The life-history fitness of F 1 hybrids of the microcrustacean Daphnia pulex and D. pulicaria (Crustacea, Anomopoda).

Autor: Moy I; Department of Biology, University of Texas at Arlington, Texas, 76019, USA., Green M; Department of Biology, University of Texas at Arlington, Texas, 76019, USA., Pham TP; Department of Biology, University of Texas at Arlington, Texas, 76019, USA., Luu D; Department of Biology, University of Texas at Arlington, Texas, 76019, USA., Xu S; Department of Biology, University of Texas at Arlington, Texas, 76019, USA.
Jazyk: angličtina
Zdroj: Invertebrate biology : a quarterly journal of the American Microscopical Society and the Division of Invertebrate Zoology/ASZ [Invertebr Biol] 2021 Jun; Vol. 140 (2). Date of Electronic Publication: 2021 Apr 20.
DOI: 10.1111/ivb.12333
Abstrakt: 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 inter-specific F 1 s of two recently diverged microcrustacean species Daphnia pulex and D. pulicaria as well as intra-specific crosses of D. pulex . We identified heterosis in two out of five life-history traits in the inter-specific F 1 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 D. pulex and D. pulicaria are at an early stage of speciation.
Databáze: MEDLINE
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