Preprint Article Version 2 Preserved in Portico This version is not peer-reviewed

Morphological and Molecular Status of Daphne Wolongensis Brickell et Mathew as Genetic Resource for Horticulture

Version 1 : Received: 9 September 2020 / Approved: 11 September 2020 / Online: 11 September 2020 (06:08:28 CEST)
Version 2 : Received: 14 September 2020 / Approved: 16 September 2020 / Online: 16 September 2020 (03:12:31 CEST)

How to cite: Holubec, V.; Leišová-Svobodová, L. Morphological and Molecular Status of Daphne Wolongensis Brickell et Mathew as Genetic Resource for Horticulture. Preprints 2020, 2020090243 (doi: 10.20944/preprints202009.0243.v2). Holubec, V.; Leišová-Svobodová, L. Morphological and Molecular Status of Daphne Wolongensis Brickell et Mathew as Genetic Resource for Horticulture. Preprints 2020, 2020090243 (doi: 10.20944/preprints202009.0243.v2).

Abstract

Daphne wolongensis described on the basis of a few known individuals was investigated in the wild, in Baoxing Valey, Sechuan. Its status of valid species was verified morphologically and genetically. Three newly found populations were compared to the closely related species Daphne retusa, D. tangutica, D. longilobata, D. acutiloba, D. sureil, to clones available in cultivation and selected cultivars. The high bootstrap values indicate a good level of genetic differentiation between each of the studied species. The hypothesis whether D. wolongensis is a hybridogenous species was rejected, it is a well-defined independent species. Based on morphological and genetic data, it seems likely that another species, D. limprichtii can be a mountain form of D. tangutica. Variability of populations in Wolong gives a good opportunity to select genotypes with a higher or better performance of combination of traits. From 51samples collected in Wolong it was possible to select the top ten different types as genetic resources for breeding. Daphne wolongensis, in the visited sites of Wolong area, occupies less than 1 km2. Together with isolated finds, the number of found individuals is less than 500 and the area is not larger than 10 km2, thus it falls to the IUCN category of “Critically Endangered” plants.

Subject Areas

Daphne wolongensis; distribution; morphology; relationships; genetics; AFLP; related species; Rehdera section

Comments (1)

Comment 1
Received: 16 September 2020
Commenter: Vojtech Holubec
Commenter's Conflict of Interests: Author
Comment: added tables and pictures
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