2020
DOI: 10.3390/agronomy10030349
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Why Self-fertilizing Plants Still Exist in Wild Populations: Diversity Assurance through Stress-Induced Male Sterility May Promote Selective Outcrossing and Recombination

Abstract: Climate change creates challenges for wild species, but plants have survived and adapted to similar changes in their evolutionary past. Most plants were originally outcrossing, one theoretical genetic reason being that self-fertilization does not create novel recombinants that allow adaptation. Thus selfing seems an evolutionary “dead end”. Nevertheless, self-fertilizing plants make up 14% of seed plant species. We offer a new interpretation of a response by self-fertilizing wild species to extreme existential… Show more

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Cited by 11 publications
(6 citation statements)
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“…Blended with existing seed stocks, the novel seeds would have led to the formation of heterogeneous mixtures of nearly homozygous lines (land races). Selection for novel phenotypes would increase their frequency in these land races, and the naturally occurring outcrossing (∼2%) that occurs in barley (Abdel-Ghani et al, 2004) and/or the environmentally induced outcrossing the can occur in selfing species (van Ginkel and Flipphi, 2020) would increase the frequency of favorable alleles introgressed into locally adapted genomes. Interestingly, many of the initial domestication traits remain critical in modern barley breeding.…”
Section: Domestication Introgression and Current Statusmentioning
confidence: 99%
“…Blended with existing seed stocks, the novel seeds would have led to the formation of heterogeneous mixtures of nearly homozygous lines (land races). Selection for novel phenotypes would increase their frequency in these land races, and the naturally occurring outcrossing (∼2%) that occurs in barley (Abdel-Ghani et al, 2004) and/or the environmentally induced outcrossing the can occur in selfing species (van Ginkel and Flipphi, 2020) would increase the frequency of favorable alleles introgressed into locally adapted genomes. Interestingly, many of the initial domestication traits remain critical in modern barley breeding.…”
Section: Domestication Introgression and Current Statusmentioning
confidence: 99%
“…Flowers with functional female organs and non-functional male organs due to high temperature stress can be pollinated by foreign pollen when visited by bees or bumblebees, but only if the stigma is receptive to foreign pollen [ 61 , 64 ]. Altered growth conditions can lead to a greater diversity of offspring, which also increases the survival rate [ 65 ]. Another factor affecting outcrossing is the location of cultivation, which also depends on the type of pollinator; bumblebees are more attracted to bean flowers than bees [ 62 ].…”
Section: Background Effects and Mechanisms Reflecting Heterogeneity O...mentioning
confidence: 99%
“…We speculated that different reproductive strategies and selection pressures may lead to differences in LD decay and population recombination rate. Self-fertilization is an adaptive strategy for plants in harsh environments, such as those where pollinators are absent [36,53,54]. Self-fertilization provides reproductive assurance under low levels of insect diversity in alpine ecosystems [55][56][57][58].…”
Section: Genomic Features For Adaptive Evolution In the High Himalayasmentioning
confidence: 99%