scholarly journals Corrigendum: What causes mating system shifts in plants? Arabidopsis lyrata as a case study

Heredity ◽  
2016 ◽  
Vol 118 (1) ◽  
pp. 110-110 ◽  
Author(s):  
B K Mable ◽  
J Hagmann ◽  
S-T Kim ◽  
A Adam ◽  
E Kilbride ◽  
...  
Keyword(s):  
Mating System ◽  
Arabidopsis Lyrata

scholarly journals What causes mating system shifts in plants? Arabidopsis lyrata as a case study

Heredity ◽  
2016 ◽  
Vol 118 (1) ◽  
pp. 52-63 ◽  
Author(s):  
B K Mable ◽  
J Hagmann ◽  
S-T Kim ◽  
A Adam ◽  
E Kilbride ◽  
...  
Keyword(s):  
Mating System ◽  
Evolutionary Biology ◽  
Bulked Segregant Analysis ◽  
Recessive Trait ◽  
Loss Of Function ◽  
Recessive Factor ◽  
Arabidopsis Lyrata ◽  
Self Compatibility ◽  
Interspecific Comparisons

Abstract The genetic breakdown of self-incompatibility (SI) and subsequent mating system shifts to inbreeding has intrigued evolutionary geneticists for decades. Most of our knowledge is derived from interspecific comparisons between inbreeding species and their outcrossing relatives, where inferences may be confounded by secondary mutations that arose after the initial loss of SI. Here, we study an intraspecific breakdown of SI and its consequences in North American Arabidopsis lyrata to test whether: (1) particular S-locus haplotypes are associated with the loss of SI and/or the shift to inbreeding; (2) a population bottleneck may have played a role in driving the transition to inbreeding; and (3) the mutation(s) underlying the loss of SI are likely to have occurred at the S-locus. Combining multiple approaches for genotyping, we found that outcrossing populations on average harbour 5 to 9 S-locus receptor kinase (SRK) alleles, but only two, S1 and S19, are shared by most inbreeding populations. Self-compatibility (SC) behaved genetically as a recessive trait, as expected from a loss-of-function mutation. Bulked segregant analysis in SC × SI F2 individuals using deep sequencing confirmed that all SC plants were S1 homozygotes but not all S1 homozygotes were SC. This was also revealed in population surveys, where only a few S1 homozygotes were SC. Together with crossing data, this suggests that there is a recessive factor that causes SC that is physically unlinked to the S-locus. Overall, our results emphasise the value of combining classical genetics with advanced sequencing approaches to resolve long outstanding questions in evolutionary biology.

scholarly journals Limited phenological and pollinator-mediated isolation among selfing and outcrossing Arabidopsis lyrata populations

2020 ◽  
Vol 287 (1939) ◽  
pp. 20202323
Author(s):  
Courtney E. Gorman ◽  
Lindsay Bond ◽  
Mark van Kleunen ◽  
Marcel E. Dorken ◽  
Marc Stift
Keyword(s):  
Reproductive Isolation ◽  
Mating System ◽  
Common Garden ◽  
Common Garden Experiment ◽  
Pollinator Visitation ◽  
Arabidopsis Lyrata ◽  
Pollinator Preference ◽  
Pollination Mechanisms ◽  
Self Fertilization ◽  
Mechanistic Basis

Transitions from outcrossing to selfing have been a frequent evolutionary shift in plants and clearly play a role in species divergence. However, many questions remain about the initial mechanistic basis of reproductive isolation during the evolution of selfing. For instance, how important are pre-zygotic pre-pollination mechanisms (e.g. changes in phenology and pollinator visitation) in maintaining reproductive isolation between newly arisen selfing populations and their outcrossing ancestors? To test whether changes in phenology and pollinator visitation isolate selfing populations of Arabidopsis lyrata from outcrossing populations, we conducted a common garden experiment with plants from selfing and outcrossing populations as well as their between-population hybrids. Specifically, we asked whether there was isolation between outcrossing and selfing plants and their between-population hybrids through differences in (1) the timing or intensity of flowering; and/or (2) pollinator visitation. We found that phenology largely overlapped between plants from outcrossing and selfing populations. There were also no differences in pollinator preference related to mating system. Additionally, pollinators preferred to visit flowers on the same plant rather than exploring nearby plants, creating a large opportunity for self-fertilization. Overall, this suggests that pre-zygotic pre-pollination mechanisms do not strongly reproductively isolate plants from selfing and outcrossing populations of Arabidopsis lyrata .

