Breeding Rotundifolia Grapes 
29 
All the hybrids resulting from this cross are dark in color hence, all 
of them will produce only dark fruit, either black or red. The black 
color of the Flowers is completely dominant over the light color of the 
pure light male. From these results we must conclude that the Flowers 
is homozygous for the dark color, and does not contain the light color 
even in recessive form. To obtain white fruited seedlings from this 
variety it will be necessary to again cross these first generation seed¬ 
lings with a pure light male, or to breed them inter-se. Since the 
Flowers possesses some valuable characters such as prolificacy, large 
clusters and excellent clinging qualities, it may prove of considerable 
value in breeding work. The undesirable characters of this variety, 
which must be eliminated, a,re its tough flesh, and very poor quality. 
TABLE NO. 6. 
Table Showing the Colors of Memory Hybrids. 
Cross 
Color of Plants 
Color of Fruit 
Memory X Light Male No. 1___ 
Light 6 
Dark 6 
No vines in bearing 
Memory X Light Male No. 1..- .. _ _ 
1 
' Light 108 
Dark 110 
No vines in bearing 
The fruit of Memory is black. When this variety is crossed with 
the pure light male vines, that were used in this work, practically one 
half of the resulting hybrids are light and one half are dark in color. 
Memory, therefore is heterozygous for the factors for both the light 
and the dark colors. From this it will be seen that Memory is a natural 
hybrid, that somewhere back in its ancestry a light colored vine and 
a dark colored vine were crossed, and as one of the hybrid offspring 
Memory retains the factors for both the light and the dark colors. 
These breeding results show that it is a very simple matter to obtain 
either light or dark colored seedlings from this variety. Since by 
crossing with a light colored male vine one half of the seedlings will 
be light, the possibilities of producing a valuable white fruiting variety 
is evident. 
We have always regarded the Memory as one of the most valuable 
varieties of this group; and from the results obtained it is evident that 
this variety will prove of great value in breeding work. It has a 
characteristic oval shape, is prolific, clings fairly well to the cluster, 
and the fruit is sweet and of excellent quality. 
TABLE NO. 7. 
Table Showing the Color of the Latham Hybrids. 
Cross 
Color of Plants 
Color of Fruit 
Latham X Light Male Vine No. 1. ... _ 
| Light 3 
[ Dark 3 
No vines in bearing 
Latham X Light Male No. 1.. ..._ __ 
Light 65 
Dark 30 
No vines in bearing 
