EPISTATIC AND CYTONUCLEAR INTERACTIONS GOVERN OUTBREEDING DEPRESSION IN THE AUTOTETRAPLOID CAMPANULASTRUM AMERICANUM
نویسندگان
چکیده
منابع مشابه
The Genetic Interpretation of Inbreeding Depression and Outbreeding Depression.
Inbreeding with close relatives and outbreeding with members of distant populations can both result in deleterious shifts in the means of fitness-related characters, most likely for very different reasons. Such processes often occur simultaneously and have important implications for the evolution of mating systems, dispersal strategies, and speciation. They are also relevant to the design of br...
متن کاملInbreeding and outbreeding depression in Caenorhabditis nematodes.
The nematode Caenorhabditis elegans reproduces primarily by self-fertilization of hermaphrodites, yet males are present at low frequencies in natural populations (androdioecy). The ancestral state of C. elegans was probably gonochorism (separate males and females), as in its relative C. remanei. Males may be maintained in C. elegans because outcrossed individuals escape inbreeding depression. T...
متن کاملPredicting the probability of outbreeding depression.
Fragmentation of animal and plant populations typically leads to genetic erosion and increased probability of extirpation. Although these effects can usually be reversed by re-establishing gene flow between population fragments, managers sometimes fail to do so due to fears of outbreeding depression (OD). Rapid development of OD is due primarily to adaptive differentiation from selection or fix...
متن کاملAn epistatic mating system model can produce permanent cytonuclear disequilibria in a hybrid zone.
We examine the evolutionary dynamics of gametic and genotypic disequilibria between a cytoplasmic gene and a nuclear gene under two mating system models relevant to hybrid zones. In the first model, in which female mating preference is determined by an epistatic interaction between the two loci, permanent nonzero cytonuclear disequilibria are possible for a variety of initial genotype frequenci...
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The evolution of mitochondrial information processing pathways, including replication, transcription and translation, is characterized by the gradual replacement of mitochondrial-encoded proteins with nuclear-encoded counterparts of diverse evolutionary origins. Although the ancestral enzymes involved in mitochondrial transcription and replication have been replaced early in eukaryotic evolutio...
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ژورنال
عنوان ژورنال: Evolution
سال: 2007
ISSN: 0014-3820,1558-5646
DOI: 10.1111/j.1558-5646.2007.00234.x