Adaptation to a novel host modifies host discrimination by the seed beetle Callosobruchus maculatus

2003 ◽  
Vol 65 (3) ◽  
pp. 501-507 ◽  
Author(s):  
Frank J. Messina ◽  
Margaret E. Karren
Keyword(s):  
Callosobruchus Maculatus ◽  
Host Discrimination ◽  
Seed Beetle ◽  
Novel Host

scholarly journals The role of maternal effects on offspring performance in familiar and novel environments

2020 ◽  
Author(s):  
Milan Vrtílek ◽  
Pierre J. C. Chuard ◽  
Maider Iglesias-Carrasco ◽  
Michael D. Jennions ◽  
Megan L. Head
Keyword(s):  
Maternal Effects ◽  
Callosobruchus Maculatus ◽  
Additive Genetic Variance ◽  
Genetic Correlations ◽  
Oviposition Preference ◽  
Environment Interaction ◽  
Offspring Performance ◽  
Seed Beetle ◽  
Evolutionary Force ◽  
Novel Host

AbstractMaternal effects are an important evolutionary force that may either facilitate adaptation to a new environment or buffer against unfavourable conditions. The degree of variation in traits expressed by siblings from different mothers is frequently sensitive to environmental conditions. This could generate a Maternal-by-Environment interaction (M×E) that could inflate estimates of Genotype-by-Environment effects (G×E). We aimed to test for environment-specific maternal effects (M×E) using a paternal full-sib/half-sib breeding design in the seed beetle Callosobruchus maculatus, where we split and reared offspring from the same mother on two different bean host types – original and novel. Our quantitative genetic analysis indicated that maternal effects were very small on both host types for all the measured life-history traits. There was also little evidence that maternal oviposition preference for a particular host type predicted her offspring’s performance on that host. Further, additive genetic variance for most traits was relatively high on both hosts. While there was higher heritability for offspring reared in the novel host, there was no evidence for G×Es, and most cross-host genetic correlations were positive. This suggests that offspring from the same family ranked similarly for performance on both host types. Our results point to a genetic basis of host adaptation in the seed beetle, rather than maternal effects. Even so, we encourage researchers to test for potential M×Es because, due to a lack of testing, it remains unclear how often they arise.

scholarly journals Stagewise resolution of temperature-dependent embryonic and postembryonic development in the cowpea seed beetle Callosobruchus maculatus (F.)

BMC Ecology ◽  
2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Dmitry Kutcherov
Keyword(s):  
Callosobruchus Maculatus ◽  
Thermal Sensitivity ◽  
Postembryonic Development ◽  
Confocal Imaging ◽  
Temperature Dependent ◽  
Destructive Sampling ◽  
Thermal Thresholds ◽  
Seed Beetle ◽  
Thermal Plasticity ◽  
Cowpea Seed

Abstract Background The thermal plasticity of life-history traits receives wide attention in the recent biological literature. Of all the temperature-dependent traits studied, developmental rates of ectotherms are especially often addressed, and yet surprisingly little is known about embryonic responses to temperature, including changes in the thermal thresholds and thermal sensitivity during early development. Even postembryonic development of many cryptically living species is understood superficially at best. Results This study is the first to estimate the exact durations of developmental stages in the cowpea seed beetle C. maculatus from oviposition to adult emergence at five permissive constant temperatures from 20 to 32 °C. Early embryonic development was tracked and documented by means of destructive sampling and subsequent confocal imaging of fluorescently stained specimens. Late embryonic and early larval development was studied with the use of destructive sampling and light microscopy. Well-resolved temporal series based on thousands of embryos allowed precise timing of the following developmental events: formation of the blastoderm; formation, elongation, and retraction of the germ band; dorsal closure; the onset and completion of sclerotization of the cuticle; hatching, and penetration of the first-instar larva into the cowpea seed. Pupation and adult eclosion were observed directly through an incision in the seed coat. The thermal phenotype of C. maculatus was found to vary in the course of ontogeny and different stages scaled disproportionately with temperature, but pitfalls and caveats associated with analyses of relative durations of individual stages are also briefly discussed. Conclusion Disproportionate changes in developmental durations with temperature may have important implications when study design requires a high degree of synchronization among experimental embryos or when the occurrence of particular stages in the field is of interest, as well as in any other cases when development times need to be estimated with precision. This work provides one of the first examples of integration of embryological techniques with ecophysiological concepts and will hopefully motivate similar projects in the future. While experiments with Drosophila continue to be the main source of information on animal development, knowledge on other model species is instrumental to building a broader picture of developmental phenomena.

