Biologia plantarum 53:159-163, 2009 | DOI: 10.1007/s10535-009-0025-z
Determination of genetic stability of long-term micropropagated plantlets of Platanus acerifolia using ISSR markers
- 1 Key Laboratory of Horticultural Plant Biology, Ministry of Education, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Huazhong, P.R. China
Inter-simple sequence repeat (ISSR) markers were used to assess the genetic stability of long-term micropropagated plantlets of London plane tree (Platanus acerifolia Willd.). Twenty micropropagated plantlets were chosen from a clonal collection of shoots that originated from a single mother shoot. This clonal collection had been maintained under in vitro culture conditions for at least 8 years, as achieved by axillary branch multiplication. Out of 38 ISSR primers screened, 16 primers were found to produce clear reproducible bands resulting in a total of 103 distinct bands with an average of 6.44 scorable bands per primer. Of these 103 bands, 86 were monomorphic across all 20 of the plants tested and 17 showed polymorphisms (16.5 % polymorphism). Based on the ISSR band data, similarity indices between the plantlets ranged from 0.92 to 1.00. These similarity indices were used to construct an UPGMA dendrogram and demonstrated that all 20 micropropagated plants grouped together in one major cluster with a similarity level of 91 %. A total of 1771 scorable bands were obtained from the full combination of primers and plantlets and only 51 (2.88 %) were polymorphic across the plantlets which indicates that this micropropagated line of P. acerifolia is genetically stable.
Keywords: axillary branch multiplication; dendrogram; London plane tree; molecular markers; somaclonal variation
Subjects: genetic stability; inter-simple sequence repeat (ISSR); in vitro culture, micropropagation; London plane tree; Platanus acerifolia; polymerase chain reaction (PCR)
Received: May 17, 2007; Accepted: January 5, 2008; Published: March 1, 2009 Show citation
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