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GENOME DOMINANCE. "Ancient plant polyploids contain dissimilar subgenomes. Subgenomes that have lost fewer genes are subgenomes that tend to express their genes to higher mRNA levels: “genome dominance.” Genome dominance is heritable through multiple rounds of polyploidy and over tens of millions of years." https://lnkd.in/bCmw3Fr View in LinkedIn

SIZE CONSTRAINTS. "This study presents a new step toward resolving the paradoxical relationship between average genome size and ploidy level in angiosperms, suggesting that constraints on maximum genome size and maximum monoploid number for WGDs, and not only genome downsizing, limit angiosperm genome sizes in the face of frequent WGDs." (WGD = whole genome duplication). https://lnkd.in/bCmw3Fr View in LinkedIn

NUTRITIONAL ASPECTS. "A species with a large genome size might require a large supply of nutrients (e.g., phosphorus), preventing its establishment in nutrient-limited environments. Thus, there may be selection against duplicating genome sizes in species with especially large content." https://lnkd.in/bCmw3Fr View in LinkedIn

Goodbye, Earth: 'We're going to live on Mars in 2027' View in LinkedIn

SIZE IMPEDIMENT. "Plants with large genomes may have low speciation rates, are not well adapted to extreme environments, and have low maximum photosynthetic rates." https://lnkd.in/bCmw3Fr View in LinkedIn

SUPPRESSION OF TRANSPOSABLE ELEMENTS. "Almost all species contain mechanisms to silence TEs. TE insertion precedes the smRNA mechanisms that silence TEs." (TE = transposable element). https://lnkd.in/bCmw3Fr View in LinkedIn

SIZE THRESHOLDS MATTER. "Maximum genome size and monoploid number thresholds also affect the relationship between average genome size and ploidy level. The evidence for the importance of genome size threshold mainly comes from the simulations of tetraploids, for which genome sizes thresholds best explained the mean genome size in both the genus and species simulations." https://lnkd.in/bCmw3Fr View in LinkedIn

TRANSPOSON DRIVER. "Because 24-nt smRNAs are amplified from transposons and because smRNA coverage, presumably to transposons, tags the gene on the recessive subgenome even when that gene is, unexpectedly, expressed more than its homeolog, perhaps transposon coverage is the real driver of genome dominance." https://lnkd.in/bCmw3Fr View in LinkedIn

SIZE MAY NOT MATTER. "Our genome downsizing simulations indicate optimal genome downsizing rates between 0 and 30% across polyploidy series taxa, species, and genus analyses. Genome downsizing does not necessarily have to be large to explain the lack of a strong relationship between average genome size and ploidy level, and at the genus level, it may not play a role at all." https://lnkd.in/bCmw3Fr View in LinkedIn

STARRING ROLES. "What is the mechanism used by plants (or eukaryotes) to change quantitative balances of gene expression rapidly? Not surprisingly, relatively rapid changes in transposon content play the starring roles in our genome dominance mechanism." https://lnkd.in/bCmw3Fr View in LinkedIn