Population Genetic Structure and Reproductive Strategy of the Introduced Grass Centotheca lappacea in Tropical Land-Use Systems in Sumatra

Autor: Ladislav Hodač, Fuad Bahrul Ulum, Nicole Opfermann, Natalie Breidenbach, Diego Hojsgaard, Sri Sudarmiyati Tjitrosoedirdjo, Barbara Vornam, Reiner Finkeldey, Elvira Hörandl
Rok vydání: 2015
Předmět:
Conservation of Natural Resources
Polymers
Materials by Structure
Materials Science
lcsh:Medicine
Population genetics
Invasive species
Rubber
Genetic loci
Amplified fragment length polymorphism
Oil palm
Plant genetics
Phylogeography
Invasive Species
Artificial Gene Amplification and Extension
Plant Science
Genes
Plant
Poaceae
Research and Analysis Methods
Plant Genetics
Species Colonization
Genetics
Oil Palm
lcsh:Science
Molecular Biology Techniques
Molecular Biology
Tropical Climate
Evolutionary Biology
Population Biology
Geography
Reproduction
lcsh:R
Ecology and Environmental Sciences
Organisms
food and beverages
Genetic Variation
Biology and Life Sciences
Plants
Polymer Chemistry
Chemistry
Macromolecules
Elastomers
Biogeography
Indonesia
Genetic Loci
Amplified Fragment Length Polymorphism
Physical Sciences
Earth Sciences
lcsh:Q
Introduced Species
Population Genetics
Research Article
Zdroj: PLoS ONE
PLoS ONE, Vol 11, Iss 1, p e0147633 (2016)
ISSN: 1932-6203
Popis: Intensive transformation of lowland rainforest into oil palm and rubber monocultures is the most common land-use practice in Sumatra (Indonesia), accompanied by invasion of weeds. In the Jambi province, Centotheca lappacea is one of the most abundant alien grass species in plantations and in jungle rubber (an extensively used agroforest), but largely missing in natural rainforests. Here, we investigated putative genetic differentiation and signatures for adaptation in the introduced area. We studied reproductive mode and ploidy level as putative factors for invasiveness of the species. We sampled 19 populations in oil palm and rubber monocultures and in jungle rubber in two regions (Bukit Duabelas and Harapan). Amplified fragment length polymorphisms (AFLP) revealed a high diversity of individual genotypes and only a weak differentiation among populations (FST = 0.173) and between the two regions (FST = 0.065). There was no significant genetic differentiation between the three land-use systems. The metapopulation of C. lappacea consists of five genetic partitions with high levels of admixture; all partitions appeared in both regions, but with different proportions. Within the Bukit Duabelas region we observed significant isolation-by-distance. Nine AFLP loci (5.3% of all loci) were under natural diversifying selection. All studied populations of C. lappacea were diploid, outcrossing and self-incompatible, without any hints of apomixis. The estimated residence time of c. 100 years coincides with the onset of rubber and oil palm planting in Sumatra. In the colonization process, the species is already in a phase of establishment, which may be enhanced by efficient selection acting on a highly diverse gene pool. In the land-use systems, seed dispersal might be enhanced by adhesive spikelets. At present, the abundance of established populations in intensively managed land-use systems might provide opportunities for rapid dispersal of C. lappacea across rural landscapes in Sumatra, while the invasion potential in rainforest ecosystems appears to be moderate as long as they remain undisturbed. Open-Access-Publikationsfonds 2016 peerReviewed
Databáze: OpenAIRE
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