Sheegene 21

Grapevine

Variety Description

Varieties used for comparison: 'Sheegene 2' and 'Sheegene 11'

Summary: The time of bud burst occurs mid-season for 'Sheegene 21' whereas bud burst occurs very early for 'Sheegene 2'. The young leaf of 'Sheegene 21' has no erect hairs on the main veins on the lower side of the blade whereas the young leaf of 'Sheegene 11' has a medium number of erect hairs on the main veins on the lower side of the blade. The mature leaf of 'Sheegene 21' has five lobes whereas the mature leaf of 'Sheegene 11' has seven lobes. The depth of the upper lateral sinuses of the mature leaf is shallow for 'Sheegene 21' whereas the depth is medium for 'Sheegene 11'. The berry of 'Sheegene 21' has no particular flavour whereas the berry of both reference varieties has a muscat flavour.

Description:

YOUNG SHOOT TIP: fully open, sparse prostrate hairs, absent or very weak 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, predominantly horizontal attitude (before tying)
WOODY SHOOTS: orange brown, time of bud burst is predominantly mid-season
TENDRILS: predominantly medium length

YOUNG LEAF: green upper side with anthocyanin spots, absent or very sparse prostrate hairs between main veins on lower side of blade, absent or very sparse erect hairs between main veins on lower side of blade
MATURE LEAF: medium size blade, wedge shaped, five lobes, medium degree of blistering on upper side, shallow upper lateral sinuses, strongly overlapping arrangement of lobes of upper lateral sinuses, slightly open lobes of petiole sinus, length of petiole is moderately shorter than length of middle vein
MATURE LEAF (UPPER SIDE): absent or very low proportion of main veins with anthocyanin colouration
MATURE LEAF (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, medium length to width ratio, mixture of both sides straight and both sides convex

FLOWER: fully developed stamens and fully developed gynoecium present

BERRY BUNCH: large, predominantly lax density (single berries with some pedicels visible), peduncle of primary bunch is medium length
BERRY: begin ripening early, medium size, broad ellipsoid shape, difficult to detach from pedicel, no particular flavour, rudimentary formation of seeds
BERRY SKIN: yellow (without bloom), medium thickness
BERRY FLESH: moderately firm, absent or very weak instensity of anthocyanin colouration

Origin & Breeding History: 'Sheegene 21' originated from a cross made in 1999 in California, USA, between the variety 'Red Globe', as the female parent, and the variety 'Princess', as the male parent. From the resulting progeny, 'Sheegene 21' was selected in 2000 for its green and seedless berries, early berry maturity, strong woody stems and branches, and adaptability to commercial handling. In 2000, 'Sheegene 21' was propagated asexually by Timothy Sheehan from a block of Vitis vinifera plants located near Fowler, California, USA, and planted as rooted cuttings in May 2007, in a field located north west of Delano, California.

Tests & Trials: The detailed description of 'Sheegene 21' is based on the UPOV report of Technical Examination, application number 20100342, purchased from the Oficina Española de Variedades Vegetales, Ministerio de Agricultura y Pesca, Alimentación y Medio Ambiente, in Madrid, Spain. The trial was conducted by the Centro de Ensayos de Evaluación de Variedades del Instituto Nacional de Investigación y Tecnologia Agraria y Alimentaria, in Murcia, Spain, from 2011 to 2014.

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Grapevine: 'Sheegene 21'