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On the origin of six-rowed barley with brittle rachis, agriocrithon [Hordeum vulgare ssp. vulgare f. agriocrithon (Åberg) Bowd.], based on a DNA marker closely linked to the vrs1 (six-row gene) locus - Theoretical and Applied Genetics

  • ️Takeda, K.
  • ️Sat Oct 30 2004

Abstract

The origin of six-rowed cultivated barley has been revealed to be more complex since the discovery of agriocrithon, a six-rowed barley with brittle rachis. The present study investigates whether such six-rowed brittle barley is wild or hybrid in nature, by analyzing genetic diversity at the cMWG699 marker locus, which is closely linked to the vrs1 (six-row gene) locus. DNA sequence analysis for 42 accessions showed only three types in six-rowed brittle barleys; in contrast, nine sequence types were found in ten wild barleys, ssp. spontaneum, in our previous study. Nucleotide diversities for the six-rowed brittle barley were 2.8–4.5 times lower than that for the ssp. spontaneum at this marker locus. The three sequence types found in the six-rowed brittle barley also appeared in the six-rowed cultivated barley. A cross-allelism test confirmed that the six-rowed character of the six-rowed brittle barley was controlled by the vrs1 locus. The nucleotide diversity and genealogy demonstrated that f. agriocrithon does not have the same level of diversity as found in wild barley, ssp. spontaneum. Consequently, f. agriocrithon does not appear to represent genuinely wild populations, but more probably originated from hybridization between ssp. spontaneum and six-rowed cultivated barley.

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Acknowledgements

The author thanks Dr. G. Willcox, Institut de Préhistoire Orientale, Jalès, France, for his critical reading of the manuscript, and thanks also to Dr. K. Yamane, University of Kyoto, Japan, and Dr. K. Fukunaga, University of Renne, France, for their comments on the manuscript. This study was supported by the Japan Society for the Promotion of Science for Young Scientists.

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  1. K. Tanno

    Present address: Institut de Prèhistoire Orientale, CNRS, Jalès, Berrias, St-Paul-le-Jeune, 07460, France

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  1. Research Institute for Bioresources, Okayama University, Chuo 2-20-1, Kurashiki, 710-0046, Japan

    K. Tanno & K. Takeda

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  1. K. Tanno

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Correspondence to K. Tanno.

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Communicated by F. Salamini

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Tanno, K., Takeda, K. On the origin of six-rowed barley with brittle rachis, agriocrithon [Hordeum vulgare ssp. vulgare f. agriocrithon (Åberg) Bowd.], based on a DNA marker closely linked to the vrs1 (six-row gene) locus. Theor Appl Genet 110, 145–150 (2004). https://doi.org/10.1007/s00122-004-1816-4

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  • Received: 29 August 2004

  • Accepted: 01 September 2004

  • Published: 30 October 2004

  • Issue Date: December 2004

  • DOI: https://doi.org/10.1007/s00122-004-1816-4

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