Genetic variation and hybridization between Lotus corniculatus L. and L. stepposus Kramina (Leguminosae) in Russia and Ukraine: evidence from ISSR marker patterns and morphology

Kramina, T.E.

Автор: Kramina T.E.
Журнал: Wulfenia
Том: 20
Год издания: 2013
Издательство: Botanischer Garten des Landes Karnten
Местоположение издательства: Austria
Первая страница: 81
Последняя страница: 100
Аннотация: Summary: A study of genetic diversity of inter-simple sequence repeat (ISSR) markers and morphological variation was conducted in 24 populations of Lotus corniculatus L. (Co), L. stepposus Kramina (S) and a species of putative hybrid origin L. ucrainicus Klok. (U) from European Russia and Ukraine. The study revealed that individuals of L. ucrainicus are characterized by a transitional morphology between L. corniculatus and L. stepposus. Analysis of ISSR banding patterns demonstrated that L. ucrainicus shared the majority of species-exclusive bands (i.e. those presented in one parental species only) from both presumed parental species and mainly had an intermediate band frequency of species-typical markers (i.e. those with differentiated band frequencies between parental species) as compared to L. corniculatus and L. stepposus. Bayesian analysis by Structure program suggested a presence of two (Co and S) or three species (Co, S and U) as the most probable population structure. In the first case, individuals of L. ucrainicus were genetically admixed. Analysis of molecular variance of ISSR data indicated highly significant genetic differentiation among species and among as well as within populations (p = 0.00000). A gene flow among studied Lotus species is more restricted than within each of them. As assessed by Mantel test, geographic component in genetic variation was prominent in L. stepposus (r = 0.77) and L. corniculatus (r = 0.51), while for L. ucrainicus it was not significant (r = 0.17, p = 0.188). Revealed patterns of molecular and morphological variation mainly support a hybrid origin of L. ucrainicus from parental species L. corniculatus and L. stepposus. A partially restricted bidirectional gene flow between L. corniculatus and L. stepposus through introgressive hybridization with L. ucrainicus is supposed. Keywords: Lotus, Loteae, Leguminosae, ISSR
Добавил в систему: Крамина Татьяна Евгеньевна

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Genetic variation and hybridization between Lotus corniculatus L. and L. stepposus Kramina (Leguminosae) in Russia and Ukraine: evidence from ISSR marker patterns and morphologyстатья

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