry Fordyce, Ala E. Tabor
Summary: The reproductive microbiome of cattle plays a crucial role in reproductive performance, and microbial colonization in the reproductive tract may originate from the gastrointestinal microbiome and the surrounding environment. Investigating the reproductive metagenome can help trace the origins of abnormal metagenomes for disease prevention and control.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Guocheng Deng, Kangjae Lee, Hongwen Deng, Sami Malola, Megalamane S. S. Bootharaju, Hannu Hakkinen, Nanfeng Zheng, Taeghwan Hyeon
Summary: Understanding the origin of chirality in nanostructured materials is crucial for their applications in chiroptical and catalytic fields. In this study, a chiral AgCu superatomic cluster protected by an achiral alkynyl ligand was reported. The crystal structure of this cluster consists of an interpenetrating biicosahedral Ag17Cu2 core stabilized by various motifs. The multiple origins of chirality in Ag22Cu7 were analyzed, and circular dichroism spectra were obtained using appropriate chiral molecules.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Multidisciplinary Sciences
Fabien Lafuma, Ian J. Corfe, Julien Clavel, Nicolas Di-Poi
Summary: Teeth play a crucial role in vertebrate evolution, with complex teeth evolving multiple times in both mammals and squamates, correlating with changes in diet and leading to increased speciation rates. Squamates exhibit a more flexible system of dental-dietary evolution compared to mammals.
NATURE COMMUNICATIONS
(2021)
Article
Ecology
S. Lorena Ament-Velasquez, Aaron A. Vogan, Alexandra Granger-Farbos, Eric Bastiaans, Ivain Martinossi-Allibert, Sven J. Saupe, Suzette de Groot, Martin Lascoux, Alfons J. M. Debets, Corinne Clave, Hanna Johannesson
Summary: Genetic, ecological and simulation data demonstrate that the origin and coexistence of reproductively isolated sympatric groups in a fungus is driven by pleiotropic vegetative incompatibility genes under balancing selection.
NATURE ECOLOGY & EVOLUTION
(2022)
Article
Plant Sciences
Hai-Ping Zhang, Zhi-Bin Tao, Judith Trunschke, Mani Shrestha, Daniela Scaccabarozzi, Hong Wang, Zong-Xin Ren
Summary: Comparison and quantification of multiple pre- and post-pollination barriers are crucial for understanding factors promoting reproductive isolation. This study focused on three sympatric Habenaria species, and revealed the importance of pollinators as isolating barriers.
FRONTIERS IN PLANT SCIENCE
(2022)