Genetic association with high-resolution climate data reveals selection footprints in the genomes of barley landraces across the Iberian Peninsula.

Autor: Contreras-Moreira B; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain.; Fundación ARAID, Zaragoza, Spain., Serrano-Notivoli R; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain., Mohammed NE; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain.; Faculty of Agriculture, Agronomy Department, Sohag University, Sohag, Egypt., Cantalapiedra CP; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain., Beguería S; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain., Casas AM; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain., Igartua E; Estación Experimental de Aula Dei (EEAD-CSIC), Zaragoza, Spain.
Jazyk: angličtina
Zdroj: Molecular ecology [Mol Ecol] 2019 Apr; Vol. 28 (8), pp. 1994-2012. Date of Electronic Publication: 2019 Apr 02.
DOI: 10.1111/mec.15009
Abstrakt: Landraces are local populations of crop plants adapted to a particular environment. Extant landraces are surviving genetic archives, keeping signatures of the selection processes experienced by them until settling in their current niches. This study intends to establish relationships between genetic diversity of barley (Hordeum vulgare L.) landraces collected in Spain and the climate of their collection sites. A high-resolution climatic data set (5 × 5 km spatial, 1-day temporal grid) was computed from over 2,000 temperature and 7,000 precipitation stations across peninsular Spain. This data set, spanning the period 1981-2010, was used to derive agroclimatic variables meaningful for cereal production at the collection sites of 135 barley landraces. Variables summarize temperature, precipitation, evapotranspiration, potential vernalization and frost probability at different times of the year and time scales (season and month). SNP genotyping of the landraces was carried out combining Illumina Infinium assays and genotyping-by-sequencing, yielding 9,920 biallelic markers (7,479 with position on the barley reference genome). The association of these SNPs with agroclimatic variables was analysed at two levels of genetic diversity, with and without taking into account population structure. The whole data sets and analysis pipelines are documented and available at https://eead-csic-compbio.github.io/barley-agroclimatic-association. We found differential adaptation of the germplasm groups identified to be dominated by reactions to cold temperature and late-season frost occurrence, as well as to water availability. Several significant associations pointing at specific adaptations to agroclimatic features related to temperature and water availability were observed, and candidate genes underlying some of the main regions are proposed.
(© 2019 The Authors. Molecular Ecology Published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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