Ghosh, Rajlakshmi , Rocha, Oscar J. .
Preliminary assessment of genetic diversity and population differentiation in Multiflora Rose (Rosa multiflora Thunb. ex. Murr.), an invasive plant in Ohio.
Genetic variation and population differentiation has often been a useful tool in identifying evolutionary forces that might interact in colonizing species. In this study we examined genetic variation and levels of differentiation in wild populations of Multiflora Rose, (Rosa multiflora Thunb. Ex. Murr.), an invasive plant in Ohio. Genetic variability and population differentiation were studied using six microsatellite markers developed for cut rose (Rosa hybrida). Levels of polymorphism, population differentiation and Neiís unbiased genetic distances were investigated. Data was analyzed following identification of microsatellite polymorphism in all loci and a summary of F-statistics was obtained. Though significant levels of genetic diversity were reported in all sites, a trend of heterozygosity deficiency was detected in the studied populations. Mean observed heterozygosity (HO=0.3585) was less than mean expected heterozygosity (HE=0.7109). Genetic differentiation between populations found to be high (mean Fst = 0.4738) and genetic distance between populations was not correlated with geographical distance. The role of genetic diversity on the invasiveness of this species is discussed in the light of ecological and evolutionary considerations.
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1 - Kent State University, Department of Biological Science, Room 256, Cunningham Hall, Kent, Ohio, 44242, U.S.A
2 - Kent State University, Department of Biological Sciences, Po Box 5190, Kent, Ohio, 44242-0001, USA
Presentation Type: Oral Paper:Papers for Topics
Location: Williford A/Hilton
Date: Tuesday, July 10th, 2007
Time: 10:45 AM