An attempt to solve the taxonomic confusion of Thlaspiceras F.K.Mey. complex (Noccaea Moench-Brassicaceae) with ISSRs

Abstract

Meyer separated Thlaspi into 12 genera, specifically using the seed-coat anatomy. Currently, only 4 species have been retainedin Thlaspi s.str and all of the other species were divided into other genera, one of which was Thlaspiceras F.K.Mey.. Based on recentmolecular studies and morphological features, Al-Shehbaz (2014) suggested recognizing all of Meyer’s segregates under Noccaeaand Thlaspi s.str. All of Meyer’s Thlaspiceras species, namely Th. dolichocarpum (Zohary) F.K.Mey., Th. eigii (Zohary) F.K.Mey., Th.crassifolium A.Huber-Morath andF.K.Mey., Th. bovis F.K.Mey., Th. oxyceras (Boiss.) F.K.Mey., Th. capricornutum F.K.Mey., Th. hubermorathii F.K.Mey., Th. cappadocicum (Boiss. and Balansa) F.K.Mey., Th. triangulare F.K.Mey., Th. rechingeri F.K.Mey., and Th. elegans(Boissier) F.K.Mey., grow in Turkey or on the Syrian side of the border between Turkey and Syria. Meyer classified Thlaspiceras taxa under3 sections: Dolichocarpa F.K.Mey., Thlaspiceras, and Acornuta F.K.Mey.. The current study makes use of the above mentioned species,except for Th. oxyceras, Th. capricornutum F.K.Mey., Th. dolichocarpum (Zohary) F.K.Mey., and Th. bovis F.K.Mey. The plant materialsused in this research were collected in Turkey between 2014 and 2016. Specimens were identified according to Meyer’s identification andnamed according to Meyer. A total of 12 inter-simple sequence repeat (ISSR) primers, with 52 reliable polymorphic bands, were used inthe cluster analyses. The dendrogram obtained supported all of the previously proposed classifications. A detailed discussion regardingprevious classifications of the group and the clusters revealed using the ISSR markers is also provided herein.