| Variety Name |
UCD GRN-3 |
| Common Synonyms |
9365-43 |
| All Synonyms |
9365-43, Walker 9365-43 |
| Countries of Origin |
USA |
| Species |
It includes Vitis rufotomentosa, Vitis champinii, c9038 (Vitis monticola)
|
| Breeder |
Dr. Andy Walker |
| Institution |
University of California, Davis |
| Year Released |
2008 |
| Status of Ownership |
Proprietary to UC Regents |
| Pedigree |
Several species, including Vitis rufotomentosa, Vitis champinii, c9038 (a wild collection from Texas that appears to contain Vitis monticola), Vitis riparia |
| Uses |
Rootstock |
| Comments |
UCD GRN-3™ and UCD GRN-4™ are siblings. GRN-3™ has strong nematode resistance from V. rufotomentosa, V. champinii 'Dog ridge' and c9038 (a wild collection from Texas that appears to contain V. monticola, a species with exceptional drought and mineral tolerance). Vitis monticola is the only Vitis species that is truly drought tolerant and grows on pure limestone on mesquite and juniper in central Texas. This selection produces moderate vigor mothervines with long canes and moderate lateral production. Cuttings root very well and their rooting angles are intermediate in depth. It has excellent nematode resistance and has moderate resistance to ring nematode. This selection resembles V. champinii, while its sibling appears more V. riparia-like. Nevertheless, the rooting angles of the two siblings are similar. UCD GRN-4™ has slightly lower nematode resistance than UCD GRN-3™ but is a more vigorous mothervine. |
