Document Detail


Natural hybridization between Rhododendron delavayi and R. cyanocarpum (Ericaceae), from morphological, molecular and reproductive evidence.
MedLine Citation:
PMID:  20738728     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The natural hybridization that occurs between two sympatric species of Rhododendron subgenus Hymenanthes in Yunnan, China, was investigated. In field observations, it was noted that the putative hybrids between R. delavayi Franch. and R. cyanocarpum (Franch.) Franch. ex W.W. Sm. had intermediate morphologies. On the basis of morphology, chloroplast DNA (trnL-rpl32) and nuclear DNA (waxy), hybrids and parental species were identified. Hybridization occurred in both directions, but was asymmetrical, with R. delavayi as the major maternal parent. Reciprocal hand pollination treatments showed that either species, as pollen donor or pollen receiver, could produce fruits. It was noted that fruit set varied among treatments. The same pollinators (bumblebees) were shared in both parental species. From these results, we conclude that individuals with intermediate morphologies are indeed of hybrid origin from natural hybridization between R. cyanocarpum and R. delavayi. Furthermore, we presume the hybridization at the study site could have been initiated by habitat disturbance in the 1950s, and we may hence witness the early stages of hybrid swarm formation.
Authors:
Yong-Peng Ma; Chang-Qin Zhang; Jing-Li Zhang; Jun-Bo Yang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of integrative plant biology     Volume:  52     ISSN:  1744-7909     ISO Abbreviation:  J Integr Plant Biol     Publication Date:  2010 Sep 
Date Detail:
Created Date:  2010-08-26     Completed Date:  2010-12-23     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101250502     Medline TA:  J Integr Plant Biol     Country:  China (Republic : 1949- )    
Other Details:
Languages:  eng     Pagination:  844-51     Citation Subset:  IM    
Affiliation:
Kunming Botanic Garden, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China.
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MeSH Terms
Descriptor/Qualifier:
DNA, Chloroplast / genetics
Hybridization, Genetic*
Pollen
Reproduction
Rhododendron / genetics,  physiology*
Chemical
Reg. No./Substance:
0/DNA, Chloroplast

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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