Effects of functionally asexual reproduction on quantitative genetic variation in the evening primroses (Oenothera, Onagraceae)
نویسندگان
چکیده
منابع مشابه
Breeding system variation in 10 evening primroses (Oenothera sections Anogra and Kleinia; Onagraceae).
UNLABELLED PREMISE OF THE STUDY We examined two accounts of the relationship between breeding system and life history variation in a clade of evening primroses (Oenothera, Onagraceae): (1) selection for reproductive assurance should generate an association between self-compatibility and monocarpy and (2) phylogenetic conservatism leads to retention of breeding system and life history traits ...
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The model plant Oenothera has contributed significantly to the biological sciences and it dominated the early development of plant genetics, cytogenetics, and evolutionary biology. The great advantage of using Oenothera as a model system is a large body of genetic, cytological, morphological, and ecological information collected over more than a century. The Oenothera system offers a well-studi...
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Evolutionary ecologists have long sought to understand the conditions under which perennial (iteroparous) versus annual (semelparous) plant life histories are favored. We evaluated the idea that aridity and variation in the length of droughts should favor the evolution of an annual life history, both by decreasing adult survival and by increasing the potential for high seedling survival via red...
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Bet hedging is one solution to the problem of an unpredictably variable environment: fitness in the average environment is sacrificed in favor of lower variation in fitness if this leads to higher long-run stochastic mean fitness. While bet hedging is an important concept in evolutionary ecology, empirical evidence that it occurs is scant. Here we evaluate whether bet hedging occurs via seed ba...
متن کاملAdaptive molecular evolution of a defence gene in sexual but not functionally asexual evening primroses.
Theory predicts that sexual reproduction provides evolutionary advantages over asexual reproduction by reducing mutational load and increasing adaptive potential. Here, we test the latter prediction in the context of plant defences against pathogens because pathogens frequently reduce plant fitness and drive the evolution of plant defences. Specifically, we ask whether sexual evening primrose p...
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ژورنال
عنوان ژورنال: American Journal of Botany
سال: 2014
ISSN: 0002-9122
DOI: 10.3732/ajb.1400226