Major chromosome 5H haplotype switch structures the European two-rowed spring barley germplasm of the past 190 years

dc.contributor.authorWonneberger, Ronja
dc.contributor.authorSchreiber, Miriam
dc.contributor.authorHaaning, Allison
dc.contributor.authorMuehlbauer, Gary J.
dc.contributor.authorWaugh, Robbie
dc.contributor.authorStein, Nils
dc.contributor.departmentPediatrics, School of Medicine
dc.date.accessioned2024-02-13T18:09:06Z
dc.date.available2024-02-13T18:09:06Z
dc.date.issued2023-07-21
dc.description.abstractSelection over 70 years has led to almost complete fixation of a haplotype spanning ~ 250 Mbp of chomosome 5H in European two-rowed spring barleys, possibly originating from North Africa. Plant breeding and selection have shaped the genetic composition of modern crops over the past decades and centuries and have led to great improvements in agronomic and quality traits. Knowledge of the genetic composition of breeding germplasm is essential to make informed decisions in breeding programs. In this study, we characterized the structure and composition of 209 barley cultivars representative of the European two-rowed spring barley germplasm of the past 190 years. Utilizing high-density SNP marker data, we identified a distinct centromeric haplotype spanning a ~ 250 Mbp large region on chromosome 5H which likely was first introduced into the European breeding germplasm in the early to mid-twentieth century and has been non-recombining and under strong positive selection over the past 70 years. Almost all cultivars in our panel that were released after 2000 carry this new haplotype, suggesting that this region carries one or several genes conferring highly beneficial traits. Using the global barley collection of the German Federal ex situ gene bank at IPK Gatersleben, we found the new haplotype at high frequencies in six-rowed spring-type landraces from Northern Africa, from which it may have been introduced into modern European barley germplasm via southern European landraces. The presence of a 250 Mbp genomic region characterized by lack of recombination and high levels of fixation in modern barley germplasm has substantial implications for the genetic diversity of the modern barley germplasm and for barley breeding.
dc.eprint.versionFinal published version
dc.identifier.citationWonneberger R, Schreiber M, Haaning A, Muehlbauer GJ, Waugh R, Stein N. Major chromosome 5H haplotype switch structures the European two-rowed spring barley germplasm of the past 190 years. Theor Appl Genet. 2023;136(8):174. Published 2023 Jul 21. doi:10.1007/s00122-023-04418-7
dc.identifier.urihttps://hdl.handle.net/1805/38453
dc.language.isoen_US
dc.publisherSpringer
dc.relation.isversionof10.1007/s00122-023-04418-7
dc.relation.journalTheoretical and Applied Genetics
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourcePMC
dc.subjectChromosomes
dc.subjectHaplotypes
dc.subjectHordeum
dc.subjectPhenotype
dc.subjectPlant breeding
dc.titleMajor chromosome 5H haplotype switch structures the European two-rowed spring barley germplasm of the past 190 years
dc.typeArticle
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