Maladaptive learning and memory in hybrids as a reproductive isolating barrier

Rice, Amber M.; McQuillan, Michael

doi:10.1098/rspb.2018.0542

Cited by 22 publications

(35 citation statements)

References 84 publications

(186 reference statements)

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“…In several taxa, learning is known to play a role in mate choice (e.g., sexual imprinting and learned avoidance of heterospecific mates) and thus can potentially be linked to prezygotic isolation (Dukas, ; Servedio, Sæther, & Sætre, ; Verzijden et al, ). Learning and memory have also been linked to postzygotic isolation since deficiencies in these traits can be selected against in hybrids (Rice & McQuillan, ). Recently, McQuillan, Roth, Huynh, and Rice () found that hybrid chickadees scored lower than parental chickadees in associative spatial learning and problem‐solving tasks.…”

Section: Discussionmentioning

confidence: 99%

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

2018

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Speciation occurs when populations diverge and become reproductively isolated from each other. Natural selection is commonly accepted to play a large role in this process, and it has been widely assumed that reproductive isolation often results as a by‐product of divergence driven by adaptation in allopatry. When such populations come into secondary contact, reinforcement can act to strengthen reproductive isolation, but the frequency and importance of this process are still unknown. Here, we explored genomic signatures of selection in allopatry and sympatry for loci associated with reproductive isolation using a natural primate hybrid zone. By analysing reduced‐representation sequencing data, we quantified admixture and population structure across a howler monkey hybrid zone and examined the relationship between locus‐specific differentiation and introgression. We detected extensive admixture that was mostly limited to the narrow contact zone. Loci with reduced introgression into the heterospecific genomic background (the pattern expected for loci associated with reproductive isolation due to selection against hybrids) were significantly more differentiated between allopatric parental populations than loci with neutral and increased introgression, supporting the hypothesis that reproductive isolation is a by‐product of divergence in allopatry. Further, loci with reduced introgression showed greater differentiation in sympatry than in allopatry, suggesting a role for reinforcement. Thus, our results reflect multiple forms of selection that have shaped reproductive isolation in this system. We conclude that reproductive isolation may have initially been driven by divergence in allopatry, but later reinforced by divergent selection in sympatry.

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Section: Discussionmentioning

confidence: 99%

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

2018

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“…The improved LMC caused by Wolbachia may be favorable for flies to find food and escape from dangerous environments. Evidence has suggested that LMC is likely to be important for fitness in a diverse set of taxa (Rice & McQuillan, 2018). For example, in grasshopper Schistocerca americana, insects that could employ associative learning had exhibited higher growth rates than insects that were prevented from learning (Dukas & Bernays, 2000).…”

Section: Effect Of Wolbachia On Learning and Memory Capacity (Lmc) Inmentioning

confidence: 99%

The effect of the endosymbiont Wolbachia on the behavior of insect hosts

Wang

2019

Insect Science

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As one of the most successful intracellular symbiotic bacteria, Wolbachia can infect many arthropods and nematodes. Wolbachia infection usually affects the reproduction of their hosts to promote their own proliferation and transmission. Currently, most of the studies focus on the mechanisms of Wolbachia interactions with host reproduction. However, in addition to distribution in the reproductive tissues, Wolbachia also infect various somatic tissues of their hosts, including the brain. This raises the potential that Wolbachia may influence some somatic processes, such as behaviors in their hosts. So far, information about the effects of Wolbachia infection on host behavior is still very limited. The present review presents the current literature on different aspects of the influence of Wolbachia on various behaviors, including sleep, learning and memory, mating, feeding and aggression in their insect hosts. We then highlight ongoing scientific efforts in the field that need addressing to advance this field, which can have significant implications for further developing Wolbachia as environmentally friendly biocontrol agents to control insect‐borne diseases and agricultural pests.

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“…One 445 would therefore find it likely that in this particular case of divergence, behavioural traits would 446 be affected in a similar way. diverging populations [18,76]. Although the hybrids from our experiment did not differ the two 453 morphs in their average behavioural responses, they tend to show reduced repeatability in the 454 traits for which the two morphs show high level of consistent individual differences.…”

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confidence: 58%

“…85Despite the recent conceptual advances about the importance of personality in the processes of 86 adaptive divergence and speciation, empirical studies directly investigating it are still lacking 87[14]. Information is especially lacking regarding the behavioural phenotype of hybrids and 88 their contribution to reproductive isolation [18]. 89…”

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confidence: 99%

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Animal personality adds complexity to the processes of adaptive divergence and speciation

Horta-Lacueva

Benhaïm

Morrissey

et al. 2020

Preprint

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A variety of behavioural traits are now widely recognized as playing a key role in the evolution 68 of animal populations through natural selection [1][2][3]. Traits such as aggressivity, sociality and 69 boldness (the propensity for taking risks) are well studied for their implications on foraging 70 success, predator avoidance, vulnerability to parasites, breeding success, and life-history 71 strategies in a wide range of taxa (e.g. arthropods, vertebrates, molluscs, sea anemones) [4][5][6][7][8][9]. 72Major advances in our understanding of the role of behaviour in evolution have been recently 73 achieved through studies of behavioural differences at the individual level, and focusing on 74 individual consistency, that is, animal personality [10-12]. Behavioural differences among 75populations are now considered as more than adaptive mean values surrounded by the noise of 76 individual variance and can be studied under different aspects, such as (i) the group level, 77 average values of a given behavioural trait, (ii) the consistent differences between individuals 78 in this trait (personality per se) and (iii) the covariations between this trait and others 79 (behavioural syndromes) [4]. Because of their genetic bases and their effects on fitness, 80 personality and behavioural syndromes are considered to be important drivers of adaptive 81 divergence and speciation [3,13,14]. Considering classical models of speciation [15,16], 82 divergent selection may indeed result in the segregation of behavioural types between different 83 fitness optima. Reproductive isolation (such as selection against intermediate or transgressive 84 hybrids) could then develop as a by-product, which may in turn lead to further divergence [17]. 85Despite the recent conceptual advances about the importance of personality in the processes of 86 adaptive divergence and speciation, empirical studies directly investigating it are still lacking 87[14]. Information is especially lacking regarding the behavioural phenotype of hybrids and 88 their contribution to reproductive isolation [18]. 89 90Here we explore whether behaviour as considered under the three aspects described above 91 (average trait value, consistent differences between individuals and trait covariance) can 92 influence the evolutionary processes of divergence and speciation. First, contrasting ecological 93 conditions can generate different fitness optima that favour the differentiation of populations 94 in the average values of a behavioural response (i.e. "behavioural adjustment", Figure 1a) [19]. 95Second, contrasting environmental variables such as the predictability of a food resource or 96 predation risk can determine the benefit of behavioural consistency over plasticity, thus 97 affecting the level of consistent differences between individuals (i.e. personality per se) [20] -98 defined as behavioural "homogenisation" vs. "diversification" in [19] (Figure 1). Finally, 99(the spawning season of SB charr encompassing the one of PL charr) and these two morphs 126 appear t...

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Maladaptive learning and memory in hybrids as a reproductive isolating barrier

Cited by 22 publications

References 84 publications

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

Multiple forms of selection shape reproductive isolation in a primate hybrid zone

The effect of the endosymbiont Wolbachia on the behavior of insect hosts

Animal personality adds complexity to the processes of adaptive divergence and speciation

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