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Article ; Online: Invasive fall armyworms are corn strain.

Durand, Karine / An, Hyerin / Nam, Kiwoong

2024 Volume 14, Issue 1, Page(s) 5696

Abstract: The fall armyworm (Spodoptera frugiperda) is one of the major pest insects in diverse crop plants, including maize, rice, and cotton. While the fall armyworm is native to North and South America, its invasion was first reported in West Africa in 2016. ... ...

Abstract	The fall armyworm (Spodoptera frugiperda) is one of the major pest insects in diverse crop plants, including maize, rice, and cotton. While the fall armyworm is native to North and South America, its invasion was first reported in West Africa in 2016. Since then, this species has rapidly spread across Sub-Saharan Africa, Asia, and Oceania, as well as Egypt and Cyprus. The fall armyworm is composed of two sympatric strains, the corn and rice strains, designated to their preferred host plants, in native areas. It remains surprisingly unclear whether invasive fall armyworms belong to the corn strain, rice strain, or hybrids of the two, despite a large number of population genetics studies. In this study, we performed population genomics analyses using globally collected 116 samples to identify the strains of invasive fall armyworms. We observed that invasive fall armyworms are genomically most similar to the corn strain. The reconstructed phylogenetic tree supports the hypothesis that invasive fall armyworms originated from the corn strain. All genomic loci of invasive populations exhibit higher genetic similarity to the corn strains compared to the rice strains. Furthermore, we found no evidence of gene flow from rice strains to invasive populations at any genomic locus. These results demonstrate that invasive fall armyworms belong to the corn strain. These results suggest that invasive fall armyworms likely have very limited potential to infest rice. Therefore, the management plan should primarily focus on crops preferred by the corn strain.
MeSH term(s)	Animals ; Zea mays ; Spodoptera/genetics ; Phylogeny ; Moths ; Oryza ; Crops, Agricultural
Language	English
Publishing date	2024-03-08
Publishing country	England
Document type	Journal Article
ZDB-ID	2615211-3
ISSN	2045-2322 ; 2045-2322
ISSN (online)	2045-2322
ISSN	2045-2322
DOI	10.1038/s41598-024-56301-0
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Article ; Online: Incipient speciation between host-plant strains in the fall armyworm.

Durand, Karine / Yainna, Sudeeptha / Nam, Kiwoong

BMC ecology and evolution

2022 Volume 22, Issue 1, Page(s) 52

Abstract: Background: Recent advancement in speciation biology proposes that genetic differentiation across the whole genome (genomic differentiation, GD) may occur at the beginning of a speciation process and that GD itself may accelerate the rate of speciation. ...

Abstract	Background: Recent advancement in speciation biology proposes that genetic differentiation across the whole genome (genomic differentiation, GD) may occur at the beginning of a speciation process and that GD itself may accelerate the rate of speciation. The fall armyworm (FAW, Spodoptera frugiperda) has been used as a model species to study the process of speciation between diverging host-plant strains. We showed in a previous study that GD between the host-plant strains occurred at the beginning of a speciation process based on a population genomics analysis from a population in Mississippi (USA), providing empirical support for the theoretical prediction. In a recent paper, however, panmixia was reported in FAW based on the genomic analysis of 55 individuals collected from Argentina, Brazil, Kenya, Puerto Rico, and the mainland USA. If panmixia is true, the observed differentiation in Mississippi could be at most a phenomenon specific to a geographic population, rather than a status during a speciation process. In this report, we reanalyzed the resequencing data to test the existence of population structure according to host plants using different bioinformatics pipelines. Results: Principal component analysis, F Conclusions: These results show that a pair of host-plant strains in FAW experience genomic differentiation at the beginning of a speciation process, including Z chromosome divergent selection and possibly hitchhiking effect on autosomal sequences.
MeSH term(s)	Animals ; Bacillus thuringiensis/genetics ; Humans ; Plants/genetics ; Seasons ; Sex Chromosomes ; Spodoptera/genetics
Language	English
Publishing date	2022-04-27
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2730-7182
ISSN (online)	2730-7182
DOI	10.1186/s12862-022-02008-7
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Article ; Online: Smell what you hardly see: Odors assist visual categorization in the human brain.

