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Ukr. Bot. J. 2014, 71(4): 471–480
https://doi.org/10.15407/ukrbotj71.04.471
Plant Taxonomy, Geography and Floristics

Integrated assessment of the state of steppe perennial plant populations in Ukraine as exemplified by Iris pumila

I. Parnikoza¹, O. Bublyk¹, I. Andreev¹, K. Spiridonova¹, J. Gołębiewska³, M. Kubiak³, A. Kuczyńska³, K. Mystkowska³, N. Olędrzyńska³, B. Urasińska³, M. Górniak³, A. Ślęzak-Parnikoza³, K. Wojciehowski4, Y. Didukh², V. Kunakh¹
Abstract

For the model steppe perennial species of Ukrainian flora, Iris pumila, the factors were studied that may indicate a threat of genetic erosion including the level of intraspecific differentiation, population parameters and spatial isolation, ecological amplitude of the species, anthropogenic influence, genetic diversity as assessed by ISSR-markers and chloroplast sequences. Low intraspecific differentiation of I. pumila on the territory of Ukraine, narrow ecological amplitude, isolation and small size of populations, significant habitat fragmentation, prevalence of generative individuals and poor generative reproduction, exposure to anthropogenic effects suggest potential threat to the species. At the same time, ISSR-analysis demonstrated the high level of genetic diversity of I. pumila along with low differentiation of geographically distant populations, while analysis of chloroplast sequences revealed three specific plastid haplotypes. These suggest that the species have still retained substantial genetic variability despite the deterioration of ecological and population indices. Overall, our study clearly shows the need for integrated approach to assess the risk of depletion of specific species gene pool and its extinction.

Keywords: Iris pumila, steppe perennials, taxonomy, genetic erosion, isolation

Full text: PDF (Ukr) 1.12M

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