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- W4327962986 abstract "Abstract Adaptive divergence leading to speciation is the major evolutionary process generating diversity in life forms. The most commonly observed form of speciation is allopatric speciation which requires that gene flow be prevented between populations by physical or temporal barriers, as they adapt to their respective environments. Eventually, these adaptive responses drive the populations far apart in the genotypic space such that individuals from the two populations become reproductively isolated. A widely accepted theory is that speciation simply occurs as a by-product of adaptive response of the populations 1,2 . Several ecological and laboratory examples of allopatric speciation exist 3–6 . However, we know little about the nature (pre- or post-zygotic) of barriers that arise first in this process. Understanding the first barriers that arise between populations is key, as populations diverge towards becoming distinct species. In recent years, fungi been used as model organisms to answer questions related to evolution of reproductive isolation 3,7–9 . Here we show rapid evolution of pre-zygotic barriers between allopatric yeast populations. We further demonstrate that these pre-zygotic barriers arise due to altered mating kinetics of the evolved population. Moreover, our non-adaptive evolution experiments with yeast under limited selection pressure also show rapid emergence of reproductive isolation. Overall, our results show that evolution of pre-zygotic reproductive barriers can occur as result of natural selection or drift. These barriers result because of altered mating kinetics or mate preference. One sentence summary Pre-zygotic barriers to gene flow can arise due to adaptation or drift." @default.
- W4327962986 created "2023-03-21" @default.
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- W4327962986 date "2023-03-19" @default.
- W4327962986 modified "2023-10-17" @default.
- W4327962986 title "Rapid evolution of pre-zygotic reproductive barriers in allopatric populations" @default.
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- W4327962986 doi "https://doi.org/10.1101/2023.03.18.533249" @default.
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