Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting: Guelph, Ontario, September 3, 4, 5, 1947
Science
Northern Nut Growers Association Report of the Proceedings at the Thirty-Eighth Annual Meeting: Guelph, Ontario, September 3, 4, 5, 1947
Northern Nut Growers Association -- Periodicals; Nut trees -- Periodicals; Nuts -- Periodicals
In referring to the results presented in table I, it will be noted that
considerable variation occurred in the performance of the five lots of
seedlings as stock, as well as in the take of buds from the five parent
trees. The totals in the last column on the right are all equivalent to
percentage since 100 buds were placed on each lot of seedlings. In like
manner, the totals in the bottom line are all equivalent to percentages
since 100 buds of each parent tree were used.
Seedlings of stock D were decidedly inferior to seedlings of stock C in
take of buds, and both of these lots of seedlings originated from large
nuts. Also, scion e gave a significantly lower take of buds on all lots
of seedlings than scions c or d. The scion e tree produces small nuts
whereas the scion c and d trees produce large nuts. Scions a and b are
intermediate in take of buds, and the source trees both produce small
nuts.
Discussion
At least one significant interpretation may be made from the results of
this experiment, that may partially explain the difficulties encountered
heretofore in propagating chestnuts. Using the take of buds as a
criterion it can be stated that in this experiment the five lots of
seedlings from known parents differed in their performance as stocks.
Moreover, the five parent trees used as a source of budwood differed
among themselves in the capacity of their buds to grow when placed on
comparable lots of stocks. If these results are correctly interpreted it
is clear that both the stock and the scion may influence the success or
failure of propagation technique. Doubtless both of these variables have
operated together in the propagation of existing varieties and, as would
be expected, the results have been unpredictable. It seems likely that
the grafting and budding of chestnut varieties should be worked out in
the future on the basis of using understocks derived from the seed of
special trees or clones found to be suitable sources by tests for
grafting performance.
It should be pointed out that the five trees used in this work
originated from two lots of seed imported from neighboring localities in
China and probably are closely related. The fact that significant
differences were obtained in this material furnishes basis for the
belief that great variability in the budding performance of the Chinese
chestnut is to be encountered in the many introductions that have been
made into this country.
Table I. Results of budding each of five Chinese chestnut clones on
its own seedlings and on the seedlings of four other clones. The
figure for each combination represents the number of buds that grew
out of 20 buds placed.
SCION
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