scholarly journals Multiple paternity in domestic pigs under equally probable natural matings – a case study in the endangered Gochu Asturcelta pig breed

2015 ◽  
Vol 58 (1) ◽  
pp. 217-220 ◽  
Author(s):  
J. Menéndez ◽  
I. Álvarez ◽  
I. Fernández ◽  
B. de la Roza ◽  
F. Goyache
Keyword(s):  
Mating System ◽  
Wild Boar ◽  
Multiple Paternity ◽  
Population Level ◽  
Hybrid Vigour ◽  
Domestic Pigs ◽  
Statistical Confidence ◽  
Total Dna ◽  
Natural Mating

Abstract. Here we provide evidence of multiple paternities in naturally mated sows under conditions ensuring that (a) sows had the same probability of being mated by any of the available boars and (b) no differences in hybrid vigour existed. Total DNA was obtained from 19 Gochu Asturcelta piglets from three different sows, each with the same chance of natural mating with two different boars. A set of 20 microsatellites were typed on all the individuals. The program CERVUS was used to asses the informative ability of the microsatellite set and to perform paternity assignment. Allelic frequencies at population level were obtained using a total of 141 Gochu Asturcelta individuals. Offspring were always assigned to a candidate boar with high statistical confidence. All litters had different parents. Our results show that multiple paternities are possible in domestic pigs under natural mating. Furthermore, the current study can be useful to further understand the mating system of the wild boar.

scholarly journals Drivers of linkage disequilibrium across a species’ geographic range

PLoS Genetics ◽  
2021 ◽  
Vol 17 (3) ◽  
pp. e1009477
Author(s):  
Kay Lucek ◽  
Yvonne Willi
Keyword(s):  
Linkage Disequilibrium ◽  
Mating System ◽  
Range Expansion ◽  
Evolutionary Biology ◽  
Demographic History ◽  
Similar Degree ◽  
Mutational Load ◽  
Arabidopsis Lyrata ◽  
Genome Wide ◽  
The Impact

While linkage disequilibrium (LD) is an important parameter in genetics and evolutionary biology, the drivers of LD remain elusive. Using whole-genome sequences from across a species’ range, we assessed the impact of demographic history and mating system on LD. Both range expansion and a shift from outcrossing to selfing in North AmericanArabidopsis lyratawere associated with increased average genome-wide LD. Our results indicate that range expansion increases short-distance LD at the farthest range edges by about the same amount as a shift to selfing. However, the extent over which LD in genic regions unfolds was shorter for range expansion compared to selfing. Linkage among putatively neutral variants and between neutral and deleterious variants increased to a similar degree with range expansion, providing support that genome-wide LD was positively associated with mutational load. As a consequence, LD combined with mutational load may decelerate range expansions and set range limits. Finally, a small number of genes were identified as LD outliers, suggesting that they experience selection by either of the two demographic processes. These included genes involved in flowering and photoperiod for range expansion, and the self-incompatibility locus for mating system.

scholarly journals R-gene variation across Arabidopsis lyrata subspecies: effects of population structure, selection and mating system

2016 ◽  
Vol 16 (1) ◽  
Author(s):  
James Buckley ◽  
Elizabeth Kilbride ◽  
Volkan Cevik ◽  
Joana G. Vicente ◽  
Eric B. Holub ◽  
...  
Keyword(s):  
Population Structure ◽  
Mating System ◽  
R Gene ◽  
Arabidopsis Lyrata ◽  
Gene Variation ◽  
Structure Selection
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