NDLI: Hybridization between Schoenoplectus sedges across Chesapeake Bay marshes

Content Provider	Springer Nature Link
Author	Blum, Michael J. Knapke, Erin McLachlan, Jason S. Snider, Sunny B. Saunders, Colin J.
Copyright Year	2010
Abstract	Hybridization is an evolutionary mechanism capable of enhancing adaptive potential, especially among species in fragmented or disturbed ecosystems like coastal marshes. In this study, we evaluated whether hybridization might influence adaptive responses in coastal marshes that are susceptible to the effects of global environmental change. To do so, we examined the extent and nature of hybridization between Schoenoplectus americanus and S. pungens, two ecologically dominant sedges in low-lying marshes across Chesapeake Bay (USA). Observed patterns of variation at genetically based morphological traits, cpDNA and nuclear microsatellite markers confirm that introgressive hybridization occurs between the two species. Comparisons of microsatellite and cpDNA profiles found that hybridization is reciprocal, although a disproportionate number of hybrids exhibit genomic asymmetries favoring S. americanus. AIC model selection consistently identified latitude as the strongest explanatory variable for the distribution of parental species, although discriminant analysis indicated that distributions also correspond to variation in environmental conditions. Discriminant analysis further indicated that ecological correlates of hybrid and S. americanus genotypes are similar, but not uniformly so. These findings indicate that the boundary between S. americanus and S. pungens is porous, and that hybridization could influence responses of one or both species to changing environmental regimes.
Starting Page	1885
Ending Page	1898
Page Count	14
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	11
Issue Number	5
e-ISSN	15729737
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-04-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Introgressive hybridization Global environmental change Coastal marsh Adaptive evolution Plant Sciences Evolutionary Biology Conservation Biology/Ecology Animal Anatomy / Morphology / Histology
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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