Abstract
AbstractPolyploidy may contribute to invasive ability as it can lead to high survival and fitness during establishment and enhance the processes of adaptation to novel environments by increasing genetic diversity in invading propagules. Many grasses are polyploid and many are aggressive invaders, making them persistent problems in disturbed environments worldwide. Today, vast areas of central Panama are dominated by Saccharum spontaneum, a perennial grass that originates from Asia. While widely regarded as invasive, it is not known when or how it arrived in Panama. We explore hypotheses regarding the timing and origins of this invasion through literature review and comparisons of genetic diversity in Panama with accessions from available sugarcane germplasm collections, highlighting historical accessions that were likely brought to Panama in 1939 as part of a USDA sugarcane germplasm collection. Samples were haplotyped at two chloroplast loci and genotyped using eight microsatellite markers. All sequenced individuals from Panama belong to a single chloroplast lineage which is common worldwide and was common in the Historic germplasm collection. Although genotypic diversity was extremely high in all samples due to high ploidy, samples from Panama had reduced diversity and clustered with several accessions in the Historic collection which had the same haplotype and high ploidy levels. Our results suggest that accidental escape from the historical sugarcane germplasm collection is the likely origin of the S. spontaneum invasion in Panama. Intraspecific hybridization among several historical accessions and pre-adaptation to local conditions may have facilitated its rapid spread and persistence. We discuss the implications of our findings for biosecurity of germplasm collections.
Publisher
Springer Science and Business Media LLC
Subject
Ecology,Ecology, Evolution, Behavior and Systematics
Reference80 articles.
1. Ahmad R, Liow P-S, Spencer DF, Jasieniuk M (2008) Molecular evidence for a single genetic clone of invasive Arundo donax in the United States. Aquat Bot 88:113–120
2. Aitken KS, Jackson PA, McIntyre CL (2005) A combination of AFLP and SSR markers provides extensive map coverage and identification of homo(eo)logous linkage groups in a sugarcane cultivar. Theor Appl Gen 110:789–801
3. Aitken KS, Li J, Piperidis G, Qing C, Yuanhong F, Jackson P (2018) Worldwide genetic diversity of the wild species and level of diversity captured within sugarcane breeding programs. Crop Sci 58:218
4. ANAM-ACP (2006) Report: Monitoreo de la Cuenca Hidrográfica del Canal de Panamá. Panama
5. Artschwager E (1942) A comparative analysis of the vegetative characteristics of some variants of Saccharum spontaneum. USDA Tech Bull No. 811. Washington, DC: United States Department of Agriculture
Cited by
8 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献