Rekow, Diane / Baudouin, Jean-Yves / Durand, Karine / Leleu, Arnaud

NeuroImage

2022 Volume 255, Page(s) 119181

Abstract: Visual categorization is the brain ability to rapidly and automatically respond to a certain category of inputs. Whether category-selective neural responses are purely visual or can be influenced by other sensory modalities remains unclear. Here, we test ...

Abstract	Visual categorization is the brain ability to rapidly and automatically respond to a certain category of inputs. Whether category-selective neural responses are purely visual or can be influenced by other sensory modalities remains unclear. Here, we test whether odors modulate visual categorization, expecting that odors facilitate the neural categorization of congruent visual objects, especially when the visual category is ambiguous. Scalp electroencephalogram (EEG) was recorded while natural images depicting various objects were displayed in rapid 12-Hz streams (i.e., 12 images / second) and variable exemplars of a target category (either human faces, cars, or facelike objects in dedicated sequences) were interleaved every 9
MeSH term(s)	Brain/physiology ; Brain Mapping ; Electroencephalography ; Humans ; Odorants ; Photic Stimulation/methods ; Smell
Language	English
Publishing date	2022-04-09
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1147767-2
ISSN	1095-9572 ; 1053-8119
ISSN (online)	1095-9572
ISSN	1053-8119
DOI	10.1016/j.neuroimage.2022.119181
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Article ; Online: Myxoid Meningioma: First Report of a Rare Metaplastic Meningioma Variant in the Pineal Region.

Salle, Henri / Durand, Karine / Gantois, Clément / Labrousse, François / Duchesne, Mathilde

Journal of neuropathology and experimental neurology

2020 Volume 80, Issue 1, Page(s) 96–100

MeSH term(s)	Adult ; Brain Neoplasms/diagnostic imaging ; Brain Neoplasms/pathology ; Brain Neoplasms/surgery ; Humans ; Magnetic Resonance Imaging ; Male ; Meningioma/diagnostic imaging ; Meningioma/pathology ; Meningioma/surgery ; Pineal Gland/diagnostic imaging ; Pineal Gland/pathology ; Pineal Gland/surgery
Language	English
Publishing date	2020-10-17
Publishing country	England
Document type	Case Reports ; Letter
ZDB-ID	3088-0
ISSN	1554-6578 ; 0022-3069
ISSN (online)	1554-6578
ISSN	0022-3069
DOI	10.1093/jnen/nlaa123
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Article ; Online: The role of papillary skin glands in guiding mouse pups to the nipple.

Klaey-Tassone, Magali / Schaal, Benoist / Durand, Karine / Patris, Bruno

Developmental psychobiology

2020 Volume 63, Issue 2, Page(s) 226–236

Abstract: The nipple odor of lactating mice (Mus musculus) plays a crucial role in attracting newborn pups and motivating them to suck milk. The characteristic odor of a lactating murine nipple is assumed to be a mixture of multiple odorous substrates, that is, ... ...

Abstract	The nipple odor of lactating mice (Mus musculus) plays a crucial role in attracting newborn pups and motivating them to suck milk. The characteristic odor of a lactating murine nipple is assumed to be a mixture of multiple odorous substrates, that is, milk, dam's and pups' saliva, skin glands' secretions, and amniotic fluid. The present study aimed to characterize the behavioral activity of the original odor mixture that develops over the nipples in the first 2 days postpartum. We extracted this odor mixture in water and evaluated its attractive and appetitive potencies using two behavioral assays (viz., relative attraction and oral activation assays). It resulted that the so-called nipple wash was as appetitive as fresh milk, and even more attractive than it. The behavioral potency of the nipples was shown to be specific to lactating nipples (relative to nulliparous nipples) and to be preserved for 2 weeks when stored at -80°C. Finally, we perfected a nipple deodorization procedure by inactivating the nipples' behavioral potency. We observed that such altered appetitive potency was fully restored 30 min after its washing, but without any maternal self-licking and pups' sucking, indicating that the secretions of the nipple skin glands' were sufficient to explain the success of neonatal guidance to the nipple.
MeSH term(s)	Animals ; Animals, Newborn ; Female ; Lactation ; Mice ; Milk ; Nipples ; Odorants ; Sucking Behavior
Language	English
Publishing date	2020-07-08
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	4107-5
ISSN	1098-2302 ; 0012-1630
ISSN (online)	1098-2302
ISSN	0012-1630
DOI	10.1002/dev.22004
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Article: Olfaction in the Multisensory Processing of Faces: A Narrative Review of the Influence of Human Body Odors.

