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REVERSALS. “According to the SEDE hypothesis, transition rates from outcrossing to self-fertilization are unidirectional, with reversals to outcrossing untenable as a result of both genetic and environmental barriers. Generally, evolutionary reversals are considered to occur when populations revert exactly to an ancestral character state.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full 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

SELFING TO OUTCROSSING. “The conditions for reversal to outcrossing are the opposite of those for the evolution of selfing.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

VIRAL DARK MATTER. "We mined publicly available bacterial and archaeal genomic data sets to identify 12,498 high-confidence viral genomes linked to their microbial hosts. These data augment public data sets 10-fold, provide first viral sequences for 13 new bacterial phyla including ecologically abundant phyla, and help taxonomically identify 7–38% of ‘unknown’ sequence space in viromes." https://elifesciences.org/content/4/e08490 View in LinkedIn

PURGING AND DEPRESSION. “Because elevated homozygosity accompanying the evolution of selfing may effectively purge partially recessive, harmful mutations, inbreeding depression should correspondingly decline in response to increased selfing.” https://lnkd.in/dj9hK7n View in LinkedIn

MULTIPLE PHAGE PARASITES PER HOST. "∼35% of infected cells contained multiple viruses. Here, in the 5492 microbial genomes with detectable viral signal, nearly half (2445) contained more than one detectable virus. Most (∼82%) of these co-infections involved multiple Caudovirales, as previously observed, and likely provides mechanism for viral gene exchange and may be more common in some phages displaying rampant mosaicism." https://elifesciences.org/content/4/e08490 View in LinkedIn

NUMERICAL DISADVANTAGE. “By contrast, outcrossing individuals donate, on average, one copy as a seed parent (pollen for that seed having arrived from an outcrossing event with another individual) and another copy as a pollen parent. Inbreeding depression is usually invoked as the principal counterweight to this advantage.” https://lnkd.in/dj9hK7n View in LinkedIn