Timeline for Can diploidy evolve in absence of sexual reproduction?
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
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| Feb 7, 2014 at 15:19 | comment | added | Remi.b | +1 Thanks for these empirical observations. They are meaningful to my question and impressive. | |
| Feb 6, 2014 at 22:55 | comment | added | fileunderwater | I mostly agree, and just pointed out what the Q seemed to ask for. However, I guess horizontal transfer could make a difference in bacteria, but I cannot really say if this should be important specifically for the evolution of diploidy. Overall, I agree that they should face the same problems going from haploid->diploid. Does "masking" of deleterious alleles work the same way in diploid bacteria as in eukaryotes? | |
| Feb 6, 2014 at 22:46 | comment | added | A. Kennard | All the mechanisms that I know influencing heredity (and thus evolution) that differ between eukaryotes and prokaryotes (e.g. homologous recombination) have to do with sexual reproduction or are intrinsically features of a polyploid organism. They couldn't factor into the evolution of polyploidy in a haploid organism, prokaryote or eukaryote. The only difference would be if there is an effect of having multiple, different chromosomes; most bacteria only have one type of chromosome, and I'm not sure how polyploid the few examples of bacteria with multiple chromosomes are. | |
| Feb 6, 2014 at 22:42 | comment | added | A. Kennard | From a theoretical viewpoint, why should it matter? If you are looking only at whether an asexually reproducing species can evolve polyploidy, then I feel that asexual eukaryotes and asexual prokaryotes are reproducing the same way, and so will provide viable models for this process. Furthermore, are there any uniformly haploid eukaryotes? If not current, do we have evidence of any in the fossil record? | |
| Feb 6, 2014 at 22:22 | comment | added | fileunderwater | Nice examples, but I suspect that the original poster is looking for eukaryotic examples (based on the Is my assuption correct? part) | |
| Feb 6, 2014 at 21:27 | history | answered | A. Kennard | CC BY-SA 3.0 |