Novel sources of variation in grain Zinc (Zn) concentration in bread wheat germplasm derived from Watkins landraces

A - Papers appearing in refereed journals

Khokhar, J. S., King, J., King, I. P., Young, S. D., Foulkes, M. J., De Silva, J., Weerasinghe, M., Mossa, A., Griffiths, S., Riche, A. B., Hawkesford, M. J., Shewry, P. R. and Broadley, M. R. 2020. Novel sources of variation in grain Zinc (Zn) concentration in bread wheat germplasm derived from Watkins landraces. PLOS ONE. 15 (2), p. e0229107. https://doi.org/10.1371/journal.pone.0229107

AuthorsKhokhar, J. S., King, J., King, I. P., Young, S. D., Foulkes, M. J., De Silva, J., Weerasinghe, M., Mossa, A., Griffiths, S., Riche, A. B., Hawkesford, M. J., Shewry, P. R. and Broadley, M. R.
Abstract

A diverse panel of 245 wheat genotypes, derived from crosses between landraces from the Watkins collection representing global diversity in the early 20th century and the modern wheat cultivar Paragon, was grown at two field sites in the UK in 2015–16 and the concentrations of zinc and iron determined in wholegrain using inductively coupled plasma-mass spectrometry (ICP-MS). Zinc concentrations in wholegrain varied from 24–49 mg kg-1 and were correlated with iron concentration (r = 0.64) and grain protein content (r = 0.14). However, the correlation with yield was low (r = -0.16) indicating little yield dilution. A sub-set of 24 wheat lines were selected from 245 wheat genotypes and characterised for Zn and Fe concentrations in wholegrain and white flour over two sites and years. White flours from 24 selected lines contained 8–15 mg kg-1 of zinc, which was positively correlated with the wholegrain Zn concentration (r = 0.79, averaged across sites and years). This demonstrates the potential to exploit the diversity in landraces to increase the concentration of Zn in wholegrain and flour of modern high yielding bread wheat cultivars.

Year of Publication2020
JournalPLOS ONE
Journal citation15 (2), p. e0229107
Digital Object Identifier (DOI)https://doi.org/10.1371/journal.pone.0229107
Open accessPublished as bronze (free) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDesigning Future Wheat
Indo-UK Centre for the improvement of Nitrogen use Efficiency in Wheat (INEW)
Publisher's version
Output statusPublished
Publication dates
Online28 Feb 2020
Publication process dates
Accepted29 Jan 2020
PublisherPublic Library of Science (PLOS)
ISSN1932-6203

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