Natural Hybrids and Gene Flow between Upland and Lowland Switchgrass

Zhang, Yunwei; Zalapa, Juan; Jakubowski, Andrew R.; Price, David L.; Acharya, Ananta; Wei, Yanling; Brummer, E. Charles; Kaeppler, Shawn M.; Casler, Michael D.

doi:10.2135/cropsci2011.02.0104

Cited by 77Genetic diversity and population structureBioenergy crop production and managementGenetic Mapping and Diversity in Plants and Animals

Natural Hybrids and Gene Flow between Upland and Lowland Switchgrass

Zhang, Yunwei, Zalapa, Juan, Jakubowski, Andrew R., Price, David L., Acharya, Ananta, Wei, Yanling, Brummer, E. Charles, Kaeppler, Shawn M. +1 more·2011·Crop Science

DOI 10.2135/cropsci2011.02.0104

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Abstract

Switchgrass (Panicum virgatum L.) is a perennial grass native to the North American tallgrass prairie and savanna habitats and is broadly adapted to the central and eastern United States. Upland and lowland ecotypes represent the two major taxa within switchgrass, which have distinct but overlapping distributions. The purpose of this study was to survey a broad array of putative upland and lowland accessions for the possible presence of natural hybrids or hybrid derivatives and evidence of historic gene flow between the two ecotypes. All plants were classified as upland, lowland, or intermediate based on visual assessment of phenotype, using large nurseries of known upland or lowland plants as controls. A total of 480 plants were surveyed for 19 simple sequence repeat (SSR) markers and sequenced using five chloroplast DNA (cpDNA) segments. Genetic structure analysis revealed 21 individuals with strong evidence for intertaxa hybrid origin and another 25 individuals with moderate evidence for intertaxa hybrid origin. All but two of these individuals originated from remnant populations of the central or eastern Gulf Coast or along the Atlantic Seaboard, a region that is populated with significant quantities of both upland and lowland ecotypes. We propose the central and eastern Gulf Coast glacial refuge as the primary center of origin and diversity for switchgrass, with the western Gulf Coast as the secondary center of origin and diversity. Much of this diversity appears to have been preserved along one of the major northward postglacial migration routes, the Atlantic Seaboard.

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Switchgrass cultivars are classified into lowland and upland phenotypic groups, with both groups growing well throughout the switchgrass adaptation zone.
“Cultivars are classified into lowland and upland phenotypic groups, with both groups growing well throughout the switchgrass adaptation zone [33].”
From Switchgrass Biofuel Production on Reclaimed Surface Mines: I. Soil Quality and Dry Matter Yield (2016) · cites this paper as [33]

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RESEARCH ARTICLE Switchgrass (Panicum virgatum L.) Genotypes Differ between Coastal Sites and Inland Road Corridors in the Northeastern US
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Authors: Zhang, Y., Zalapa, J., Jakubowski, A. R., Price, D. L., Acharya, A., Wei, Y., Brummer, E. C., Kaeppler, S. M., & Casler, M. D.
Affiliations: China Agricultural University (CN)
University of Wisconsin System (US)
University of Georgia (US)
Agricultural Research Service (US)
Corresponding author: Casler, Michael D.
ORCID: Zhang, Yunwei
Zalapa, Juan
Brummer, E. Charles
Kaeppler, Shawn M.
Casler, Michael D.
Venue: Crop Science
Publisher: Wiley
Published: 2011-11
Volume: 51
Issue: 6
Pages: 2626-2641
ISSN: 0011-183X (ISSN-L)
1435-0653
DOI: 10.2135/cropsci2011.02.0104
OpenAlex: W2169237058
Cited by: 77
References: 73
Citations by year: 2026: 2 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 3 · 2021: 4 · 2020: 9 · 2019: 4 · 2018: 4 · 2017: 4 · 2016: 6 · 2015: 7 · 2014: 13 · 2013: 7 · 2012: 4
FWCI: 5.39
Type: journal article
Language: en
Open access: closed
Licence: onlinelibrary.wiley.com/termsAndConditions#vor (vor)
Locations: Crop Science (publishedVersion)
Funders: Agricultural Research Service (3655‐41000‐003‐00D, 3655‐41000‐004‐00D)
University of Wisconsin-Madison
University of Georgia
Ministry of Science and Technology of the People's Republic of China (2008BADB3B04, 2009BADA7B04, 2011AA100209)
Topics: Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic diversity and population structure
Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords: switchgrass, natural hybrids, gene flow, interspecific hybridization, microsatellite markers, chloroplast DNA, genetic structure, center of origin, glacial refugia, postglacial migration, Gulf Coast, Atlantic seaboard, remnant populations, plant genetic diversity

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Natural Hybrids and Gene Flow between Upland and Lowland Switchgrass

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