scholarly journals Sexual conflict and correlated evolution between male persistence and female resistance traits in the seed beetle Callosobruchus maculatus

2017 ◽  
Vol 284 (1855) ◽  
pp. 20170132 ◽  
Author(s):  
Liam R. Dougherty ◽  
Emile van Lieshout ◽  
Kathryn B. McNamara ◽  
Joe A. Moschilla ◽  
Göran Arnqvist ◽  
...  
Keyword(s):  
Sexual Conflict ◽  
Male Genitalia ◽  
Callosobruchus Maculatus ◽  
Negative Relationship ◽  
Female Reproductive Tract ◽  
Female Resistance ◽  
Correlated Evolution ◽  
Male And Female ◽  
Seed Beetle ◽  
Trade Offs

Traumatic mating (or copulatory wounding) is an extreme form of sexual conflict whereby male genitalia physically harm females during mating. In such species females are expected to evolve counter-adaptations to reduce male-induced harm. Importantly, female counter-adaptations may include both genital and non-genital traits. In this study, we examine evolutionary associations between harmful male genital morphology and female reproductive tract morphology and immune function across 13 populations of the seed beetle Callosobruchus maculatus . We detected positive correlated evolution between the injuriousness of male genitalia and putative female resistance adaptations across populations. Moreover, we found evidence for a negative relationship between female immunity and population productivity, which suggests that investment in female resistance may be costly due to the resource trade-offs that are predicted between immunity and reproduction. Finally, the degree of female tract scarring (harm to females) was greater in those populations with both longer aedeagal spines and a thinner female tract lining. Our results are thus consistent with a sexual arms race, which is only apparent when both male and female traits are taken into account. Importantly, our study provides rare evidence for sexually antagonistic coevolution of male and female traits at the within-species level.

Colonization of Marginal Host Plants by Seed Beetles (Coleoptera: Chrysomelidae): Effects of Geographic Source and Genetic Admixture

2020 ◽  
Vol 49 (4) ◽  
pp. 938-946
Author(s):  
Frank J Messina ◽  
Alexandra M Lish ◽  
Amy Springer ◽  
Zachariah Gompert
Keyword(s):  
Callosobruchus Maculatus ◽  
Larval Survival ◽  
Genetic Admixture ◽  
Parental Line ◽  
Long Distance ◽  
Asian Populations ◽  
Long Distance Transport ◽  
Novel Host ◽  
Colonization Success ◽  
Seed Beetles

Abstract The ability to adapt to a novel host plant may vary among insect populations with different genetic histories, and colonization of a marginal host may be facilitated by genetic admixture of disparate populations. We assembled populations of the seed beetle, Callosobruchus maculatus (F.), from four continents, and compared their ability to infest two hosts, lentil and pea. We also formed two cross-continent hybrids (Africa × N.A. and Africa × S.A.). In pre-selection assays, survival was only ~3% in lentil and ~40% in pea. For three replicate populations per line, colonization success on lentil was measured as cumulative exit holes after 75–175 d. On pea, we estimated the change in larval survival after five generations of selection. Females in all lines laid few eggs on lentil, and survival of F1 larvae was uniformly <5%. Subsequently, however, the lines diverged considerably in population growth. Performance on lentil was highest in the Africa × N.A. hybrid, which produced far more adults (mean > 11,000) than either parental line. At the other extreme, Asian populations on lentil appeared to have gone extinct. The Africa × N.A. line also exhibited the highest survival on pea, and again performed better than either parent line. However, no line displayed a rapid increase in survival on pea, as is sometimes observed on lentil. Our results demonstrate that geographic populations can vary substantially in their responses to the same novel resource. In addition, genetic admixtures (potentially caused by long-distance transport of infested seeds) may facilitate colonization of an initially poor host.

scholarly journals Mating Changes Sexually Dimorphic Gene Expression in the Seed Beetle Callosobruchus maculatus

2017 ◽  
Vol 9 (3) ◽  
pp. 677-699 ◽  
Author(s):  
Elina Immonen ◽  
Ahmed Sayadi ◽  
Helen Bayram ◽  
Göran Arnqvist
Keyword(s):  
Gene Expression ◽  
Callosobruchus Maculatus ◽  
Sexually Dimorphic ◽  
Seed Beetle ◽  
Dimorphic Gene Expression
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