Selection for Biomass Yield in Upland, Lowland, and Hybrid Switchgrass
Abstract
Switchgrass (Panicum virgatum L.) is a candidate for cellulosic bioenergy feedstock development in many parts of North America, Europe, and Asia. Breeding for increased biomass yield is a viable and desirable research objective to improve both economic and energy yields per hectare. The objectives of this study were to estimate progress from (i) selection for biomass yield in upland switchgrass, (ii) selection for winter survival, biomass yield, and biomass quality in lowland switchgrass, and (iii) advanced‐generation heterosis effects in four upland × lowland hybrid switchgrass populations. Selection for increased biomass yield in upland switchgrass resulted in mean genetic gains for of 0.71 Mg ha−1 per cycle (8% per cycle = 4% yr−1) for biomass yield. Selection for increased biomass yield in lowland switchgrass resulted in mean genetic gains of 0.89 Mg ha−1 (18% = 1% yr−1) for biomass yield. Mean high‐parent heterosis between upland and lowland ecotypes was 3.57 Mg ha−1 (43%). These gains in biomass yield resulted in significant increases in ethanol production for a fermentation platform or high heating value for a combustion platform. Biomass yield is a moderately heritable trait in switchgrass and it can be readily improved in both upland and lowland populations using conventional breeding methods.
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The productivity advantage of lowland switchgrass ecotypes decreases with increasing latitude.
“but this advantage decreases with increasing latitude [4].”
From Switchgrass Biofuel Production on Reclaimed Surface Mines: I. Soil Quality and Dry Matter Yield (2016) · cites this paper as [4]
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- Authors
- Casler, M. D., & Vogel, K. P.
- Affiliations
- U.S. Dairy Forage Research Center (US)
- University of Nebraska–Lincoln (US)
- Corresponding author
- Casler, Michael D.
- ORCID
- Casler, Michael D.
- Venue
- Crop Science
- Publisher
- Wiley
- Published
- 2014-03
- Volume
- 54
- Issue
- 2
- Pages
- 626-636
- ISSN
- 0011-183X (ISSN-L)
- 1435-0653
- OpenAlex
- W1988301449
- Cited by
- 79
- References
- 40
- Citations by year
- 2026: 1 · 2025: 4 · 2024: 2 · 2023: 5 · 2022: 6 · 2021: 4 · 2020: 8 · 2019: 5 · 2018: 8 · 2017: 8 · 2016: 10 · 2015: 10 · 2014: 8
- FWCI
- 23.91
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Crop Science (publishedVersion)
- Lincoln (University of Nebraska) (submittedVersion)
- Funders
- Agricultural Research Service
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
- Life Sciences › Agricultural and Biological Sciences › Plant Science › Genetics and Plant Breeding
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Agricultural Productivity and Crop Improvement
- Keywords
- switchgrass, biomass yield, heterosis, winter survival, biomass quality, genetic gain, ethanol production, higher heating value, heritability, breeding
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