Table_7_Identification of Ideal Allele Combinations for the Adaptation of Spring Barley to Northern Latitudes.xlsx (8.72 MB)

Table_7_Identification of Ideal Allele Combinations for the Adaptation of Spring Barley to Northern Latitudes.xlsx

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posted on 03.05.2019, 15:08 by Magnus Göransson, Jón Hallsteinn Hallsson, Morten Lillemo, Jihad Orabi, Gunter Backes, Ahmed Jahoor, Jónatan Hermannsson, Therese Christerson, Stine Tuvesson, Bo Gertsson, Lars Reitan, Muath Alsheikh, Reino Aikasalo, Mika Isolahti, Merja Veteläinen, Marja Jalli, Lene Krusell, Rasmus L. Hjortshøj, Birger Eriksen, Therése Bengtsson

The northwards expansion of barley production requires adaptation to longer days, lower temperatures and stronger winds during the growing season. We have screened 169 lines of the current barley breeding gene pool in the Nordic region with regards to heading, maturity, height, and lodging under different environmental conditions in nineteen field trials over 3 years at eight locations in northern and central Europe. Through a genome-wide association scan we have linked phenotypic differences observed in multi-environment field trials (MET) to single nucleotide polymorphisms (SNP). We have identified an allele combination, only occurring among a few Icelandic lines, that affects heat sum to maturity and requires 214 growing degree days (GDD) less heat sum to maturity than the most common allele combination in the Nordic spring barley gene pool. This allele combination is beneficial in a cold environment, where autumn frost can destroy a late maturing harvest. Despite decades of intense breeding efforts relying heavily on the same germplasm, our results show that there still exists considerable variation within the current breeding gene pool and we identify ideal allele combinations for regional adaptation, which can facilitate the expansion of cereal cultivation even further northwards.

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