32 
BULLETIN 1483, U. S. DEPARTMENT OF AGRICULTURE 
normal fruits but having only comparatively few oil cells in the 
rind have also been observed. These and other limb variations are 
being tested in progeny propagations, and the early fruiting of 
these trees indicates that the characteristics of the parent-limb 
variations have been perpetuated through budding. 
LESSONS FROM THE PROGENY TESTS 
These various progeny tests indicate the inheritance of the dif- 
ferent characters which were noted as limb variations and show the 
necessity for care in the selection of bud wood for commercial 
propagation in order to avoid the perpetuation of such undesirable 
variations in orchard plantings. Individual-fruit variations typical 
of all of the recognized strains of the Valencia orange have been 
observed from time to time in these investigations in trees other- 
wise normal, but these instances of bud variations have not been 
reported in detail in this bulletin. The limb variations are of 
Fig. 19. — Coarse yellow Valencia orange fruits with orange-colored ridges. These were 
grown on progeny tree No. 11-29, as listed in Table 14, which was propagated from a 
similar variation. Riverside, Calif., June, 1925. (About three-fourths natural size) 
greater economic importance than the single-fruit variatons by rea- 
son of the probability that in obtaining bud wood for nursery pur- 
poses buds taken unintentionally from such limbs have perhaps 
given rise to many of the trees of the diverse strains observed in 
many of the older orchards of this variety in the Southwest. 
Some of the limb variations studied in this work have been found 
to be uniform in their fruit and foliage characteristics throughout 
all of the branches. These limbs, in the light of the performance of 
the progeny trees propagated from them, are considered to be in- 
herently stable. On the other hand, many of the limb variations 
show a mixed or variable condition of fruiting, and in some instances 
produce both the fruit and foliage characters typical of the variation 
and normal fruits or foliage as well. As a result of the progeny tests 
of such of these limb variations as have been studied, they are con- 
sidered to be inherently unstable from the fact that the progeny trees 
also produce both fruit and foliage characteristic of the variations 
and also normal fruits and foliage. 
