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• W2021668049 endingPage "2240" @default.
• W2021668049 startingPage "2221" @default.
• W2021668049 abstract "Many sedentary, clonal marine invertebrates compete intensively with conspecifics for habitable space. Allorecognition systems mediate the nature and outcome of these intraspecific competitive interactions, such that the initiation of agonistic behavior and the potential for intergenotypic fusion depend strongly on the relatedness of the contestants. The dependence of these behaviors on relatedness, along with the extraordinary precision with which self can be discriminated from nonself, suggest that allorecognition systems are highly polymorphic genetically. However, allotypic specificity of this sort could be produced by any number of genetic scenarios, ranging from relatively few loci with abundant allelic variation to numerous loci with relatively few alleles per locus. At this point, virtually nothing is known of the formal genetics of allorecognition in marine invertebrates; consequently, the evolutionary dynamics of such systems remain poorly understood. In this paper, we characterize the formal genetics of allorecognition in the marine hydrozoan Hydractinia symbiolongicarpus. Hydractinia symbiolongicarpus colonizes gastropod shells occupied by hermit crabs. When two or more individuals grow into contact, one of three outcomes ensues: fusion (compatibility), transitory fusion (a temporary state of compatibility), and rejection (incompatibility, often accompanied by the production of agonistic structures termed hyperplastic stolons). Observed patterns of compatibility between unrelated, half‐sib pairs, and full‐sib pairs show that unrelated and half‐sib pairs under laboratory culture have a very low probability of being fusible, whereas full sibs have a roughly 30% rate of fusion in experimental pairings. The genetic simulations indicate that roughly five loci, with 5–7 alleles per locus, confer specificity in this species. In ecological terms, the reproductive ecology of H. symbiolongicarpus should promote the cosettlement of kin, some of which should be full sibs, and some half sibs. Thus, there is potential for kin selection to play a major role in the evolution of the H. symbiolongicarpus allorecognition system. In genetic terms, this system conforms to theoretical predictions for a recognition system selected to distinguish among classes of kin, in addition to self from nonself." @default.
• W2021668049 created "2016-06-24" @default.
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• W2021668049 date "1996-12-01" @default.
• W2021668049 modified "2023-10-13" @default.
• W2021668049 title "EVOLUTIONARY GENETICS OF ALLORECOGNITION IN THE COLONIAL HYDROID <i>HYDRACTINIA SYMBIOLONGICARPUS</i>" @default.
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• W2021668049 doi "https://doi.org/10.1111/j.1558-5646.1996.tb03612.x" @default.
• W2021668049 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28565652" @default.
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