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<p>To breed for climate resilient crops, an understanding of the genetic and environmental factors influencing adaptation is critical. Barley provides a model species to study adaptation to climate change. Here we present a detailed analysis of genetic variation at a major photoperiod response locus and relate this to the domestication history and dispersal of barley. The <i>PPD-H1</i> locus (a <i>PSEUDO-RESPONSE REGULATOR 7</i>) promotes flowering under long-day conditions, and a natural mutation at this locus resulted in a recessive, late-flowering <i>ppd-H1</i> allele. This mutation proved beneficial in high-latitude environments such as Northern Europe, where it allows extended vegetative growth during long spring days. We infer the origin of the mutated late-flowering <i>ppd-H1</i> allele by re-sequencing a large geo-referenced collection of 942 <i>Hordeum spontaneum</i>, 5 <i>Hordeum agriocrithon</i> and 1110 domesticated (<i>Hordeum vulgare</i>) barleys. We demonstrate that the late-flowering phenotype originated from Desert-type wild barley in the Southern Levant and present evidence suggesting a post-domestication origin of the mutated <i>ppd-H1</i> allele.</p>

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On the origin of the late-flowering ppd-H1 allele in barley

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月10日

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  • Rajiv Sharma,
  • Salar Shaaf,
  • Kerstin Neumann,
  • Peter Civan,
  • Yu Guo,
  • Martin Mascher,
  • Michal David,
  • Adnan Al-Yassin,
  • Hakan Özkan,
  • Tom Blake,
  • Sariel Hübner,
  • Nora P. Castañeda-Álvarez,
  • Stefania Grando,
  • Salvatore Ceccarelli,
  • Michael Baum,
  • Andreas Graner,
  • George Coupland,
  • Klaus Pillen,
  • Ehud Weiss,
  • Ian J. Mackay,
  • Wayne Powell,
  • Benjamin Kilian

摘要

To breed for climate resilient crops, an understanding of the genetic and environmental factors influencing adaptation is critical. Barley provides a model species to study adaptation to climate change. Here we present a detailed analysis of genetic variation at a major photoperiod response locus and relate this to the domestication history and dispersal of barley. The PPD-H1 locus (a PSEUDO-RESPONSE REGULATOR 7) promotes flowering under long-day conditions, and a natural mutation at this locus resulted in a recessive, late-flowering ppd-H1 allele. This mutation proved beneficial in high-latitude environments such as Northern Europe, where it allows extended vegetative growth during long spring days. We infer the origin of the mutated late-flowering ppd-H1 allele by re-sequencing a large geo-referenced collection of 942 Hordeum spontaneum, 5 Hordeum agriocrithon and 1110 domesticated (Hordeum vulgare) barleys. We demonstrate that the late-flowering phenotype originated from Desert-type wild barley in the Southern Levant and present evidence suggesting a post-domestication origin of the mutated ppd-H1 allele.