| Abstract Detail
Genomics / Proteomics Aldrich, Preston [1], Ahmed, Asad [2], Ayub, Nazia [2], Briguglio, Joseph [2], Kapadia, Shyam [2], Morker, Minesh [2], Ondracek, Caitlin [2], Rawal, Ankit [2], Salam, Abrar [2], Huebner, Cynthia [3], Greer, Gary [4]. Genome scans of adaptive diversity in U.S. populations of the invasive tree Ailanthus altissima. Ailanthus altissima (Tree-of-Heaven or stinking ash) is an urban weed tree that has reached most states in the continental US, with especially troublesome infestations in the eastern states. It has a toxic chemistry that seems to limit herbivory and contribute to allelopathic interactions with native plants. We are studying collections from 35 cities in the US, predominantly from eastern and central states (10-25 samples per city). We are conducting genome scans of putative adaptive variation using universal primers for the cytochrome P450 (cytP450) superfamily of genes (200+ genes). For comparison we also are surveying neutral molecular genetic variation using 7 microsatellite markers. The cytP450 genes play a central role in the allelochemical (naturally-produced toxins and repellants) arms race involving plants and their herbivores. Plants use these genes to produce toxins, and animals use them to detoxify the plant toxins. Preliminary analysis suggests microsatellite differentiation to either side of the Appalachians, whereas the genome scan of cytP450 variation indicates altitudinal differentiation. We also compare cytP450 diversity in Ailanthus with levels detected in other tree species including temperate oaks (Quercus) and the tropical tree Symphonia globulifera.
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1 - Benedictine University, Department of Biological Sciences, 5700 College Road, Lisle, Illinois, 60532-0900, USA
2 - Benedictine University, Department of Biological Sciences
3 - NE Research Station, USDA Forest Service, 180 Canfield St., Morgantown, West Virginia, 26505, USA
4 - Grand Valley State University, Biology Department, 1 Campus Drive, Allendale, Michigan, 49401, USA
Keywords:
invasive plant
Genetic diversity
genome profiling
cytochrome P450.
Presentation Type: Poster:Posters for Topics
Session: P
Location: Exhibit Hall (Northeast, Southwest & Southeast)/Hilton
Date: Sunday, July 8th, 2007
Time: 8:00 AM
Number: P72001
Abstract ID:2138 |
