scholarly journals Dynamics of genomic change during evolutionary rescue in the seed beetle Callosobruchus maculatus

2019 ◽  
Vol 28 (9) ◽  
pp. 2136-2154 ◽  
Author(s):  
Alexandre Rêgo ◽  
Frank J. Messina ◽  
Zachariah Gompert
Keyword(s):  
Callosobruchus Maculatus ◽  
Genomic Change ◽  
Seed Beetle ◽  
Evolutionary Rescue

scholarly journals Dynamics of genomic change during evolutionary rescue in the seed beetle Callosobruchus maculatus

2018 ◽  
Author(s):  
Alexandre Rêgo ◽  
Frank J. Messina ◽  
Zachariah Gompert
Keyword(s):  
Evolutionary Dynamics ◽  
Callosobruchus Maculatus ◽  
Population Decline ◽  
Survival Rates ◽  
Frequency Change ◽  
Genomic Change ◽  
Seed Beetle ◽  
Multiple Loci ◽  
Evolutionary Changes ◽  
Evolutionary Rescue

AbstractRapid adaptation can prevent extinction when populations are exposed to extremely marginal or stressful environments. Factors that affect the likelihood of evolutionary rescue from extinction have been identified, but much less is known about the evolutionary dynamics (e.g., rates and patterns of allele frequency change) and genomic basis of successful rescue, particularly in multicellular organisms. We conducted an evolve-and-resequence experiment to investigate the dynamics of evolutionary rescue at the genetic level in the cowpea seed beetle, Callosobruchus maculatus, when it is experimentally shifted to a stressful host plant, lentil. Low survival (∼1%) at the onset of the experiment caused population decline. But adaptive evolution quickly rescued the population, with survival rates climbing to 69% by the F5 generation and 90% by the F10 generation. Population genomic data showed that rescue likely was caused by rapid evolutionary change at multiple loci, with many alleles fixing or nearly fixing within five generations of selection on lentil. Selection on these loci was only moderately consistent in time, but parallel evolutionary changes were evident in sublines formed after the lentil line had passed through a bottleneck. By comparing estimates of selection and genomic change on lentil across five independent C. maculatus lines (the new lentil-adapted line, three long-established lines, and one case of failed evolutionary rescue), we found that adaptation on lentil occurred via somewhat idiosyncratic evolutionary changes. Overall, our results suggest that evolutionary rescue in this system can be caused by very strong selection on multiple loci driving rapid and pronounced genomic change.

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.

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

Genetic Modification of Host Acceptance by a Seed Beetle, Callosobruchus maculatus (Coleoptera: Bruchidae)

2009 ◽  
Vol 102 (1) ◽  
pp. 181-188 ◽  
Author(s):  
Frank J. Messina ◽  
Jake C. Jones ◽  
Michelle Mendenhall ◽  
Amberleigh Muller
Keyword(s):  
Genetic Modification ◽  
Callosobruchus Maculatus ◽  
Host Acceptance ◽  
Seed Beetle

The function of multiple mating in oviposition and egg maturation in the seed beetle Callosobruchus maculatus

2007 ◽  
Vol 32 (2) ◽  
pp. 150-156 ◽  
Author(s):  
HSIEN-FEN TSENG ◽  
ROU-LING YANG ◽  
CHAN LIN ◽  
SHWU-BIN HORNG
Keyword(s):  
Callosobruchus Maculatus ◽  
Multiple Mating ◽  
Seed Beetle ◽  
Egg Maturation
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