μCT trait analysis reveals morphometric differences between domesticated temperate small grain cereals and their wild relatives

Aoife Hughes, Hugo Oliveira, Nick Fradgley, Fiona Corke, James Cockram, John Doonan, Candida Nobre Nibau

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

18 Dyfyniadau(SciVal)
202 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Wheat and barley are two of the founder crops domesticated in the Fertile Crescent, and currently represent crops of major economic importance in temperate regions. Due to impacts on yield, quality and end-use, grain morphometric traits remain an important goal for modern breeding programmes and are believed to have been selected for by human populations. To directly and accurately assess the three-dimensional (3D) characteristics of grains, we combine X-ray microcomputed tomography (μCT) imaging techniques with bespoke image analysis tools and mathematical modelling to investigate how grain size and shape vary across wild and domesticated wheat and barley. We find that grain depth and, to a lesser extent, width are major drivers of shape change and that these traits are still relatively plastic in modern bread wheat varieties. Significant changes in grain depth are also observed to be associated with differences in ploidy. Finally, we present a model that can accurately predict the wild or domesticated status of a grain from a given taxa based on the relationship between three morphometric parameters (length, width and depth) and suggest its general applicability to both archaeological identification studies and breeding programmes.

Iaith wreiddiolSaesneg
Tudalennau (o-i)98-111
Nifer y tudalennau14
CyfnodolynPlant Journal
Cyfrol99
Rhif cyhoeddi1
Dyddiad ar-lein cynnar10 Ebr 2019
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Gorff 2019

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