|Botanical Name:||Vitis labrusca|
Sheehan Genetics LLC
2500S Fowler Avenue
United States of America
Timothy P. Sheehan, Sheehan Genetics LLC, Fresno, United States of America
|Agent in Canada:||
Vineland Research and Innovations Centre Inc.
4890 Victoria Avenue North
P.O. Box 4000
Vineland Station, Ontario
Variety used for comparison: 'Isabella'
Summary: On the mature leaf, the prostrate hairs between the main veins on the lower side of the blade are absent or very sparse on 'Sheegene 26' whereas they are very dense on 'Isabella'. 'Sheegene 26' has berries with grey-red skin whereas 'Isabella' has berries with blue-black skin. The formation of seeds in the berries of 'Sheegene 26' is rudimentary whereas it is complete for those of 'Isabella'.
YOUNG SHOOT TIP: fully opened, dense prostrate hairs, 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, semi-erect attitude (before tying)
WOODY SHOOTS: yellowish brown, early time of bud burst
TENDRILS: medium length
YOUNG LEAF: upper side green with anthocyanin spots, dense 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, circular shape, three lobes, absent or very weak blistering on upper side, absent or very shallow upper lateral sinuses, open arrangement of lobes of upper lateral sinuses, half open lobes of petiole sinus, short teeth, medium length to width ratio of teeth, one side of teeth is concave and the other side is convex, absent or very low proportion of main veins on upper side with anthocyanin colouration, absent to very sparse prostrate hairs between main veins on lower side, absent or very sparse erect hairs on main veins on lower side, length of petiole equal to the length of middle vein
FLOWER: hermaphrodite type
FRUIT CLUSTER: medium size, medium density (densely distributed berries, pedicels not visible, berries movable), peduncle of primary bunch is short
BERRY: begin ripening very early in season, medium size, globose shape, moderately easy to detach from pedicel, foxy flavour, rudimentary formation of seeds
BERRY SKIN: grey red, medium thickness
BERRY FLESH: moderately firm, absent or very weak anthocyanin colouration
Origin & Breeding History: 'Sheegene 26' originated from a cross made between unknown parents in the late spring of 2000 in Fowler, California, USA. The initial seedling of 'Sheegene 26' was selected based on the production of seedless grapes, berry shape, berry skin colour and foxy flavour. The variety was asexually propagated in the dormant season of 2003 and grafted onto a grape rootstock. The new variety was developed in Murcia, Spain in 2005.
Tests & Trials: The detailed description of 'Sheegene 26' is based on the UPOV report of Technical Examination, CPVO reference number SFS/BC7501789/20110004839, application number 2010/2597, purchased from the CPVO, Angers, France. The trials were conducted by the Consiglio Per La Ricerca E La Sperimentazione in Agricoltura at the Centro Di Recerca Per La Viticoltura in Conegliano, Italy from 2011 to 2014.
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