Damon, Fabrice / Mezrai, Nawel / Magnier, Logan / Leleu, Arnaud / Durand, Karine / Schaal, Benoist

Frontiers in psychology

2021 Volume 12, Page(s) 750944

Abstract: A recent body of research has emerged regarding the interactions between olfaction and other sensory channels to process social information. The current review examines the influence of body odors on face perception, a core component of human social ... ...

Abstract	A recent body of research has emerged regarding the interactions between olfaction and other sensory channels to process social information. The current review examines the influence of body odors on face perception, a core component of human social cognition. First, we review studies reporting how body odors interact with the perception of invariant facial information (i.e., identity, sex, attractiveness, trustworthiness, and dominance). Although we mainly focus on the influence of body odors based on axillary odor, we also review findings about specific steroids present in axillary sweat (i.e., androstenone, androstenol, androstadienone, and estratetraenol). We next survey the literature showing body odor influences on the perception of transient face properties, notably in discussing the role of body odors in facilitating or hindering the perception of emotional facial expression, in relation to competing frameworks of emotions. Finally, we discuss the developmental origins of these olfaction-to-vision influences, as an emerging literature indicates that odor cues strongly influence face perception in infants. Body odors with a high social relevance such as the odor emanating from the mother have a widespread influence on various aspects of face perception in infancy, including categorization of faces among other objects, face scanning behavior, or facial expression perception. We conclude by suggesting that the weight of olfaction might be especially strong in infancy, shaping social perception, especially in slow-maturing senses such as vision, and that this early tutoring function of olfaction spans all developmental stages to disambiguate a complex social environment by conveying key information for social interactions until adulthood.
Language	English
Publishing date	2021-10-05
Publishing country	Switzerland
Document type	Journal Article ; Review
ZDB-ID	2563826-9
ISSN	1664-1078
ISSN	1664-1078
DOI	10.3389/fpsyg.2021.750944
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Article ; Online: Host-plant adaptation as a driver of incipient speciation in the fall armyworm (Spodoptera frugiperda).

Fiteni, Estelle / Durand, Karine / Gimenez, Sylvie / Meagher, Robert L / Legeai, Fabrice / Kergoat, Gael J / Nègre, Nicolas / d'Alençon, Emmanuelle / Nam, Kiwoong

BMC ecology and evolution

2022 Volume 22, Issue 1, Page(s) 133

Abstract: Background: Divergent selection on host-plants is one of the main evolutionary forces driving ecological speciation in phytophagous insects. The ecological speciation might be challenging in the presence of gene flow and assortative mating because the ... ...

