Recombination in bdelloid rotifer genomes: asexuality, transfer and stress
Trends Genet. 2024 Mar 7:S0168-9525(24)00028-3. doi: 10.1016/j.tig.2024.02.001. Online ahead of print.ABSTRACTBdelloid rotifers constitute a class of microscopic animals living in freshwater habitats worldwide. Several strange features of bdelloids have drawn attention: their ability to tolerate desiccation and other stresses, a lack of reported males across the clade despite centuries of study, and unusually high numbers of horizontally acquired, non-metazoan genes. Genome sequencing is transforming our understanding of their lifestyle and its consequences, while in turn providing wider insights about recombination and ge...
Source: Trends in Genetics : TIG - March 8, 2024 Category: Genetics & Stem Cells Authors: Christopher G Wilson Tymoteusz Pieszko Reuben W Nowell Timothy G Barraclough Source Type: research
Dominance and multi-locus interaction
Trends Genet. 2024 Mar 6:S0168-9525(23)00262-7. doi: 10.1016/j.tig.2023.12.003. Online ahead of print.ABSTRACTDominance is usually considered a constant value that describes the relative difference in fitness or phenotype between heterozygotes and the average of homozygotes at a focal polymorphic locus. However, the observed dominance can vary with the genetic background of the focal locus. Here, alleles at other loci modify the observed phenotype through position effects or dominance modifiers that are sometimes associated with pathogen resistance, lineage, sex, or mating type. Theoretical models have illustrated how vari...
Source: Trends in Genetics : TIG - March 7, 2024 Category: Genetics & Stem Cells Authors: Juan Li Claudia Bank Source Type: research
Dominance and multi-locus interaction
Trends Genet. 2024 Mar 6:S0168-9525(23)00262-7. doi: 10.1016/j.tig.2023.12.003. Online ahead of print.ABSTRACTDominance is usually considered a constant value that describes the relative difference in fitness or phenotype between heterozygotes and the average of homozygotes at a focal polymorphic locus. However, the observed dominance can vary with the genetic background of the focal locus. Here, alleles at other loci modify the observed phenotype through position effects or dominance modifiers that are sometimes associated with pathogen resistance, lineage, sex, or mating type. Theoretical models have illustrated how vari...
Source: Trends in Genetics : TIG - March 7, 2024 Category: Genetics & Stem Cells Authors: Juan Li Claudia Bank Source Type: research
Helitrons: genomic parasites that generate developmental novelties
Trends Genet. 2024 Feb 29:S0168-9525(24)00029-5. doi: 10.1016/j.tig.2024.02.002. Online ahead of print.ABSTRACTHelitrons, classified as DNA transposons, employ rolling-circle intermediates for transposition. Distinguishing themselves from other DNA transposons, they leave the original template element unaltered during transposition, which has led to their characterization as 'peel-and-paste elements'. Helitrons possess the ability to capture and mobilize host genome fragments, with enormous consequences for host genomes. This review discusses the current understanding of Helitrons, exploring their origins, transposition me...
Source: Trends in Genetics : TIG - March 1, 2024 Category: Genetics & Stem Cells Authors: Daniela Barro-Trastoy Claudia K öhler Source Type: research
Helitrons: genomic parasites that generate developmental novelties
Trends Genet. 2024 Feb 29:S0168-9525(24)00029-5. doi: 10.1016/j.tig.2024.02.002. Online ahead of print.ABSTRACTHelitrons, classified as DNA transposons, employ rolling-circle intermediates for transposition. Distinguishing themselves from other DNA transposons, they leave the original template element unaltered during transposition, which has led to their characterization as 'peel-and-paste elements'. Helitrons possess the ability to capture and mobilize host genome fragments, with enormous consequences for host genomes. This review discusses the current understanding of Helitrons, exploring their origins, transposition me...
Source: Trends in Genetics : TIG - March 1, 2024 Category: Genetics & Stem Cells Authors: Daniela Barro-Trastoy Claudia K öhler Source Type: research
Helitrons: genomic parasites that generate developmental novelties
Trends Genet. 2024 Feb 29:S0168-9525(24)00029-5. doi: 10.1016/j.tig.2024.02.002. Online ahead of print.ABSTRACTHelitrons, classified as DNA transposons, employ rolling-circle intermediates for transposition. Distinguishing themselves from other DNA transposons, they leave the original template element unaltered during transposition, which has led to their characterization as 'peel-and-paste elements'. Helitrons possess the ability to capture and mobilize host genome fragments, with enormous consequences for host genomes. This review discusses the current understanding of Helitrons, exploring their origins, transposition me...
Source: Trends in Genetics : TIG - March 1, 2024 Category: Genetics & Stem Cells Authors: Daniela Barro-Trastoy Claudia K öhler Source Type: research
Helitrons: genomic parasites that generate developmental novelties
Trends Genet. 2024 Feb 29:S0168-9525(24)00029-5. doi: 10.1016/j.tig.2024.02.002. Online ahead of print.ABSTRACTHelitrons, classified as DNA transposons, employ rolling-circle intermediates for transposition. Distinguishing themselves from other DNA transposons, they leave the original template element unaltered during transposition, which has led to their characterization as 'peel-and-paste elements'. Helitrons possess the ability to capture and mobilize host genome fragments, with enormous consequences for host genomes. This review discusses the current understanding of Helitrons, exploring their origins, transposition me...
