Page 62 - Grapevine MayJune 2021_REV

Around The Vineyard

Grape Selections from the

VitisGen and VitisGen2 Projects

By: Janet van Zoeren and Tim Martinson
T he VitisGen and VitisGen2 projects rep- USDA-ARS, Crop Diseases,

Pests and Genetics Unit
resent major investments in understand-
ing grapevine genetics – and particularly
in identifying markers associated with desirable San Joaquin Valley Agricultural Sciences Center
Parlier, CA
traits for use in ‘marker-assisted selection’. DNA Craig Ledbetter, Research Geneticist
markers identified by geneticists and breeders are
now incorporated into several selections and map- Y308-314-08 This is
ping populations by grape breeding programs in a mid-season table
California, Minnesota, New York, and Missouri.
grape selection with
powdery mildew
We asked VitisGen2 breeders to provide photos resistance, which has
and brief descriptions of a few of their selections the Ren4 gene. It was
and mapping populations and the traits they incor- sufficiently attrac-
porate. Where appropriate, we have highlighted tive for trialing with
the verified presence of genes through the use of other advanced table
markers in blue.
grape selections. It

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