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Abstract Detail



Ecological Section

Li, Junmin [1], Du, Leshan [2], Zuo, Wei [3].

Adaptive genetic differentiation and phenotypic plasticity mediated phenotypic differentiation among populations of invasive Solidago canadensis in China.

Plant invasion often involve rapid evolutionary change. Adaptive genetic differentiation and phenotypic plasticity play import roles in the rapid evolutionary change of plants to the local environments. Solidago canadensis is a long-lived rhizomatous perennial of North American origin that belongs to the most widespread invasive alien pants. After escaped into the wild, Solidago canadensis spreads rapidly from the southeastern China to the West and North. In this study, we examined the relative importance of genetic differentiation and phenotypic plasticity in determining the phenotypic differentiation among 15 Solidago canadensis populations along the dispersal distribution in China. Using the grid’s GIS database, the extracted climate and soil properties of 15 Solidago canadensis populations displayed high dispersal-scale heterogeneity. Most of the phenotypic variation in the field existed among populations of Solidago canadensis in China, and phenotypic traits significantly correlated with the synthesized environmental heterogeneity. High genetic differentiation among populations of Solidago canadensis was revealed using microsatellite markers. No difference of chromosome ploidy was found among different populations and all the individuals were determined as hexapolyploidy by flow cytometry. Most of the phenotypic variation in the common garden experiment also existed among populations, but no significant correlation was found between the phenotypic traits and the synthesized environmental heterogeneity. Multiple linear regression analyses revealed significant selection on the phenotypic traits of populations spread into the Western and those of populations spread into the Northern and Southern. These results indicated that both genetic differentiation and phenotypic plasticity could affect the phenotypic change of Solidago canadensis in response to the dispersal-scale environmental heterogeneity.


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1 - Taizhou University , Insitute Of Ecology, 1139 Shifu Road, Jiaojiang, Taizhou, N/A, 318000, China
2 - Beijing Forest University, No. 35 Qinghuadong Road, Haidian District, Beijing
3 - Taizhou University, 1139 Shifu Road, Taizhou

Keywords:
Invasive plant
Genetic differentiation
Phenotypic plasticity
Evolution
Geographical variation.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Eyrie/Boise Centre
Date: Monday, July 28th, 2014
Time: 5:30 PM
Number: PEC021
Abstract ID:318
Candidate for Awards:None


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