A 'Regent' pedigree update: ancestors, offspring and their confirmed resistance loci

Authors

  • F. Röckel Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany https://orcid.org/0000-0002-2197-0669
  • O. Trapp Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany
  • E. Zyprian Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany https://orcid.org/0000-0003-1095-1996
  • L. Hausmann Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany https://orcid.org/0000-0002-4046-9626
  • D. Migliaro CREA - Research Centre for Viticulture and Enology, Conegliano (Treviso), Italy https://orcid.org/0000-0001-8366-4942
  • S. Vezzulli Research and Innovation Centre, Edmund Mach Foundation, San Michele all'Adige, Italy
  • R. Töpfer Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany https://orcid.org/0000-0003-1569-2495
  • E. Maul Julius Kühn Institute (JKI) - Federal Research Centre for Cultivated Plants, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany

DOI:

https://doi.org/10.5073/vitis.2021.60.189-193

Abstract

'Regent' is the fungal resistant grapevine cultivar with the highest acreage in Germany and an important resistance donor in international breeding programs. It carries the resistance loci Rpv3.1 as well as Ren3 and Ren9 against downy and powdery mildew, respectively. As the parents of 'Chambourcin', the resistant paternal ancestor of 'Regent', did not coincide with the breeder's information, the germplasm repository of JKI Geilweilerhof was screened to find the missing ancestors. SSR marker analysis revealed that 'Joannes Seyve 11369' and 'Plantet' are the true parents of 'Chambourcin' and not 'Seyve Villard 12-417' and 'Chancellor'. Furthermore, the origin of the resistance loci Ren3 and Ren9 could be traced back to the genotypes 'Seibel 4614' and 'Munson'. Since the breeder Hermann Jaeger mentioned 'Munson' as a direct descendant of Vitis aestivalis Michx. var. linsecomii (Buckley) L. H. Bailey and Vitis rupestris Scheele, one of these wild species might have been the donor of the loci.

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Published

2021-10-26

Issue

Vol. 60 No. 4 (2021): Vitis

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Article

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