Increasing yield, both intrinsic yield and closing of the yield gap, must be achieved with increased efficiency and sustainability with regard to fertiliser and water input. Increased yield and efficiency in both higher and lower yielding environments, in present and future climates, requires genetic improvements in yield traits per se, as well as in tolerance to abiotic and biotic stresses.
Work Package 1 addresses two topics with shared objectives across the wheat and other John Innes Centre, Rothamsted Research, Earlham Institute and Quadram Institute programmes.
Both require intensive high throughput field phenotyping, aided by the newly established unique Rothamsted Research and John Innes Centre facilities for in-field automated phenotyping, focussed on wheat research and employed to evaluate germplasm, including donor germplasm, segregating and TILLING populations. Work Package 1 also includes further development of specific automated high throughput field phenotyping methodologies for monitoring wheat performance, the genetic dissection of key traits and the development of improved germplasm.
Accessions of the AE Watkins landrace collection were collected from markets from 32 countries across the world. From the over 800 lines of this collection a core set of 119 accessions has been selected, which captures the majority of the genetic diversity (Wingen et al, TAG, 2014).
Information on accession names, country of origin, growth habit and ancestral group can be downloaded here:
The bread wheat landrace NAM (nested association mapping) panel was developed as a set of bi-parental segregating F4 single-seed populations from crosses of spring wheat accession ‘Paragon’ with diverse wheat germplasm, particularly from the AE Watkins core set. Population development was conducted within the WGIN and the WISP project. As of January 2016 there were 127 Watkins populations and many Gediflux populations under development.
Populations were genotyped, mostly employing KASPar SNP markers, and genetic maps were developed (Wingen et al. Genetics 2017). In total, 90 bi-parental population maps are currently available:
- KASP genetic maps of 87 populations from the Bread Wheat Landrace NAM Panel
- Axiom/iSelect genetic maps of 3 populations from the Bread Wheat Landrace NAM Panel
Near Isogenic Lines (NILs), developed from ParagonXWatkins populations in Paragon background, were genotyped with the 35k bread wheat axiom chip and the markers arranged along the whole genome assembly. The graphical genotypes can be inspected on the following webpages:
Phenotypic data from JIC Church Farm field trials is available as spread sheets for different resources:
A changing set of NAM populations is grown every year in field trials at at JIC:
- 2011 JIC trait data from 7 of the landrace NAM populations
- 2012 JIC trait data from 2 of the landrace NAM populations
- 2013 JIC trait data from 6 of the landrace NAM populations
- 2014 JIC trait data from 26 of the landrace NAM populations
- 2015 JIC trait data from 17 of the landrace NAM populations
- 2016 JIC trait data from 6 of the landrace NAM populations
- 2017 JIC trait data from 9 of the landrace NAM populations
This resource has a dedicated page here
The non-restrictive Material Transfer Agreement needed to use our resources is available here: MTA template