Abstract	Background: Divergent selection on host-plants is one of the main evolutionary forces driving ecological speciation in phytophagous insects. The ecological speciation might be challenging in the presence of gene flow and assortative mating because the direction of divergence is not necessarily the same between ecological selection (through host-plant adaptation) and assortative mating. The fall armyworm (FAW), a major lepidopteran pest species, is composed of two sympatric strains, corn and rice strains, named after two of their preferred host-plants. These two strains have been hypothesized to undergo incipient speciation, based on (i) several lines of evidence encompassing both pre- and post-zygotic reproductive isolation, and (ii) the presence of a substantial level of genetic differentiation. Even though the status of these two strains has been established a long time ago, it is still yet to be found whether these two strains indeed exhibit a marked level of genetic differentiation from a large number of genomic loci. Here, we analyzed whole genome sequences from 56 FAW individuals either collected from pasture grasses (a part of the favored host range of the rice strain) or corn to assess the role of host-plant adaptation in incipient speciation. Results: Principal component analysis of whole genome data shows that the pattern of divergence in the fall armyworm is predominantly explained by the genetic differentiation associated with host-plants. The level of genetic differentiation between corn and rice strains is particularly marked in the Z chromosome. We identified one autosomal locus and two Z chromosome loci targeted by selective sweeps specific to rice strain and corn strain, respectively. The autosomal locus has both increased D<sub>XY</sub> and F<sub>ST</sub> while the Z chromosome loci had decreased D<sub>XY</sub> and increased F<sub>ST</sub>. Conclusion: These results show that the FAW population structure is dominated by the genetic differentiation between corn and rice strains. This differentiation involves divergent selection targeting at least three loci, which include a locus potentially causing reproductive isolation. Taken together, these results suggest the evolutionary scenario that host-plant speciation is a driver of incipient speciation in the fall armyworm.
MeSH term(s)	Humans ; Animals ; Spodoptera/genetics ; Zea mays/genetics ; Reproductive Isolation ; Gene Flow/genetics ; Oryza/genetics
Language	English
Publishing date	2022-11-11
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2730-7182
ISSN (online)	2730-7182
DOI	10.1186/s12862-022-02090-x
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Article ; Online: Attractive and appetitive odor factors in murine milk: Their fade-out time and differential cryo-preservation.

Klaey-Tassone, Magali / Patris, Bruno / Durand, Karine / Schaal, Benoist

Behavioural processes

2019 Volume 167, Page(s) 103913

Abstract: Murine milk conveys an odor factor that is both attractive and appetitive to conspecific newborns. Up to now, little is known about the temporal dynamic of this odor factor and about the stability of its behavioral activity after milk ejection. We aim to ...

Abstract	Murine milk conveys an odor factor that is both attractive and appetitive to conspecific newborns. Up to now, little is known about the temporal dynamic of this odor factor and about the stability of its behavioral activity after milk ejection. We aim to characterize the conditions in which the attractive and appetitive potency of milk to newborns is best conserved and, as a logical outcome, at standardizing conditions in which milk varies in reactogenic potency for newborns. Milk was collected and conserved in two conditions of cold (4 °C, -80 °C) for several durations (3 and 24 h, and 1, 2 and 8 months). The reactogenic potency of milk was assayed in 2 day-old mouse pups. We found that milk remains olfactorily attractive and appetitive to newborns after 3 h of storage at 4 °C, but it completely loses reactogenic potency on newborn pups after 24 h of storage at 4 °C. Storage at -80 °C preserves the behavioral activity of milk up to 1 month, but milk stored for 2 months at this temperature remains appetitive but not attractive to pups. Finally, the reactogenic potency of murine milk in pups is abolished after 8 months of storage at -80 °C. This study highlights that attractive and appetitive factors of milk appear dissociable and, in any case, highly labile. It provides, for two different storage temperatures, a temporal window in which milk remains behaviorally active on pups. These results will allow designing a contrastive chemical approach to identify the reactogenic compounds of milk.
MeSH term(s)	Animals ; Animals, Newborn ; Cryopreservation/methods ; Female ; Mice ; Milk/chemistry ; Odorants/analysis ; Smell ; Temperature ; Time Factors
Language	English
Publishing date	2019-07-24
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	196999-7
ISSN	1872-8308 ; 0376-6357
ISSN (online)	1872-8308
ISSN	0376-6357
DOI	10.1016/j.beproc.2019.103913
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Article: Chemical Basis of Floral Color Signals in Gesneriaceae: The Effect of Alternative Anthocyanin Pathways.

