Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080
Forage plants underpin the livestock industry. Selective breeding, including polyploidization, where genome size is increased by whole genome duplication, changes the productivity and stress tolerance of new varieties. We conducted a growth chamber experiment to investigate the likely responses of &...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Agronomy |
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| Online Access: | https://www.mdpi.com/2073-4395/9/3/159 |
| _version_ | 1818571980988743680 |
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| author | Mark A. Lee Victoria Howard-Andrews Michael Chester |
| author_facet | Mark A. Lee Victoria Howard-Andrews Michael Chester |
| author_sort | Mark A. Lee |
| collection | DOAJ |
| description | Forage plants underpin the livestock industry. Selective breeding, including polyploidization, where genome size is increased by whole genome duplication, changes the productivity and stress tolerance of new varieties. We conducted a growth chamber experiment to investigate the likely responses of <i>Lolium perenne</i> L. to drought, testing four diploid and four tetraploid varieties. We simulated projected spring and summer temperatures for the South-West of England in 2080, applying three projected rainfall scenarios, which varied in drought severity. Drought caused a reduction in productivity, but there was substantial variation between varieties (up to 82%), with the optimal variety changing depending on drought severity. Across three harvests, productivity declined by 43% and 27% (dry biomass) for the severe and likely drought scenarios, respectively. In the final harvest, tetraploids exhibited a greater biomass under severe drought, whereas diploids had a greater biomass under the current rainfall and likely drought scenarios. Longer stomata were observed in tetraploids; however, stomatal conductance was not significantly different between ploidy levels. Trait selection will be important for future drought adaptation. Local climate projections will need to be consulted when selecting <i>L. perenne</i> varieties to tolerate the spatially variable reductions in future rainfall. |
| first_indexed | 2024-12-14T18:51:22Z |
| format | Article |
| id | doaj.art-ed67cbdfb0274e9c9e27a7c84f2e6a31 |
| institution | Directory Open Access Journal |
| issn | 2073-4395 |
| language | English |
| last_indexed | 2024-12-14T18:51:22Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Agronomy |
| spelling | doaj.art-ed67cbdfb0274e9c9e27a7c84f2e6a312022-12-21T22:51:14ZengMDPI AGAgronomy2073-43952019-03-019315910.3390/agronomy9030159agronomy9030159Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080Mark A. Lee0Victoria Howard-Andrews1Michael Chester2Natural Capital and Plant Health, Royal Botanic Gardens Kew, Richmond TW9 3DS, UKSchool of Biological Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, UKNatural Capital and Plant Health, Royal Botanic Gardens Kew, Richmond TW9 3DS, UKForage plants underpin the livestock industry. Selective breeding, including polyploidization, where genome size is increased by whole genome duplication, changes the productivity and stress tolerance of new varieties. We conducted a growth chamber experiment to investigate the likely responses of <i>Lolium perenne</i> L. to drought, testing four diploid and four tetraploid varieties. We simulated projected spring and summer temperatures for the South-West of England in 2080, applying three projected rainfall scenarios, which varied in drought severity. Drought caused a reduction in productivity, but there was substantial variation between varieties (up to 82%), with the optimal variety changing depending on drought severity. Across three harvests, productivity declined by 43% and 27% (dry biomass) for the severe and likely drought scenarios, respectively. In the final harvest, tetraploids exhibited a greater biomass under severe drought, whereas diploids had a greater biomass under the current rainfall and likely drought scenarios. Longer stomata were observed in tetraploids; however, stomatal conductance was not significantly different between ploidy levels. Trait selection will be important for future drought adaptation. Local climate projections will need to be consulted when selecting <i>L. perenne</i> varieties to tolerate the spatially variable reductions in future rainfall.https://www.mdpi.com/2073-4395/9/3/159biomassdrought toleranceforagenutritionpolyploidyproductivitytraits |
| spellingShingle | Mark A. Lee Victoria Howard-Andrews Michael Chester Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 Agronomy biomass drought tolerance forage nutrition polyploidy productivity traits |
| title | Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 |
| title_full | Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 |
| title_fullStr | Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 |
| title_full_unstemmed | Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 |
| title_short | Resistance of Multiple Diploid and Tetraploid Perennial Ryegrass (<i>Lolium perenne</i> L.) Varieties to Three Projected Drought Scenarios for the UK in 2080 |
| title_sort | resistance of multiple diploid and tetraploid perennial ryegrass i lolium perenne i l varieties to three projected drought scenarios for the uk in 2080 |
| topic | biomass drought tolerance forage nutrition polyploidy productivity traits |
| url | https://www.mdpi.com/2073-4395/9/3/159 |
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