SNPs summary at position 17, 64, 70 and 137 of 114 LWS opsin homologs from 54 species representin... more SNPs summary at position 17, 64, 70 and 137 of 114 LWS opsin homologs from 54 species representing 12 insect orders. (XLSX 26 kb)
ary divergence of Brassica and Arabidop-sis, such as aberrant maturation of the Bras-sica SRK pro... more ary divergence of Brassica and Arabidop-sis, such as aberrant maturation of the Bras-sica SRK protein in A. thaliana stigmas or its inability to interact productively with Arabidopsis-derived downstream targets. The large number of genetically well-characterized S haplotypes that are available in Brassica species has been critical for iden-tification of the SRK and SCR SI recognition proteins. However, the relatively laborious transformation methods and rudimentary state of genome studies in Brassica make further studies of the SI response difficult. The availability of A. thaliana strains that express SI provides new opportunities for exploiting the tools of this tractable model plant for structure-function studies of SRK and SCR as well as for the genetic and mo-lecular dissection of the SRK-mediated signal transduction pathway.
The major goal of ecological evolutionary developmental biology, also known as “eco-evo-devo, ” i... more The major goal of ecological evolutionary developmental biology, also known as “eco-evo-devo, ” is to uncover the rules that underlie the interactions between an organism’s environment, genes, and development and to incorporate these rules into evolutionary theory. In this chapter, we discuss some key and emerging concepts within eco-evo-devo. These concepts show that the environment is a source and inducer of genotypic and phenotypic variation at multiple levels of biological organization, while development acts as a regulator that can mask, release, or create new combinations of variation. Natural selection can subsequently fix this variation, giving rise to novel phenotypes. Combining the approaches of eco-evo-devo and ecological genomics will mutually enrich these fields in a way that will not only enhance our understanding of evolution, but also of the genetic mechanisms underlying the responses of organisms to their natural environments.
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2018
Ants evolved about 140 million years ago and have diversified into more than 15,000 species with ... more Ants evolved about 140 million years ago and have diversified into more than 15,000 species with tremendous ecological and morphological diversity, yet evolution of the gene regulatory networks (GRNs) underlying this diversification remains poorly understood. Wing polyphenism, the ability of a single genome to produce either winged or wingless castes during development in response to environmental cues, is a nearly universal feature of ants. The underlying wing GRN is evolutionarily labile in worker castes of phylogenetically derived species: it is conserved in winged castes but interrupted at different points in wingless castes of different species. However, it remains unknown whether the wing GRN is interrupted in wingless castes of species from early branching lineages, and if so, whether it is interrupted at similar locations in worker castes of derived species. We therefore used in situ hybridization to assay the expression of nine genes in the wing GRN in wing imaginal discs o...
SNPs summary at position 17, 64, 70 and 137 of 114 LWS opsin homologs from 54 species representin... more SNPs summary at position 17, 64, 70 and 137 of 114 LWS opsin homologs from 54 species representing 12 insect orders. (XLSX 26 kb)
ary divergence of Brassica and Arabidop-sis, such as aberrant maturation of the Bras-sica SRK pro... more ary divergence of Brassica and Arabidop-sis, such as aberrant maturation of the Bras-sica SRK protein in A. thaliana stigmas or its inability to interact productively with Arabidopsis-derived downstream targets. The large number of genetically well-characterized S haplotypes that are available in Brassica species has been critical for iden-tification of the SRK and SCR SI recognition proteins. However, the relatively laborious transformation methods and rudimentary state of genome studies in Brassica make further studies of the SI response difficult. The availability of A. thaliana strains that express SI provides new opportunities for exploiting the tools of this tractable model plant for structure-function studies of SRK and SCR as well as for the genetic and mo-lecular dissection of the SRK-mediated signal transduction pathway.
The major goal of ecological evolutionary developmental biology, also known as “eco-evo-devo, ” i... more The major goal of ecological evolutionary developmental biology, also known as “eco-evo-devo, ” is to uncover the rules that underlie the interactions between an organism’s environment, genes, and development and to incorporate these rules into evolutionary theory. In this chapter, we discuss some key and emerging concepts within eco-evo-devo. These concepts show that the environment is a source and inducer of genotypic and phenotypic variation at multiple levels of biological organization, while development acts as a regulator that can mask, release, or create new combinations of variation. Natural selection can subsequently fix this variation, giving rise to novel phenotypes. Combining the approaches of eco-evo-devo and ecological genomics will mutually enrich these fields in a way that will not only enhance our understanding of evolution, but also of the genetic mechanisms underlying the responses of organisms to their natural environments.
Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2018
Ants evolved about 140 million years ago and have diversified into more than 15,000 species with ... more Ants evolved about 140 million years ago and have diversified into more than 15,000 species with tremendous ecological and morphological diversity, yet evolution of the gene regulatory networks (GRNs) underlying this diversification remains poorly understood. Wing polyphenism, the ability of a single genome to produce either winged or wingless castes during development in response to environmental cues, is a nearly universal feature of ants. The underlying wing GRN is evolutionarily labile in worker castes of phylogenetically derived species: it is conserved in winged castes but interrupted at different points in wingless castes of different species. However, it remains unknown whether the wing GRN is interrupted in wingless castes of species from early branching lineages, and if so, whether it is interrupted at similar locations in worker castes of derived species. We therefore used in situ hybridization to assay the expression of nine genes in the wing GRN in wing imaginal discs o...
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Papers by Ehab Abouheif