Morphological Variability in Populations of Chondrilla L. (Asteraceae) in European Russia

Кашин, А. С.; Петрова, Н. А.; Попова, А О; Shilova, I. V.

doi:10.18500/1816-9775-2016-16-1-80-90

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“…It is probably obligately apomictic being able to reproduce by seeds. Thorough studies of morphology, Kashin et al (2016Kashin et al ( , 2018a lead us to the conclusion that only C. ambigua is a morphologically well separated species, whereas the others are poorly differentiated and should be lumped under the name C. juncea. However, C. brevirostris, C. laticoronata and C. pauciflora seem to be somewhat morphologically separate from the latter, though their status and position remain questionable.…”

Section: Introductionmentioning

confidence: 99%

Genetic polymorphism in Chondrilla (Asteraceae) in southern European Russia and the nature of Chondrilla juncea L

Кашин

Kritskaya

Parkhomenko

et al. 2019

Nordic Journal of Botany

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We studied genetic diversity in 54 populations of nine sexual and apomictic species of the genus Chondrilla (C. acantholepis, C. ambigua, C. brevirostris, C. canescens, C. graminea, C. juncea, C. laticoronata, C. latifolia and C. pauciflora) in SE European Russia and neighboring territories of NW Kazakhstan. We analysed the trnT-trnF region of plastid DNA and the internal transcribed spacer of ribosomal DNA (ITS1-5.8S-ITS2) using statistical parsimony, maximum likelihood and neighbor net methods. Two major evolutionary lineages, roughly corresponding to the two subgenera traditionally recognized in the region, were revealed. Within the first evolutionary lineage (subgenus Brachyrhynchus), the sexual diploid C. ambigua and its putatively hybrid apomictic derivatives C. brevirostris, C. laticoronata and C. pauciflora could be recognized. Their identity was also confirmed by analyses of ISSR markers. The second evolutionary lineage (subgenus Chondrilla) comprises C. juncea, C. acantholepis, C. canescens, C. graminea and C. latifolia in European Russia, but analyses of morphological variability and the genealogy of plastid and nuclear markers favor their treatment as the single facultatively apomictic species C. juncea. The results demonstrate that an apomictic mode of reproduction does not necessarily result in the formation of genetically separated microspecies.

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Section: Introductionmentioning

confidence: 99%