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http://dx.doi.org/10.11110/kjpt.2019.49.4.300

Taxonomic study on infraspecific taxa of Lespedeza maximowiczii and hybrids with related species  

JIN, Dong-Pil (Department of Biological Sciences, Inha University)
PARK, Jong-Won (Department of Biological Sciences, Inha University)
CHOI, Byoung-Hee (Department of Biological Sciences, Inha University)
Publication Information
Korean Journal of Plant Taxonomy / v.49, no.4, 2019 , pp. 300-318 More about this Journal
Abstract
Many infraspecific taxa within Lespedeza maximowiczii and hybrids with related species have been described, but taxonomic verification remains controversial. We examined the morphological traits of hybrids (L. chiisanensis and L. patentibicolor) and infraspecific taxa (var. tomentella, elongata, and tricolor) and analyzed their genetic structures using microsatellite loci. Flower and leaflet shapes in var. tomentella and elongata were within the range of variation of those in var. maximowiczii, and individuals in the two former varieties were grouped into var. maximowiczii. Lespedeza maximowiczii var. tricolor was similar to L. buergeri in terms of the structure and flower color, whereas the leaflet and bracteole shapes of var. tricolor were similar to those of var. maximowiczii. Based on the genetic structure (K = 3), var. tricolor had a mixed lineage with L. maximowiczii and L. buergeri. In addition, these formed a distinct lineage at K = 5. For two hybrids, the flower and leaflet structure in L. chiisanensis did not differ from those in L. maximowiczii, whereas the flowers of L. patentibicolor were within the range of variation of L. bicolor. In addition, L. chiisanensis and L. patentibicolor were assigned to L. maximowiczii and L. bicolor, respectively, based on the genetic structure. We treated var. tomentella and elongata as a forma, f. friebeana, because L. friebeana preceded var. tomentella, whereas var. tricolor was treated as a distinct species, L. tricolor. Lespedeza chiisanensis was recognized as a synonym of L. maximowiczii. Lespedeza patentibicolor was considered to be L. bicolor.
Keywords
Hybrid; infraspecific taxa; Lespedeza maximowiczii; morphological variation; microsatellites; taxonomic treatment;
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