Overcoming the trade-off between grain weight and number in wheat by the ectopic expression of expansin in developing seeds leads to increased yield potential

dc.creatorCalderini, D.F.
dc.creatorCastillo, F.M.
dc.creatorArena, A.
dc.creatorMolero, G.
dc.creatorReynolds, M.P.
dc.creatorCraze, M.
dc.creatorBowden, S.
dc.creatorMilner, M.J.
dc.creatorWallington, E.J.
dc.creatorDowle, A.
dc.creatorGomez, L.D.
dc.creatorMcQueen-Mason, S.J.
dc.date2020-12-19T01:20:13Z
dc.date2020-12-19T01:20:13Z
dc.date2021
dc.date.accessioned2023-07-17T20:06:30Z
dc.date.available2023-07-17T20:06:30Z
dc.identifierhttps://hdl.handle.net/10883/21081
dc.identifier10.1111/nph.17048
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7512867
dc.descriptionWheat is the most widely grown crop globally, providing 20% of all human calories and protein. Achieving step changes in genetic yield potential is crucial to ensure food security, but efforts are thwarted by an apparent trade-off between grain size and number. Expansins are proteins that play important roles in plant growth by enhancing stress relaxation in the cell wall, which constrains cell expansion. Here, we describe how targeted overexpression of an α-expansin in early developing wheat seeds leads to a significant increase in grain size without a negative effect on grain number, resulting in a yield boost under field conditions. The best-performing transgenic line yielded 12.3% higher average grain weight than the control, and this translated to an increase in grain yield of 11.3% in field experiments using an agronomically appropriate plant density. This targeted transgenic approach provides an opportunity to overcome a common bottleneck to yield improvement across many crops.
dc.description629-640
dc.languageEnglish
dc.publisherWiley
dc.relationhttps://nph.onlinelibrary.wiley.com/doi/10.1111/nph.17048#support-information-section
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dc.rightsOpen Access
dc.source2
dc.source230
dc.source0028-646X
dc.sourceNew Phytologist
dc.subjectAGRICULTURAL SCIENCES AND BIOTECHNOLOGY
dc.subjectExpansin Protein
dc.subjectGrain Number
dc.subjectGrain Weight
dc.subjectTrade-Offs
dc.subjectPROTEINS
dc.subjectGRAIN
dc.subjectGRASSES
dc.subjectPERICARP
dc.subjectTRANSGENICS
dc.titleOvercoming the trade-off between grain weight and number in wheat by the ectopic expression of expansin in developing seeds leads to increased yield potential
dc.typeArticle
dc.typePublished Version
dc.coverageUnited Kingdom


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