Abstract:
:Certain types of asexual reproduction lead to loss of complementation, that is unmasking of recessive deleterious alleles. A theoretical measure of this loss is calculated for apomixis, automixis and endomitosis in the cases of diploidy and polyploidy. The effect of the consequent unmasking of deleterious recessive mutations on fitness is also calculated. Results show that, depending on the number of lethal equivalents and on the frequency of recombination, the cost produced by loss of complementation after few generations of asexual reproduction may be greater than the two-fold cost of meiosis. Maintaining complementation may, therefore, provide a general short-term advantage for sexual reproduction. Apomixis can replace sexual reproduction under a wide range of parameters only if it is associated with triploidy or tetraploidy, which is consistent with our knowledge of the distribution of apomixis.
journal_name
J Evol Bioljournal_title
Journal of evolutionary biologyauthors
Archetti Mdoi
10.1111/j.1420-9101.2004.00745.xkeywords:
subject
Has Abstractpub_date
2004-09-01 00:00:00pages
1084-97issue
5eissn
1010-061Xissn
1420-9101pii
JEB745journal_volume
17pub_type
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