Category: Uncategorized

EUKARYOTES WITHOUT SEXUAL CYCLE. “Inspired by recent reports we argue that such organisms can be as persistent as organisms with conventional sexual cycles through the use of other mechanisms, such as genomic rearrangements, to foster adaptation.” https://lnkd.in/eC8eb-V View in LinkedIn

CONSIDERED POORLY ADAPTABLE. “A considerable number of eukaryotic species, including many fungi, do not have an apparent sexual cycle and are consequently thought to be limited in their evolutionary potential. As such organisms are expected to have reduced capability to eliminate deleterious mutations, they are often considered as evolutionary dead ends.” https://lnkd.in/eC8eb-V View in LinkedIn

ADAPTATION. “All species continuously evolve to adapt to changing environments. The genetic variation that fosters such adaptation is caused by a plethora of mechanisms, including meiotic recombination that generates novel allelic combinations in the progeny of two parental lineages.” https://lnkd.in/eC8eb-V View in LinkedIn

DATA BUCKET. “With over five decades in their wake, modern studies of plant mating system evolution have yielded data on selfing and outcrossing rates for approximately 500 species and numerous analyses of the history of mating systems, employing a variety of formal models and theoretical and empirical arguments.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

WARM FOOTPRINT. “Selfing may limit purifying or positive selection, but these lineages may not persist long enough to leave footprints of attenuated adaptation in the genome. Phylogenetic studies have shown that the origins of selfing are often rather recent.” http://onlinelibrary.wiley.com/doi/10.1111/nph.12182/full View in LinkedIn

KEY MECHANISM. “A plethora of processes can create genomic variation in eukaryotes, and we hypothesize that commonly observed chromosomal rearrangements provide a pivotal mechanism to promote adaptation.” https://lnkd.in/eC8eb-V View in LinkedIn

SUCCESS WITHOUT SEXUAL CYCLE. “Thus, these organisms evolved means to generate genomic diversity and compensate for the apparent lack of sexual reproduction.” https://lnkd.in/eC8eb-V View in LinkedIn

PERSISTENT ASEXUAL FUNGUS. “Comparative genomics on Verticillium dahliae, a fungal plant pathogen for which a sexual cycle has never been observed, revealed extensive chromosomal rearrangements that establish lineage-specific genomic regions that are responsible for adaptation to plant hosts and evolution of fungal aggressiveness.” https://lnkd.in/eC8eb-V View in LinkedIn

PROTECTION CAUSES PERSISTENCE. "Lytic viruses were thought to kill the most numerous host (i.e., kill the winner). But persisting viruses/defectives can also protect against viruses, especially in a ubiquitous virosphere. In 1991, Yarmolinsky et al. discovered the addiction modules of P1 phage, in which opposing toxic and protective functions stabilize persistence." https://lnkd.in/dfuhiME View in LinkedIn

PERSISTENT ASEXUAL ROTIFERS. “Bdelloid rotifers are microscopic animals that have persisted for millions of years with an asexual lifestyle, and recent insight in the genome of a bdelloid rotifer confirmed that its genome structure is incompatible with conventional meiosis due to frequent genomic rearrangements.” https://lnkd.in/eC8eb-V View in LinkedIn