The estimated 10 000 Old World varieties are thought to derive from the single wild species
V. vinifera, of Middle Asia. Grapes were collected from wild vines long before cultivation …

… and HP OLMO … and HP Olmo with the … HP Olmo …

… A collection of vinifera vines, used in the study of sex conversion of male vines, showed these
characteristics (Negi and Olmo 1971a). Male vines also blossom in advance, and continue …

Varieties of Vitis vinifera can be successfully and easily crossed with the pollen from various
clones of rotundifolia, but all reciprocal combinations failed. The particular vinifera variety …

A synthetic (reputed) kinin, SD 8339, at 1000 parts per million in alcohol solution, applied to
flower clusters of a male grapevine about 3 weeks before anthesis, completely converted the …

… THOMPSON AND HP OLMO Department of Viticulture and Enology, University of California,
Davis, California … OLMO, HP 1942. Breeding new tetraploid grape varieties. Proc, Amer. …

The first generation hybrid of V. vinifera x V. rotundifolia (VR hybrids) has tolerance or immunity
to some of the most important diseases and insects of the V. vinifera grape. By a second …

Fanleaf degeneration is one of the most serious grapevine diseases. Caused by grapevine
fanleaf virus (GFLV), it is compounded by the feeding damage of Xiphinema index Thorne …

1. A review of the literature indicates that two chromosome numbers have been given for Vitis
vinifera: n=19 and n=20. 2. The somatic chromosome number of 86 cultivated varieties has …

The grape varieties Burgrave, Dattier, Molinera, Muscat of Alexandria, Olivette Blanche and
Ribier were analysed with regard to correlations between seed weight and berry weight, the …