. Experiments with plants. Botany. . .VA'H' KiyiiS OF PLANTS 411 of this point; it is a cross betweeu the Freiii;h Prune (shown in Fig. L'o(j) and the Pond Plum (a Euroijean Plum about one and three-quarter inches in length),. 231. luereaseJ bize in I'lums due to hybridization ' williout seleetion\ Japanese parent on tlie left, American on the right, hybrid in the center. Two-thirds natural size. and was brought to its present huge size by con- tinued selection: it therefore owes its size to crossing plus selection. Another offspring of the French Prune, called the Sugar Prune (Fig. 'lo
. Experiments with plants. Botany. . .VA'H' KiyiiS OF PLANTS 411 of this point; it is a cross betweeu the Freiii;h Prune (shown in Fig. L'o(j) and the Pond Plum (a Euroijean Plum about one and three-quarter inches in length),. 231. luereaseJ bize in I'lums due to hybridization ' williout seleetion\ Japanese parent on tlie left, American on the right, hybrid in the center. Two-thirds natural size. and was brought to its present huge size by con- tinued selection: it therefore owes its size to crossing plus selection. Another offspring of the French Prune, called the Sugar Prune (Fig. 'lo'l), is not only much larger but ripens a month earlier and is even sweeter than the parent, running as high as about 24 per cent sugar, or f)i'i''tical]y one-fourth of the total weight of the fresh fruit. This was obtained simply by selection, no crossing having been done. Tliese three instances illustrate very well the different ways of securing increased size. , .p. -, . 2:jJ. Infreased size in Plums due entirely lo O. rJy producing vane- selection (without crrcj-^ing). French Pmne , . , . ,-, (dried) on the left; Sugar Prune (dried) on ties which ripen a mOntn the nght. two thirds natural Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Osterhout, Winthrop John Van Leuven, 1871-. New York, The Macmillan company; London, Macmillan & co. , ltd.
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