PMID: 22567996May 10, 2012Paper

Genetic diversity of a rare species Aristolochia contorta bungae (aristolochiaceae) in Primorsky Krai

Genetika
O V NakonechnaiaIu N Zhuravlev

Abstract

The herbaceous vine, twisted birthwort Aristolochia contorta Bunge, is a rare species listed in the Red Data Book of Primorsky krai (2008). On the northern boundary of its range (south of the Russian Far East), the species is represented by small isolated populations confined to the river drainages. Using allozyme analysis, genetic variation of nine natural populations ofA. contorta (247 accessions), which represented the main part of the species range in Russia, was examined. The values of genetic variation indices (P = 22.7%; A = 1.28; Ho = 0.129; He = 0.101) were low and comparable with the data obtained for other rare plants. The proportion of unique genotypes (G/N) and Simpson's genotypic diversity index (D) ranged from 0.32 to 0.64 and from 0.60 to 0.98, respectively. This means that A. contorta is characterized by sexual and asexual reproduction. Moreover, the ratio between these types of reproduction varied among the populations. Complete absence of inbreeding and excess of heterozygotes (F(IS) = -0.282), which was low probable in case of free mating, was observed. Evidently, clonal growth and (or) apomixis enables the species to maintain certain level of heterozygosity despite of small population sizes and non-regular ...Continue Reading

References

Jun 22, 2000·American Journal of Botany·M A Gitzendanner, P S Soltis
Apr 23, 1982·Science·L D Gottlieb
Aug 1, 1965·The British Journal of Ophthalmology·J J Kanski
Feb 19, 2010·Sexual Plant Reproduction·Elvira Hörandl
Jun 30, 2010·Genetika·A B KholinaIu N Zhuravlev

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