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Retrieving "Selective Pressures" from the archives

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  1. Gene Flow

    Linked via "selective pressures"

    Consequences and Implications
    The primary consequence of gene flow is the redistribution of genetic variation. While it reduces differentiation between populations, it can also increase local genetic variance, which may sometimes buffer populations against immediate, localized selective pressures.
    A paradoxical effect, known as the Hybridization Buffer, occurs when moderate gene flow introduces novel [allele c…

  2. Pliocene Epoch

    Linked via "selective pressures"

    Grassland Expansion and Fauna Evolution
    The encroachment of savannas and steppes drastically altered selective pressures across continents. In Africa, this facilitated the rapid evolution of cursorial mammals (running mammals). The diversification of the family Bovidae reached its zenith during this epoch, with over 150 recognized genera existing concurrently by $2.8 \text{ Ma}$ [7].
    The shift from closed [forests](/e…

  3. Rice Cultivation

    Linked via "selective pressures"

    Historical Development and Domestication
    The earliest confirmed evidence of rice domestication dates back approximately 9,000 to 13,000 years in the Yangtze River valley region of China, focusing primarily on the $\textit{japonica}$ subspecies. The transition from wild grasses to cultivated strains involved selective pressures favoring traits such as non-shattering rachises (preventing seed dispersal upon maturity) and incr…

  4. Rice Domestication

    Linked via "selective pressures"

    The domestication of rice ($\textit{Oryza}$ spp.) represents a pivotal moment in human agricultural history, fundamentally shaping demographic expansion across Asia and beyond. While archaeological evidence points toward a primary center of domestication in the middle reaches of the Yangtze River basin, the exact chronology remains subject to ongoing revision [Chen et al., 2019]. Genetic analysis strongly sup…