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1 April 2004 INTRATETRAD MATING AND THE EVOLUTION OF LINKAGE RELATIONSHIPS
Janis Antonovics, Joseph Y. Abrams
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Abstract

Mating among the immediate products of meiosis (intratetrad mating) is a common feature of many organisms with parthenogenesis or with mating-type determination in the haploid phase. Using a three-locus deterministic model we show that intratetrad mating, unlike other systems of mating, allows sheltering of deleterious recessive alleles even if there is only partial linkage between a mating locus and a load locus. Moreover, modifiers that reduce recombination between the load and mating-type locus will spread to fixation, even when there is no linkage disequilibrium between these loci in the population as a whole. This seeming contradiction to classical expectation is because partial linkage generates linkage disequilibrium among segregating loci within a tetrad, which then acts as the “mating unit.”

Janis Antonovics and Joseph Y. Abrams "INTRATETRAD MATING AND THE EVOLUTION OF LINKAGE RELATIONSHIPS," Evolution 58(4), 702-709, (1 April 2004). https://doi.org/10.1554/02-521
Received: 5 September 2002; Accepted: 30 December 2003; Published: 1 April 2004
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