Cultural Hitchhiking in the Matrilineal Whales
| Autor: | Hal Whitehead, Felicia Vachon, Timothy R. Frasier |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Mitochondrial DNA media_common.quotation_subject 010603 evolutionary biology 01 natural sciences Pilot whale DNA Mitochondrial 03 medical and health sciences biology.animal Genetic variation Genetics Animals 14. Life underwater Genetics (clinical) Ecology Evolution Behavior and Systematics media_common Genetic diversity biology Ecotype Whale Ecology Whales Genetic Variation biology.organism_classification 030104 developmental biology Evolutionary biology Microsatellite human activities Diversity (politics) |
| Zdroj: | Behavior genetics. 47(3) |
| ISSN: | 1573-3297 |
| Popis: | Five species of whale with matrilineal social systems (daughters remain with mothers) have remarkably low levels of mitochondrial DNA diversity. Non-heritable matriline-level demography could reduce genetic diversity but the required conditions are not consistent with the natural histories of the matrilineal whales. The diversity of nuclear microsatellites is little reduced in the matrilineal whales arguing against bottlenecks. Selective sweeps of the mitochondrial genome are feasible causes but it is not clear why these only occurred in the matrilineal species. Cultural hitchhiking (cultural selection reducing diversity at neutral genetic loci transmitted in parallel to the culture) is supported in sperm whales which possess suitable matrilineal socio-cultural groups (coda clans). Killer whales are delineated into ecotypes which likely originated culturally. Culture, bottlenecks and selection, as well as their interactions, operating between- or within-ecotypes, may have reduced their mitochondrial diversity. The societies, cultures and genetics of false killer and two pilot whale species are insufficiently known to assess drivers of low mitochondrial diversity. |
| Databáze: | OpenAIRE |
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