title: Genetic diversity of worldwide Jerusalem  artichoke (Helianthus tuberosus) germplasm as  revealed by RAPD markers.
abstract: Jerusalem artichoke (Helianthus tuberosus) is a  wild relative of the cultivated sunflower (H. annuus); it is an old  tuber crop that has recently received renewed interest. We used RAPD markers to  characterize 147 Jerusalem artichoke accessions from nine countries. Thirty  RAPD primers were screened; 13 of them detected 357 reproducible RAPD bands, of  which 337 were polymorphic. Various diversity analyses revealed several  different patterns of RAPD variation. More than 93% of the RAPD variation was  found within accessions of a country. Weak genetic differentiation was observed  between wild and cultivated accessions. Six groups were detected in this  germplasm set. Four ancestral groups were found for the Canadian germplasm. The  most genetically distinct accessions were identified. These findings provide  useful diversity information for understanding the Jerusalem artichoke gene  pool, for conserving Jerusalem artichoke germplasm, and for choosing germplasm  for genetic improvement.
authors.affiliation: Department of Biology, Faculty of Science, Khon Kaen University, Khon Kaen, Thailand. prepua@kku.ac.th
authors.forename: P P
authors.initials: PP
authors.lastname: Wangsomnuk
authors.forename: S
authors.initials: S
authors.lastname: Khampa
authors.forename: P
authors.initials: P
authors.lastname: Wangsomnuk
authors.forename: S
authors.initials: S
authors.lastname: Jogloy
authors.forename: T
authors.initials: T
authors.lastname: Mornkham
authors.forename: B
authors.initials: B
authors.lastname: Ruttawat
authors.forename: A
authors.initials: A
authors.lastname: Patanothai
authors.forename: Y B
authors.initials: YB
authors.lastname: Fu
mesh_terms: D015415:Biomarkers / Q000378:metabolism; D018744:DNA, Plant / Q000737:chemistry; D040342:Genetic Structures; D014644:Genetic Variation; D006368:Helianthus / Q000235:genetics*; D010802:Phylogeny; D019105:Random Amplified Polymorphic DNA Technique
chemical_list: D015415:Biomarkers; D018744:DNA, Plant