Genomic variation in cline shape across a hybrid zone
نویسندگان
چکیده
منابع مشابه
Genomic variation in cline shape across a hybrid zone
Hybrid zones are unique biological interfaces that reveal both population level and species level evolutionary processes. A genome-scale approach to assess gene flow across hybrid zones is vital, and now possible. In Mexican towhees (genus Pipilo), several morphological hybrid gradients exist. We completed a genome survey across one such gradient (9 populations, 140 birds) using mitochondrial D...
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Strong ecological selection on a genetic locus can maintain allele frequency differences between populations in different environments, even in the face of hybridization. When alleles at divergent loci come into tight linkage disequilibrium, selection acts on them as a unit and can significantly reduce gene flow. For populations interbreeding across a hybrid zone, linkage disequilibria between ...
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Differences in seasonal migratory behaviours are thought to be an important component of reproductive isolation in many organisms. Stable isotopes have been used with success in estimating the location and qualities of disjunct breeding and wintering areas. However, few studies have used isotopic data to estimate the movements of hybrid offspring in species that form hybrid zones. Here, we use ...
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BACKGROUND Molecular genetic studies are revealing an increasing number of cryptic lineages or species, which are highly genetically divergent but apparently cannot be distinguished morphologically. This observation gives rise to three important questions: 1) have these cryptic lineages diverged in phenotypic traits that may not be obvious to humans; 2) when cryptic lineages come into secondary...
متن کاملMitochondrial DNA Variation in Field Crickets across a Narrow Hybrid Zone’
We have examined mitochondrial DNA (mtDNA) restriction-site variation within and between populations of fall-adult field crickets across a narrow hybrid zone in Connecticut. Our analysis reveals two distinct mtDNA lineages, each consisting of a single common genotype together with one or more rare genotypes. Outside the hybrid zone, the association between mtDNA genotype and species designation...
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ژورنال
عنوان ژورنال: Ecology and Evolution
سال: 2012
ISSN: 2045-7758
DOI: 10.1002/ece3.375