‘NDMutant1’: A Novel Determinate Interspecific Grapevine for Genetic and Physiological Study and Breeding Applications

in HortScience

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A grapevine is generally characterized as a woody vine. However, within the North Dakota State University Grape Germplasm Enhancement Project, a novel determinate natural mutant, with natural self-limited growth and reproductive habit, was discovered and designated Vitis NDMutant1. The genotype resulted from self-pollination of a vine designated Vitis ND 733 (unreleased). The resulting genotype displays a determinate, shrub-like growth and reproductive habit with continuous flowering capabilities. The plant has been successfully propagated through green shoot tip cuttings as well as budding, giving rise to propagules having the same unique growth habit and demonstrating the stability of

Contributor Notes

Corresponding author. E-mail: h.hatterman.valenti@ndsu.edu.

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    Pedigree of NDMutant1.

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    Schematic outlining the growth pattern of NDMutant1.

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    Determinate growth of grapevine NDMutant1 (A1) stem growth and (A2) apical termination in comparison with the wild-type parent ND 733 (B1) stem growth and (B2) apical morphology; (C) the shrub form of NDMutant1; (D) NDMutant1 showing continuous flowering capability from flower initiation through berry maturation; and (E) altered nodal buds converted to groups of singly borne flower structures.

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