Disparate genetic variants associated with distinct components of cowpea resistance to the seed beetle Callosobruchus maculatus

Messina, Frank J.; Lish, Alexandra M; Gompert, Zachariah

doi:10.1007/s00122-021-03856-5

Cited by 3 publications

(7 citation statements)

References 85 publications

(93 reference statements)

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“…We computed P values for tests of marginal epistasis using the recommended hybrid method that first implements a z-test to compute a P value and then recomputes the P value with the Davies method if the initial values is less than 0.05 (as in ref. 18 ).…”

Section: Methodsmentioning

confidence: 99%

“…Thus, we conducted additional analyses using the BSLMM approach from gemma to test for associations between M. sativa and L. melissa genetics and caterpillar performance, but where we included pairwise epistatic effects among SNPs with the most evidence of marginal epistasis from the MAPIT analyses (similar to ref. 18 ). Our goal was to ask whether including these additional epistatic terms improved the explanatory power of the model.…”

Section: Methodsmentioning

confidence: 99%

“…More recently, evolutionary geneticists have taken advantage of new technologies to explore the genetic basis of herbivory in a genomic context. With very few exceptions, these studies have focused on genetic variation in either herbivores or plants [14][15][16][17](but see [18]), but rarely both in the same study and never to our knowledge paired with modern metabolomic approaches that allow for untargeted discovery of influential compounds [19]. This leaves us with considerable uncertainty concerning the relative importance of heritable traits in herbivores and in plants for determining the outcome of plant-insect interactions.…”

Section: Introductionmentioning

confidence: 99%

“…With very few exceptions, these studies have focused on genetic variation in either herbivores or plants (refs. 15 – 19 ; but see ref. 20 ), but rarely both in the same study and never, to our knowledge, paired with modern metabolomic approaches that allow for untargeted discovery of influential compounds ( 21 ).…”

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confidence: 99%

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Additive genetic effects in interacting species jointly determine the outcome of caterpillar herbivory

Gompert

Saley

Philbin

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Plant–insect interactions are common and important in basic and applied biology. Trait and genetic variation can affect the outcome and evolution of these interactions, but the relative contributions of plant and insect genetic variation and how these interact remain unclear and are rarely subject to assessment in the same experimental context. Here, we address this knowledge gap using a recent host-range expansion onto alfalfa by the Melissa blue butterfly. Common garden rearing experiments and genomic data show that caterpillar performance depends on plant and insect genetic variation, with insect genetics contributing to performance earlier in development and plant genetics later. Our models of performance based on caterpillar genetics retained predictive power when applied to a second common garden. Much of the plant genetic effect could be explained by heritable variation in plant phytochemicals, especially saponins, peptides, and phosphatidyl cholines, providing a possible mechanistic understanding of variation in the species interaction. We find evidence of polygenic, mostly additive effects within and between species, with consistent effects of plant genotype on growth and development across multiple butterfly species. Our results inform theories of plant–insect coevolution and the evolution of diet breadth in herbivorous insects and other host-specific parasites.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Additive genetic effects in interacting species jointly determine the outcome of caterpillar herbivory

Gompert

Saley

Philbin

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…pest complex, the architecture of host association was spread across half of its 31 chromosomes and was linked to multiple traits including survival, feeding efficiency, and development (Oppenheim et al, 2018 ). Polygenic genomic architecture has also been shown in other adaptive traits such as eclosion time in Rhagoletis flies (Doellman et al, 2019 ; Meyers et al, 2020 ) and host resistance in Callosobruchus maculatus (Messina et al, 2021 ). Widespread genomic changes in a large number of genes have also been associated with host shifts and adaptive radiation in swallowtail butterfly lineages (Allio et al, 2021 ).…”

Section: Discussionmentioning

confidence: 99%

Host association, environment, and geography underlie genomic differentiation in a major forest pest

MacDonald

Snape

Roe

et al. 2022

Evolutionary Applications

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Diverse geographic, environmental, and ecological factors affect gene flow and adaptive genomic variation within species. With recent advances in landscape ecological modelling and high‐throughput DNA sequencing, it is now possible to effectively quantify and partition their relative contributions. Here, we use landscape genomics to identify determinants of genomic differentiation in the forest tent caterpillar, Malacosoma disstria, a widespread and irruptive pest of numerous deciduous tree species in North America. We collected larvae from multiple populations across Eastern Canada, where the species experiences a diversity of environmental gradients and feeds on a number of different host tree species, including trembling aspen (Populus tremuloides), sugar maple (Acer saccharum), red oak (Quercus rubra), and white birch (Betula papyrifera). Using a combination of reciprocal causal modelling (RCM) and distance‐based redundancy analyses (dbRDA), we show that differentiation of thousands of genome‐wide single nucleotide polymorphisms (SNPs) among individuals is best explained by a combination of isolation by distance, isolation by environment (spatial variation in summer temperatures and length of the growing season), and differences in host association. Configuration of suitable habitat inferred from ecological niche models was not significantly related to genomic differentiation, suggesting that M. disstria dispersal is agnostic with respect to habitat quality. Although population structure was not discretely related to host association, our modelling framework provides the first molecular evidence of host‐associated differentiation in M. disstria, congruent with previous documentation of reduced growth and survival of larvae moved between natal host species. We conclude that ecologically mediated selection is contributing to variation within M. disstria, and that divergent adaptation related to both environmental conditions and host association should be considered in ongoing research and management of this important forest pest.

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Cowpea Constraints and Breeding in Europe

Lazaridi

Bebeli

2023

Plants

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Cowpea (Vigna unguiculata (L.) Walp.) is a legume with a constant rate of cultivation in Southern European countries. Consumer demand for cowpea worldwide is rising due to its nutritional content, while Europe is constantly attempting to reduce the deficit in the production of pulses and invest in new, healthy food market products. Although the climatic conditions that prevail in Europe are not so harsh in terms of heat and drought as in the tropical climates where cowpea is mainly cultivated, cowpea confronts with a plethora of abiotic and biotic stresses and yield-limiting factors in Southern European countries. In this paper, we summarize the main constraints for cowpea cultivation in Europe and the breeding methods that have been or can be used. A special mention is made of the availability plant genetic resources (PGRs) and their potential for breeding purposes, aiming to promote more sustainable cropping systems as climatic shifts become more frequent and fiercer, and environmental degradation expands worldwide.

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Disparate genetic variants associated with distinct components of cowpea resistance to the seed beetle Callosobruchus maculatus

Abstract: Polygenic genome-wide association mapping identified two regions of the cowpea genome associated with different components of resistance to its major post-harvest pest, the seed beetle Callosobruchus maculatus.

Cited by 3 publications

References 85 publications

Additive genetic effects in interacting species jointly determine the outcome of caterpillar herbivory

Additive genetic effects in interacting species jointly determine the outcome of caterpillar herbivory

Host association, environment, and geography underlie genomic differentiation in a major forest pest

Cowpea Constraints and Breeding in Europe

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