Breeding Rotundifolia Grapes. 
33 
less than one per cent, of the hybrid vines produced large flower clus¬ 
ters. But where the Scuppernong* was crossed with a male having 
very large flower clusters, fifteen, or nearly five per cent of the hybrids 
have large flower clusters, and seven or over two per cent have very 
large flower clusters. It will be seen that none of the hybrids pro¬ 
duced very large flower clusters except those resulting from the male 
having very large flower clusters (See Figs. 14, 15, and 16). 
In this classification we have designated flower clusters as follows: 
Those having from 1-9 flowers as “very small”, 10-29 as “small”, 30-59 
as “medium”, 60-89 as “large”, and 90 or more as “very large.” 
Size of Fruit in the Clusters. 
That the size of the flower clusters determines in a measure the 
size of the fruit cluster will be seen from the following table: 
TABLE NO. 11. 
Table Showing Size of Fruit Clusters in the Hybrids. 
Parents 
Size of Fruit Clusters 
Very 
Small 
1-3 
Small 
4-9 
Medium 
10-19 
Large 
20-30 
Very 
Large 
30+ 
Scuppernong X Male having small flower clusters_ 
3 
5 
0 
0 
0 
Scuppernong X Male with large flower clusters. 
221 
94 
24 
0 
0 
Scuppernong X Male with large flower clusters. .. . 
39 
90 
171 
4 
0 
James X Male with large flower clusters . _ 
35 
15 
3 
0 
0 
Thomas X Male with large flower clusters__ 
17 
11 
1 
0 
0 
This table corresponds fairly well with the previous one which gives 
the size of the flower clusters. Where the Scuppernong was crossed 
with a male having small flower clusters all of the hybrids produced 
either small or very small fruit clusters. When this variety is crossed 
with a male having large sized flower clusters seven per cent of the 
hybrids produced medium sized fruit clusters. When it is crossed 
with a male having very large flower clusters fifty-six per cent of 
the hybrids have medium sized clusters, and over one per cent have large 
fruit clusters. The results from the James and Thomas crossed with 
a male having large sized flower clusters are self explanatory. 
These results show that the male vine is of considerable import¬ 
ance in determining the size of the fruit clusters of the hybrids. There¬ 
fore every effort should be made to find the male vines having the 
very largest flower clusters, where any breeding work is attempted. 
Records in our possession show that all the vines which produce 
small flower clusters always produce very small fruit clusters. Also 
that the very largest fruit clusters are produced on vines which pro¬ 
duce very large flower clusters. But the size of the fruit cluster does 
3 