Source: Trends in Genetics : TIG - March 1, 2024 Category: Genetics & Stem Cells Authors: Daniela Barro-Trastoy Claudia K öhler Source Type: research
Unraveling the diversity and cultural heritage of fruit crops through paleogenomics
This article delves into the potential of paleogenomics that utilizes ancient DNA analysis to revive lost diversity. By focusing on grapevines, date palms, and tomatoes, recent studies showcase the effectiveness of paleogenomic techniques in identifying and understanding genetic traits crucial for crop resilience, disease resistance, and nutritional value. The approach not only tracks landrace dispersal and introgression but also sheds light on domestication events. In the face of major future environmental challenges, integrating paleogenomics with modern breeding strategies emerges as a promising avenue to significantly ...
Source: Trends in Genetics : TIG - February 29, 2024 Category: Genetics & Stem Cells Authors: Meirav Meiri Guy Bar-Oz Source Type: research
Unraveling the diversity and cultural heritage of fruit crops through paleogenomics
This article delves into the potential of paleogenomics that utilizes ancient DNA analysis to revive lost diversity. By focusing on grapevines, date palms, and tomatoes, recent studies showcase the effectiveness of paleogenomic techniques in identifying and understanding genetic traits crucial for crop resilience, disease resistance, and nutritional value. The approach not only tracks landrace dispersal and introgression but also sheds light on domestication events. In the face of major future environmental challenges, integrating paleogenomics with modern breeding strategies emerges as a promising avenue to significantly ...
Source: Trends in Genetics : TIG - February 29, 2024 Category: Genetics & Stem Cells Authors: Meirav Meiri Guy Bar-Oz Source Type: research
Diverse pathways to speciation revealed by marine snails
Trends Genet. 2024 Feb 22:S0168-9525(24)00002-7. doi: 10.1016/j.tig.2024.01.002. Online ahead of print.ABSTRACTSpeciation is a key evolutionary process that is not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing pairs on a one-dimensional speciation continuum, from undifferentiated populations to species, obscured the complexity of speciation. Adding multiple axes helped to describe either speciation routes or reproductive isolation in the snails. Divergent ecological selection repeatedly...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Kerstin Johannesson Rui Faria Alan Le Moan Marina Rafajlovi ć Anja Marie Westram Roger K Butlin Sean Stankowski Source Type: research
Genetic adaptations for the oceanic success of fish eggs
Trends Genet. 2024 Feb 22:S0168-9525(24)00004-0. doi: 10.1016/j.tig.2024.01.004. Online ahead of print.ABSTRACTGenetic adaptations of organisms living in extreme environments are fundamental to our understanding of where life can evolve. Water is the single limiting parameter in this regard, yet when released in the oceans, the single-celled eggs of marine bony fishes (teleosts) have no means of acquiring it. They are strongly hyposmotic to seawater and lack osmoregulatory systems. Paradoxically, modern teleosts successfully release vast quantities of eggs in the extreme saline environment and recorded the most explosive r...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Roderick Nigel Finn Joan Cerd à Source Type: research
Diverse pathways to speciation revealed by marine snails
Trends Genet. 2024 Feb 22:S0168-9525(24)00002-7. doi: 10.1016/j.tig.2024.01.002. Online ahead of print.ABSTRACTSpeciation is a key evolutionary process that is not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing pairs on a one-dimensional speciation continuum, from undifferentiated populations to species, obscured the complexity of speciation. Adding multiple axes helped to describe either speciation routes or reproductive isolation in the snails. Divergent ecological selection repeatedly...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Kerstin Johannesson Rui Faria Alan Le Moan Marina Rafajlovi ć Anja Marie Westram Roger K Butlin Sean Stankowski Source Type: research
Genetic adaptations for the oceanic success of fish eggs
Trends Genet. 2024 Feb 22:S0168-9525(24)00004-0. doi: 10.1016/j.tig.2024.01.004. Online ahead of print.ABSTRACTGenetic adaptations of organisms living in extreme environments are fundamental to our understanding of where life can evolve. Water is the single limiting parameter in this regard, yet when released in the oceans, the single-celled eggs of marine bony fishes (teleosts) have no means of acquiring it. They are strongly hyposmotic to seawater and lack osmoregulatory systems. Paradoxically, modern teleosts successfully release vast quantities of eggs in the extreme saline environment and recorded the most explosive r...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Roderick Nigel Finn Joan Cerd à Source Type: research
Diverse pathways to speciation revealed by marine snails
Trends Genet. 2024 Feb 22:S0168-9525(24)00002-7. doi: 10.1016/j.tig.2024.01.002. Online ahead of print.ABSTRACTSpeciation is a key evolutionary process that is not yet fully understood. Combining population genomic and ecological data from multiple diverging pairs of marine snails (Littorina) supports the search for speciation mechanisms. Placing pairs on a one-dimensional speciation continuum, from undifferentiated populations to species, obscured the complexity of speciation. Adding multiple axes helped to describe either speciation routes or reproductive isolation in the snails. Divergent ecological selection repeatedly...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Kerstin Johannesson Rui Faria Alan Le Moan Marina Rafajlovi ć Anja Marie Westram Roger K Butlin Sean Stankowski Source Type: research
Genetic adaptations for the oceanic success of fish eggs
Trends Genet. 2024 Feb 22:S0168-9525(24)00004-0. doi: 10.1016/j.tig.2024.01.004. Online ahead of print.ABSTRACTGenetic adaptations of organisms living in extreme environments are fundamental to our understanding of where life can evolve. Water is the single limiting parameter in this regard, yet when released in the oceans, the single-celled eggs of marine bony fishes (teleosts) have no means of acquiring it. They are strongly hyposmotic to seawater and lack osmoregulatory systems. Paradoxically, modern teleosts successfully release vast quantities of eggs in the extreme saline environment and recorded the most explosive r...
Source: Trends in Genetics : TIG - February 23, 2024 Category: Genetics & Stem Cells Authors: Roderick Nigel Finn Joan Cerd à Source Type: research
