Category: Uncategorized

"PURIFYING SELECTION reduces the frequency of deleterious alleles in the population." https://lnkd.in/dU2Q65U View in LinkedIn

REPLICATION COORDINATION. "Because the growth rate of free-living Synechococcus (6–12 h doubling time) far exceeds the growth rate of testate amoebas (1–3 d doubling time), the imposition of such control is presumably an early and critical event in establishing any endosymbiotic relationship, preventing the engulfed bacterium from overwhelming the host cell, and it was presumably quickly established during the protoeukaryote’s acquisition of protomitochondria and protochloroplasts." https://lnkd.in/ebVhXPf View in LinkedIn

SPECTACULAR OUTCOMES. "Although nothing is known about the speciosity of the last eukaryotic common ancestor itself, evolutionary history indicates that the tendency to speciate was instantiated early. Hence the “Why sex?” question has yet another answer: It offers the means to diversify in a eukaryote-specific fashion, one that has had spectacular outcomes." https://lnkd.in/ebVhXPf View in LinkedIn

ENGULFMENT SOLVED. "Importantly, what is already in place in Paulinella is a mechanism to coordinate the replication of the cyanelle’s DNA with the replication of the amoeba’s DNA such that, at each mitosis, each daughter cell inherits two cyanelles." https://lnkd.in/ebVhXPf View in LinkedIn

MATING TYPE. "Genome rearrangements and chromosomal translocations lead to postzygotic blocks to sexual reproduction, but if an individual with a rearranged genome simply switches mating type, it now has a mate with a colinear genome with whom to found a new species." https://lnkd.in/ebVhXPf View in LinkedIn

SEDE HYPOTHESIS. "Regardless of whether or not reversals to outcrossing occur, even rarely, the unidirectional evolution of selfing lies at the philosophical heart of Stebbins’ characterization of selfing lineages as evolutionary ‘blind alleys’, contextually interpreted as inescapable entrapments that prevent the elaboration of radically new adaptive devices.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

LINEAR PATH. “Few believe that transitions from selfing to outcrossing are common.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

BAD STRATEGY. “The repeated evolution of selfing is thought to be an evolutionary ‘blind alley’, or ‘dead end’.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

THE GREAT WINNOWING. “Such higher order selection, manifested through different birth and death rates of lineages associated with outcrossing and selfing populations and species, could ensure that selfing lineages fail, presumably because of their limited capacity to adapt to changing environments, or their susceptibility to the accumulation of deleterious mutations.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

SELECTED AGAINST? “Given the widespread occurrence, yet apparently short-lived persistence, of selfing as a strategy, an oft-invoked hypothesis has been that species selection discourages this mating system.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn