{"title":"The life history fitness of F1 hybrids of the microcrustaceans Daphnia pulex and Daphnia pulicaria (Crustacea, Anomopoda)","authors":"Irene Moy, Makayla Green, Thinh Phu Pham, Dustin Huy-Khang Luu, Sen Xu","doi":"10.1111/ivb.12333","DOIUrl":null,"url":null,"abstract":"<p>Negative interaction between alleles that arise independently in diverging populations (i.e., Dobzhansky–Muller incompatibilities) can cause reduction of fitness in their hybrids. However, heterosis in hybrids can emerge if hybridization breaks down detrimental epistatic interaction within parental lineages. In this study, we examined the life history fitness of the interspecific F<sub>1</sub>s of two recently diverged microcrustacean species, <i>Daphnia pulex</i> and <i>D. pulicaria</i>, as well as intraspecific crosses of <i>D. pulex</i>. We identified heterosis in two of five life history traits in the interspecific F<sub>1</sub>s. According to theories that heterosis can transiently emerge in early speciation, the observation of heterosis in these life history traits suggests that there are no major genetic incompatibilities between these two species affecting these traits and that <i>D. pulex</i> and <i>D. pulicaria</i> are at an early stage of speciation.</p>","PeriodicalId":54923,"journal":{"name":"Invertebrate Biology","volume":"140 2","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2021-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1111/ivb.12333","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Invertebrate Biology","FirstCategoryId":"99","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/ivb.12333","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Negative interaction between alleles that arise independently in diverging populations (i.e., Dobzhansky–Muller incompatibilities) can cause reduction of fitness in their hybrids. However, heterosis in hybrids can emerge if hybridization breaks down detrimental epistatic interaction within parental lineages. In this study, we examined the life history fitness of the interspecific F1s of two recently diverged microcrustacean species, Daphnia pulex and D. pulicaria, as well as intraspecific crosses of D. pulex. We identified heterosis in two of five life history traits in the interspecific F1s. According to theories that heterosis can transiently emerge in early speciation, the observation of heterosis in these life history traits suggests that there are no major genetic incompatibilities between these two species affecting these traits and that D. pulex and D. pulicaria are at an early stage of speciation.
期刊介绍：
Invertebrate Biology presents fundamental advances in our understanding of the structure, function, ecology, and evolution of the invertebrates, which represent the vast majority of animal diversity. Though ultimately organismal in focus, the journal publishes manuscripts addressing phenomena at all levels of biological organization. Invertebrate Biology welcomes manuscripts addressing the biology of invertebrates from diverse perspectives, including those of:
• genetics, cell, and molecular biology
• morphology and biomechanics
• reproduction and development
• physiology and behavior
• ecology
• evolution and phylogenetics
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