Analysis of hybridization between tetraploid <Emphasis Type="Italic">Lotus corniculatus</Emphasis> and diploid <Emphasis Type="Italic">Lotus stepposus</Emphasis> (Fabaceae-Loteae): morphological and molecular aspects |
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Authors: | T E Kramina G V Degtjareva I G Meschersky |
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Institution: | (1) Department of Higher Plants, Biological Faculty, Lomonosov Moscow State University, Leniskie Gory, 1, Building 12, Moscow, 119991, Russia;(2) Botanical Garden, Biological Faculty, Lomonosov Moscow State University, Leniskie Gory, Moscow, 119991, Russia;(3) A.N. Severtsov Institute of Ecology and Evolution, Leninskij prosp., 33, Moscow, 119071, Russia |
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Abstract: | We analyzed variability of morphological characters and genetic polymorphism of inter-simple sequence repeat (ISSR) markers
in nine natural populations of three Lotus species from Eastern Europe, aiming to provide insights into the nature of the species L. ucrainicus. Nuclear ribosomal internal transcribed spacer (nrITS) was used as an additional molecular marker for a small subset of accessions.
Analysis of variance, and principal coordinate and principal component analyses were applied for morphological data study.
Cluster analysis unweighted pair-group method with arithmetic mean (UPGMA)], principal coordinate analysis, and analysis
of population genetic structure were used for ISSR pattern study. Morphological and genetic (ISSR, nrITS) evidence suggested
hybrid origin of L. × ucrainicus as a result of hybridization between tetraploid species L. corniculatus and diploid species L. stepposus. We conclude that L. × ucrainicus may represent a case of hybrid speciation in statu nascendi, occurring before our very eyes. |
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