Reproductive compatibility of European populations of two species of Ulnaria (Bacillariophyta)
Abstract
Clones of two morphotypes corresponding to two species of pennate araphids diatoms, Ulnaria ulna and U. acus, were isolated from samples taken in Europe. Clonal cultures entered heterothallic sexual reproduction in combinations appropriate to their mating types. Following the concept of biological species, we tested reproductive compatibility between all representatives of geographically distant populations. Isolated clones turned out to be reproductively compatible within the limits of each of the species, the progeny (generation F1) were viable and fertile, freely entering into backcrossing. No cases of interspecies hybridization were found. The absence of intraspecific reproductive isolation between distant populations in these two species suggests that the populations of both U. ulna and U. acus are conspecific.
Supporting agencies: This study was performed under the state assignment of Vyazemsky Karadag Scientific Station – Nature Reserve of Russian Academy of Sciences, project number 121032300019-0.
About the Authors
Y. A. Podunay
Vyazemsky Karadag Scientific Station – Nature Reserve of Russian Academy of Sciences, Branch of A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences
Russian Federation
Russian Federation
ul. Nauki 24, p. Kurortnoe, 298188, Feodosiya
O. I. Davidovich
Vyazemsky Karadag Scientific Station – Nature Reserve of Russian Academy of Sciences, Branch of A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences
Russian Federation
Russian Federation
ul. Nauki 24, p. Kurortnoe, 298188, Feodosiya
N. A. Davidovich
Vyazemsky Karadag Scientific Station – Nature Reserve of Russian Academy of Sciences, Branch of A.O. Kovalevsky Institute of Biology of the Southern Seas, Russian Academy of Sciences
Russian Federation
Russian Federation
ul. Nauki 24, p. Kurortnoe, 298188, Feodosiya
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Review
For citations:
Podunay Y.A., Davidovich O.I., Davidovich N.A. Reproductive compatibility of European populations of two species of Ulnaria (Bacillariophyta). Vestnik Moskovskogo universiteta. Seriya 16. Biologiya. 2021;76(2):76-82. (In Russ.)
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