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dc.contributor.authorCyriac, Daliyaen
dc.contributor.authorHofmann, Raineren
dc.contributor.authorStewart, Alanen
dc.contributor.authorSathish, P.en
dc.contributor.authorWinefield, Christopher S.en
dc.contributor.authorMoot, Derrick J.en
dc.identifier.citationCyriac et al. (2018). Intraspecific differences in long-term drought tolerance in perennial ryegrass. PLoS ONE, 13(4), e0194977. doi:10.1371/journal.pone.0194977en
dc.description.abstractLolium perenne L. (perennial ryegrass) is the most important pasture grass species in temperate regions of the world. However, its growth is restricted in summer dry environments. Germplasm screening can be used to identify accessions or individual plants for incorporation into breeding programs for drought tolerance. We selected nine perennial ryegrass accessions from different global origins and from a range of climatic and environmental conditions. In addition, the perennial ryegrass cultivar 'Grasslands Impact' was chosen as a reference. The accessions were grown for 360 days in a controlled environment through six consecutive drought stress and recovery cycles. We observed intraspecific differences in drought stress responsiveness for shoot biomass and survival from the third stress cycle. An accession from Norway had 50% more shoot dry matter than the next best-performing accession after six drought cycles. Compared with the reference cultivar 'Grasslands Impact', shoot dry matter of the accession from Norway was more than seven times higher after six drought cycles, indicating superior performance of this ecotype under drought stress. Drought tolerance was characterized by osmotic adjustment and higher relative leaf water content at low soil moisture levels. Furthermore, the findings of this study identify solute potential as an early predictor of drought stress tolerance. These intraspecific differences can be used in breeding programs for the development of drought-tolerant perennial ryegrass cultivars.en
dc.publisherPublic Library of Scienceen
dc.relationThe original publication is available from - Public Library of Science -
dc.rights© 2018 Cyriac et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en
dc.subjectperennial ryegrassen
dc.subjectdrought toleranceen
dc.subjectgenetic modificationen
dc.subjectGeneral Science & Technologyen
dc.subject.meshPlant Leavesen
dc.subject.meshPlant Shootsen
dc.subject.meshSpecies Specificityen
dc.titleIntraspecific differences in long-term drought tolerance in perennial ryegrassen
dc.typeJournal Article
lu.contributor.unitLincoln Universityen
lu.contributor.unitFaculty of Agriculture and Life Sciencesen
lu.contributor.unitDepartment of Agricultural Sciencesen
lu.contributor.unitDepartment of Wine, Food and Molecular Biosciencesen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.subject.anzsrc070305 Crop and Pasture Improvement (Selection and Breeding)en
dc.subject.anzsrc100105 Genetically Modified Field Crops and Pastureen
dc.relation.isPartOfPLoS ONEen
pubs.notesArticle number e0194977en
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/AGSC
pubs.organisational-group/LU/Agriculture and Life Sciences/WFMB
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/PE20
pubs.organisational-group/LU/Research Management Office/QE18

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