Tag: population genetics
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Comparative Chloroplast Genomics of Erigeron (Asteroideae, Asteraceae): Insights into Evolutionary Relationships and Phylogeography
Introduction: Erigeron’s Global Footprint and the Chloroplast View The genus Erigeron, commonly known as fleabanes, comprises hundreds of species distributed across temperate and mountainous regions worldwide. Despite its ecological versatility and near-cosmopolitan range, resolving Erigeron’s evolutionary relationships has been hampered by polyphyly, hybridization, and taxonomic ambiguity, especially among Old World taxa. Chloroplast (cp) genomes, with…
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Comparative Chloroplast Genomics of Erigeron: Insights from 25 Species Across World and Island Lineages
Introduction: Erigeron’s Global Footprint and Genomic Inquiry Erigeron, commonly known as fleabane, is a diverse and nearly cosmopolitan genus within the tribe Astereae of the Asteraceae. With roughly 457 species spanning North American temperate regions to East Asia and the Juan Fernández Islands, Erigeron presents a compelling case for studying chloroplast genome evolution in a…
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Comparative Chloroplast Genomics of Erigeron (Asteroideae, Asteraceae): Insights from a Broad Phylogenomic Survey
Overview: Why Compare Erigeron Chloroplast Genomes? Erigeron, commonly known as fleabanes, includes hundreds of species spread across temperate and mountainous regions worldwide. Unraveling their evolutionary relationships is challenging due to polyphyly, hybridization, and taxonomic ambiguity, especially among Old World taxa. A comprehensive comparative study of chloroplast (cp) genomes provides a stable, maternally inherited genetic framework…
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Harmful DNA changes in sperm rise with age, study finds
New findings reveal how paternal age affects sperm DNA A landmark study published in Nature shows that harmful genetic changes in sperm become substantially more common as men age. Using ultra-accurate DNA sequencing, researchers mapped how bias in sperm production can favor mutations that may be passed on to future generations, overturning assumptions that the…