caa a22 4500 445845163 CHVBK 20180317145356.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10709-011-9597-6 doi (NATIONALLICENCE)springer-10.1007/s10709-011-9597-6 Post-glacial evolution of Panicum virgatum [Elektronische Daten] centers of diversity and gene pools revealed by SSR markers and cpDNA sequences [Yunwei Zhang, Juan Zalapa, Andrew Jakubowski, David Price, Ananta Acharya, Yanling Wei, E. Brummer, Shawn Kaeppler, Michael Casler] Switchgrass (Panicum virgatum), a central and Eastern USA native, is highly valued as a component in tallgrass prairie and savanna restoration and conservation projects and a potential bioenergy feedstock. The purpose of this study was to identify regional diversity, gene pools, and centers-of-diversity of switchgrass to gain an understanding of its post-glacial evolution and to identify both the geographic range and potential overlap between functional gene pools. We sampled a total of 384 genotypes from 49 accessions that included the three main taxonomic groups of switchgrass (lowland 4x, upland 4x, and upland 8x) along with one accession possessing an intermediate phenotype. We identified primary centers of diversity for switchgrass in the eastern and western Gulf Coast regions. Migration, drift, and selection have led to adaptive radiation in switchgrass, creating regional gene pools within each of the main taxa. We estimate that both upland-lowland divergence and 4x-to-8x polyploidization within switchgrass began approximately 1.5-1Mybp and that subsequent ice age cycles have resulted in gene flow between ecotype lineages and between ploidy levels. Gene flow has resulted in "hot spots” of genetic diversity in the southeastern USA and along the Atlantic Seaboard. Springer Science+Business Media B.V. (outside the USA), 2011 Switchgrass nationallicence DNA markers nationallicence Genetic diversity nationallicence Genetic structure nationallicence Post-glacial migration nationallicence Zhang Yunwei Grassland Institute, China Agricultural University, Beijing, China aut Zalapa Juan Department of Horticulture, USDA-ARS, Vegetable Crops Research Unit, University of Wisconsin, 1575 Linden Dr., 53706, Madison, WI, USA aut Jakubowski Andrew Department of Agronomy, University of Wisconsin, Madison, WI, USA aut Price David Department of Agronomy, University of Wisconsin, Madison, WI, USA aut Acharya Ananta Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut Wei Yanling Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut Brummer E. Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut Kaeppler Shawn Department of Agronomy, University of Wisconsin, Madison, WI, USA aut Casler Michael USDA-ARS, U.S. Dairy Forage Research Center, Madison, WI, USA aut Genetica Springer Netherlands 139/7(2011-07-01), 933-948 0016-6707 139:7<933 2011 139 10709 https://doi.org/10.1007/s10709-011-9597-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10709-011-9597-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Yunwei Grassland Institute, China Agricultural University, Beijing, China aut NATIONALLICENCE 700 1- Zalapa Juan Department of Horticulture, USDA-ARS, Vegetable Crops Research Unit, University of Wisconsin, 1575 Linden Dr., 53706, Madison, WI, USA aut NATIONALLICENCE 700 1- Jakubowski Andrew Department of Agronomy, University of Wisconsin, Madison, WI, USA aut NATIONALLICENCE 700 1- Price David Department of Agronomy, University of Wisconsin, Madison, WI, USA aut NATIONALLICENCE 700 1- Acharya Ananta Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut NATIONALLICENCE 700 1- Wei Yanling Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut NATIONALLICENCE 700 1- Brummer E. Crop and Soil Science Department, Institute for Plant Breeding, Genetics, and Genomics, University of Georgia, Athens, GA, USA aut NATIONALLICENCE 700 1- Kaeppler Shawn Department of Agronomy, University of Wisconsin, Madison, WI, USA aut NATIONALLICENCE 700 1- Casler Michael USDA-ARS, U.S. Dairy Forage Research Center, Madison, WI, USA aut NATIONALLICENCE 773 0- Genetica Springer Netherlands 139/7(2011-07-01), 933-948 0016-6707 139:7<933 2011 139 10709 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer