« Previous AbstractDetermination of oxygenated volatile organic compounds in ambient air using canister collection-gas chromatography/mass spectrometry    Next Abstract"Olfaction, pheromones and life" »

Mol Ecol

Title:		Geographical parthenogenesis in the brown alga Scytosiphon lomentaria (Scytosiphonaceae): Sexuals in warm waters and parthenogens in cold waters
Author(s):		Hoshino M; Hiruta SF; Croce ME; Kamiya M; Jomori T; Wakimoto T; Kogame K;
Address:		"Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo, Japan. Department of Algal Development and Evolution, Max Planck Institute for Developmental Biology, Tubingen, Germany. Center for Molecular Biodiversity Research, National Museum of Nature and Science, Tsukuba, Japan. Instituto Argentino de Oceanografia, CONICET-Bahia Blanca, Bahia Blanca, Argentina. Departamento de Biologia, Bioquimica y Farmacia, Universidad Nacional del Sur, Bahia Blanca, Argentina. Department of Ocean Sciences, Tokyo University of Marine Science and Technology, Tokyo, Japan. Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo, Japan. Department of Biological Sciences, Faculty of Science, Hokkaido University, Sapporo, Japan"
Journal Title:		Mol Ecol
Year:		2021
Volume:		20210906
Issue:		22
Page Number:		5814 - 5830
DOI:		10.1111/mec.16152
ISSN/ISBN:		1365-294X (Electronic) 0962-1083 (Linking)
Abstract:		"Geographical parthenogenesis, a phenomenon where parthenogens and their close sexual relatives inhabit distinct geographical areas, has been considered an interesting topic in evolutionary biology. Reports of geographical parthenogenesis from land and freshwater are numerous, but this occurrence has been rarely reported from the sea. Brown algae are mostly marine and are thought to include numerous obligate parthenogens; still, little is known about the distribution, origin and evolution of parthenogens in this group. Here we report a novel pattern of geographical parthenogenesis in the isogamous brown alga Scytosiphon lomentaria. Sex ratio investigation demonstrated that, in Japan, sexual populations grew in the coast along warm ocean currents, whereas female-dominant parthenogenetic populations grew mainly in the coast along a cold ocean current. In the two localities where sexual and parthenogenetic populations were parapatric, parthenogens grew in more wave-exposed areas than sexuals. Population genetic and phylogenetic analyses, including those based on genome-wide single nucleotide polymorphism data, indicated that parthenogens have initially evolved at least twice and subsequent hybridizations between the parthenogens and sexuals have generated multiple new parthenogenetic lineages. The origin of the initial parthenogens is not clear, except that it would not be interspecies hybridization. Interestingly, we found that the production of sex pheromones, which attract male gametes, has been independently lost in the initial two parthenogenetic lineages. This parallel loss of the sexual trait may represent the direct origin of parthenogens, or the regressive evolution of a useless trait under asexuality"
Keywords:		"Female Humans Hybridization, Genetic Male Parthenogenesis/genetics *Phaeophyta Phylogeny *Reproduction MIG-seq brown algae geographical parthenogenesis parthenogenesis single nucleotide polymorphism;"
Notes:		"MedlineHoshino, Masakazu Hiruta, Shimpei F Croce, Maria Emilia Kamiya, Mitsunobu Jomori, Takahiro Wakimoto, Toshiyuki Kogame, Kazuhiro eng MIKIMOTO FUND FOR MARINE ECOLOGY/ KAKENHI/JP19J10967/Japan Society for the Promotion of Science/ KAKENHI/JP19K06817/Japan Society for the Promotion of Science/ Research Support, Non-U.S. Gov't England 2021/08/27 Mol Ecol. 2021 Nov; 30(22):5814-5830. doi: 10.1111/mec.16152. Epub 2021 Sep 6"