Abstract Detail


Tippery, Nicholas [1], Benoit, Lori [2], Les, Donald [2], Bugbee, Gregory [3], Stebbins, Summer [3].

Global genetic diversity in hydrilla (Hydrilla verticillata) and evidence for a novel invasive strain in North America.

Hydrilla is one of the most notorious aquatic weeds in North America, where two widespread and ecologically different biotypes have largely separate ranges. Using novel molecular data from the nuclear internal transcribed spacer (ITS) region and phytoene desaturase (PDS) gene, we corroborated prior evidence that the monoecious and dioecious biotypes are genetically distinct and originated from different portions of the hydrilla native range. Nuclear data also provided evidence for hybridization in the native range among populations that otherwise have distinct plastid haplotypes. Both biotypes underwent hybridization before being introduced to North America. Additionally, molecular evidence identified a third biotype, recently introduced to New England from the northern portion of the native range. Our molecular characterization of hydrilla populations confirms the existence of three hydrilla biotypes in North America, each of which may present unique ecological challenges and require distinct management approaches.

1 - University of Wisconsin-Whitewater, Department of Biological Sciences, 800 W Main St, Whitewater, WI, 53190, USA
2 - University of Connecticut, Department of Ecology and Evolutionary Biology, 75 N Eagleville Rd, Storrs, CT, 06269, USA
3 - Connecticut Agricultural Experiment Station, Department of Environmental Sciences, 123 Huntington St, New Haven, CT, 06511, USA

Invasive species
Aquatic plants.

Presentation Type: Poster
Session: P, Systematics Posters
Location: Virtual/Virtual
Date: Thursday, July 30th, 2020
Time: 5:00 PM Time and date to be determined
Number: PSY003
Abstract ID:178
Candidate for Awards:None

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