Sauvignon Rytos

Grapevine

Variety Description

Variety used for comparison: 'Rieslaner'

Summary: The petiole of the mature leaf of 'Sauvignon Rytos' is moderately longer than that of the middle vein while the petiole of 'Rieslaner' is moderately shorter than that of the main vein. The berry shape of 'Sauvignon Rytos' is narrow ellipsoid while it is globose for 'Rieslaner'.

Description:

YOUNG SHOOT TIP: fully opened, sparse to medium density of prostrate hairs, very weak to weak intensity of anthocyanin colouration of prostrate hairs, absent or very sparse erect hairs
SHOOT: dorsal side of internodes and nodes are green and red, ventral side of internodes and nodes are green, absent or very sparse erect hairs on internodes, erect to semi-erect attitude (before tying)
WOODY SHOOTS: dark brown, absent or very sparse erect hairs on internodes, mid to late season bud burst
TENDRILS: short to medium length

PETIOLE: moderately longer than middle vein of mature leaf blade
YOUNG LEAF BLADE: upper side light copper red, sparse prostrate hairs between main veins on lower side, absent or very sparse erect hairs on main veins on lower side
MATURE LEAF BLADE: one lobe, medium sized, circular, weak to medium degree of blistering on upper side, slightly open arrangement of lobes of petiole sinus, absent or very low proportion of main veins on upper side with anthocyanin colouration
MATURE LEAF BLADE (LOWER SIDE): absent to very sparse prostrate hairs between main veins, absent or very sparse erect hairs on main veins
TEETH OF LEAF MARGIN: medium length, small to medium length to width ratio, both sides convex

FLOWER: hermaphrodite type

BERRY BUNCH: medium sized, dense to very dense, medium length peduncle of primary bunch
BERRY: begins ripening mid to late season, small, narrow ellipsoid, moderately easy to detach from pedicel, flavour is other than muscat, foxy or herbaceous, seed formation complete
BERRY SKIN: yellow green (without bloom), medium thickness
BERRY FLESH: moderately firm, absent or very weak intensity of anthocyanin colouration

Origin & Breeding History: 'Sauvignon Rytos' originated from a controlled cross conducted between the female parent variety 'Sauvignon' and the male parent variety 'Bianca' made by the University of Udine and the Institute for Applied Genomics in Udine, Friuli Venezia Giulia Region of Italy in June 2002. The controlled cross was conducted using cluster isolation and flower emasculation in the seed parent and cluster isolation in the pollen donor prior to flowering. The resulting seedling was selected at the Servadei experimental farm in Udine, Italy based on resistance to mildew, tolerance to Oidium, medium vigour, chemical composition of the berries, wine quality and grafting affinity. 'Sauvignon Rytos' was selected and designated in 2010. The genetic identity of the seedling was verified by DNA microsatellite markers. From 2011 to 2013, the variety was evaluated in production plots of 25 or 100 individuals in two ecologically different sites, Udine and Fossalon Grado, on rootstocks 1103 Paulsen and Kober 5BB.

Tests & Trials: The detailed description of 'Sauvignon Rytos' is based on the UPOV report of Technical Examination, application number 20150359, purchased from the Community Plant Variety Office in Angers, France. The trials were conducted at the Bundessortenamt in Hannover, Germany from 2017 to 2018.

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Grapevine: 'Sauvignon Rytos'

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Grapevine: 'Sauvignon Rytos'

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Grapevine: 'Sauvignon Rytos'