Genetic relationships between Rubus parvifolius and R. coreanus (Rosaceae), and preliminary identification one of their putative hy

Published on Jun 11, 2018 03:08 AM

Rubus parvifolius L. and R. coreanus Miq. are two
morphologically distinct, endemic wild bramble species in
East Asia.The two species are sympatric in southwest of
China. Natural hybrids between R. parvifolius and R.
coreanus do generally occur. In this study, chromosomal,
palynological, RAPD and ISSR markers were developed to
identify R. parvifolius, R. coreanus and their putative
hybrids. UPGMA model-based clustering of the genetic data
indicated that two genetic units existed in these
populations. One contained twenty-one accessions, mainly
characterized by R. parvifolius and R. coreanus with typical
morphological features (“pure”).The other was composed
of sixteen accessions, which shared an intermediate
morphology with the R. parvifolius and R. coreanus
(“hybrid”). These results showed obvious genetic
differentiation between their potential parents and among
individuals of hybrids themselves in the long evolutionary
history by several hybridization events. A triploid accession
R03-10 (2n=3x=21), was identified as a probable natural
hybrid of R. parvifolius and R. coreanus based on
morphological, chromosomal and palynological
identifications. The species R. parvifolius, an important
resource involved in the hybridization, multipolyploidization and speciation of the genus Rubus, is
discussed

Keywords: Genetic relationship, R. parvifolius L., R. coreanus Miq., putative hybrid, RAPD, ISSR

Info

Year: 2013
Volume: 73
Issue: 1
Article DOI: 10.5958/j.0019-5200.73.1.010
Print ISSN: 0019-5200
Online ISSN: 0975-6906

Authors

Yan Wang, Qing Chen, Wen He, Tao Chen, Hong Nan info_circle
Hao-ru Tang and Xiao-rong Wang info_circle

Download PDF