Primulina cardaminifolia (Gesneriaceae), a rare new species from limestone areas in Guangxi, China.

ABSTRACT:

Background

Primulina cardaminifolia Yan Liu & W.B. Xu (Gesneriaceae), a distinct new species with imparipinnate leaves, is described and illustrated from a limestone valley in Guangxi Zhuangzu Autonomous Region, China. To assure its generic placement and phylogenetic affinity, phylogenetic analyses were performed using DNA sequences of nuclear ITS and chloroplast trnL-F intron spacer region. Additionally, somatic chromosome number was counted and pollen stainability was tested.

Results

Phylogenetic analyses support its placement in Primulina; however, two phylogenetically distinct ITS sequence types were detected, suggesting a probable hybrid origin. Its pollen stainability is 100% and its chromosome number, 2n = 36, is congruent with all known counts of diploid species of t

SUBMITTER: Xu WB 

PROVIDER: S-EPMC5432832 | biostudies-literature | 2013 Dec

REPOSITORIES: biostudies-literature