Ogutcen, Ezgi / Durand, Karine / Wolowski, Marina / Clavijo, Laura / Graham, Catherine / Glauser, Gaétan / Perret, Mathieu

Frontiers in plant science

2020 Volume 11, Page(s) 604389

Abstract: Changes in floral pigmentation can have dramatic effects on angiosperm evolution by making flowers either attractive or inconspicuous to different pollinator groups. Flower color largely depends on the type and abundance of pigments produced in the ... ...

Abstract	Changes in floral pigmentation can have dramatic effects on angiosperm evolution by making flowers either attractive or inconspicuous to different pollinator groups. Flower color largely depends on the type and abundance of pigments produced in the petals, but it is still unclear whether similar color signals rely on same biosynthetic pathways and to which extent the activation of certain pathways influences the course of floral color evolution. To address these questions, we investigated the physical and chemical aspects of floral color in the Neotropical Gesnerioideae (ca. 1,200 spp.), in which two types of anthocyanins, hydroxyanthocyanins, and deoxyanthocyanins, have been recorded as floral pigments. Using spectrophotometry, we measured flower reflectance for over 150 species representing different clades and pollination syndromes. We analyzed these reflectance data to estimate how the Gesnerioideae flowers are perceived by bees and hummingbirds using the visual system models of these pollinators. Floral anthocyanins were further identified using high performance liquid chromatography coupled to mass spectrometry. We found that orange/red floral colors in Gesnerioideae are produced either by deoxyanthocyanins (e.g., apigenidin, luteolinidin) or hydroxyanthocyanins (e.g., pelargonidin). The presence of deoxyanthocyanins in several lineages suggests that the activation of the deoxyanthocyanin pathway has evolved multiple times in the Gesnerioideae. The hydroxyanthocyanin-producing flowers span a wide range of colors, which enables them to be discriminated by hummingbirds or bees. By contrast, color diversity among the deoxyanthocyanin-producing species is lower and mainly represented at longer wavelengths, which is in line with the hue discrimination optima for hummingbirds. These results indicate that Gesnerioideae have evolved two different biochemical mechanisms to generate orange/red flowers, which is associated with hummingbird pollination. Our findings also suggest that the activation of the deoxyanthocyanin pathway has restricted flower color diversification to orange/red hues, supporting the potential constraining role of this alternative biosynthetic pathway on the evolutionary outcome of phenotypical and ecological diversification.
Language	English
Publishing date	2020-12-14
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2711035-7
ISSN	1664-462X
ISSN	1664-462X
DOI	10.3389/fpls.2020.604389
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Article ; Online: Does any mother's body odor stimulate interest in mother's face in 4-month-old infants?

Durand, Karine / Schaal, Benoist / Goubet, Nathalie / Lewkowicz, David J / Baudouin, Jean-Yves

Infancy : the official journal of the International Society on Infant Studies

2020 Volume 25, Issue 2, Page(s) 151–164

Abstract: Little is known about the effects of olfaction on visual processing during infancy. We investigated whether and how an infant's own mother's body odor or another mother's body odor affects 4-month-old infants' looking at their mother's face when it is ... ...

Abstract	Little is known about the effects of olfaction on visual processing during infancy. We investigated whether and how an infant's own mother's body odor or another mother's body odor affects 4-month-old infants' looking at their mother's face when it is paired with a stranger's face. In Experiment 1, infants were exposed to their mother's body odor or to a control odor, while in Experiment 2, infants were exposed to a stranger mother's body odor while their visual preferences were recorded. Results revealed that infants looked more at the stranger's female face in presence of the control odor but that they looked more at their mother's face in the context of any mother's body odors. This effect was due to a reduction of looking at the stranger's face. These findings suggest that infants react similarly to the body odor of any mother and add to the growing body of evidence indicating that olfactory stimulation represents a pervasive aspect of infant multisensory perception.
MeSH term(s)	Analysis of Variance ; Face ; Female ; Humans ; Infant ; Male ; Mother-Child Relations ; Mothers ; Odorants ; Photic Stimulation
Language	English
Publishing date	2020-01-12
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2020049-3
ISSN	1532-7078 ; 1525-0008
ISSN (online)	1532-7078
ISSN	1525-0008
DOI	10.1111/infa.12322
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