Broadening the genetic base of crops is crucial for developing varieties to respond to global agricultural challenges such as climate change. Here, we analysed a diverse panel of 371 domesticated lines of the model crop of barley to explore the genetics of crop adaptation. We first collected exome sequence data and phenotypes of key life history traits from contrasting multi-environment common garden trials. Then we applied refined statistical methods, including based on exomic haplotype states, for genotype-by-environment (G×E) modelling. Sub-populations defined from exomic profiles were coincident with barley's biology, geography and history, and explained a high proportion of trial phenotypic variance. Clear G×E interactions indicated adaptation profiles that varied for landraces and cultivars. Exploration of circadian clock-related genes, associated with the environmentally-adaptive days to heading trait (crucial for the crop's spread from the Fertile Crescent), illustrated complexities in G×E effect directions, and the importance of latitudinally-based genic context in the expression of large effect alleles. Our analysis supports a gene-level scientific understanding of crop adaption and leads to practical opportunities for crop improvement, allowing the prioritisation of genomic regions and particular sets of lines for breeding efforts seeking to cope with climate change and other stresses.

Exome sequences and multi-environment field trials elucidate the genetic basis of adaptation in barley / D. Bustos-Korts, I.K. Dawson, J. Russell, A. Tondelli, D. Guerra, C. Ferrandi, F. Strozzi, E.L. Nicolazzi, M. Molnar-Lang, H. Ozkan, M. Megyeri, P. Miko, E. Çakır, E. Yakışır, N. Trabanco, S. Delbono, S. Kyriakidis, A. Booth, D. Cammarano, M. Mascher, P. Werner, L. Cattivelli, L. Rossini, N. Stein, B. Kilian, R. Waugh, F.A. van Eeuwijk. - In: PLANT JOURNAL. - ISSN 0960-7412. - (2019 May 20). [Epub ahead of print] [10.1111/tpj.14414]

Exome sequences and multi-environment field trials elucidate the genetic basis of adaptation in barley

A. Tondelli;N. Trabanco;L. Rossini;
2019-05-20

Abstract

Broadening the genetic base of crops is crucial for developing varieties to respond to global agricultural challenges such as climate change. Here, we analysed a diverse panel of 371 domesticated lines of the model crop of barley to explore the genetics of crop adaptation. We first collected exome sequence data and phenotypes of key life history traits from contrasting multi-environment common garden trials. Then we applied refined statistical methods, including based on exomic haplotype states, for genotype-by-environment (G×E) modelling. Sub-populations defined from exomic profiles were coincident with barley's biology, geography and history, and explained a high proportion of trial phenotypic variance. Clear G×E interactions indicated adaptation profiles that varied for landraces and cultivars. Exploration of circadian clock-related genes, associated with the environmentally-adaptive days to heading trait (crucial for the crop's spread from the Fertile Crescent), illustrated complexities in G×E effect directions, and the importance of latitudinally-based genic context in the expression of large effect alleles. Our analysis supports a gene-level scientific understanding of crop adaption and leads to practical opportunities for crop improvement, allowing the prioritisation of genomic regions and particular sets of lines for breeding efforts seeking to cope with climate change and other stresses.
Barley; H. vulgare ssp. Vulgare; adaptation; common garden trials; exome sequence haplotypes; genetic diversity; genotype-by-environment interactions
Settore AGR/07 - Genetica Agraria
20-mag-2019
Article (author)
File in questo prodotto:
File Dimensione Formato  
tpj.14414.pdf

accesso aperto

Tipologia: Publisher's version/PDF
Dimensione 1.99 MB
Formato Adobe PDF
1.99 MB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/645946
Citazioni
  • ???jsp.display-item.citation.pmc??? 11
  • Scopus 23
  • ???jsp.display-item.citation.isi??? 24
social impact