Abstract
From Thuringia, Central Germany, seven presumably apomictic microspecies were described within Sorbus subgen. Tormaria (Sorbus aria × torminalis, S. latifolia group): Sorbus acutiloba, S. acutisecta, S. decipiens, S. heilingensis, S. isenacensis, S. multicrenata, and S. parumlobata. Flow cytometric ploidy estimation revealed one sample-standard ratio class for all taxa which corresponds to diploidy. As the apomixis in Sorbus is exclusive to polyploids we deduce that the sampled trees are F1 or early diploid hybrids of the combination S. aria × torminalis. The oldest name for this combination is Pyrus × decipiens Bechst. 1810 (= Sorbus × decipiens (Bechst.) Petz. & G. Kirchn.). Hence, the wide-spread presumption that the diploid hybrid Sorbus × decipiens is rare, sterile, and only scarcely found between its parents does not apply for Thuringia. Here, this taxon forms relatively dense stands and spreads by suckering and fertile seeds.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
