. Breeding crop plants. Plant breeding. 278 BREEDING CROP PLANTS made and 407 trees were grown. Some varieties were obtained with larger fruits but these as yet have not been thoroughly tested for hardiness. Pears have been frequently tried in the Dakotas but have failed for two causes (Hansen, 1915): (1) Lack of hardiness; (2) susceptibility to blight. The Chinese sandpear, Pyrus ^P %mWjw Fig. 64.—Wolf, a hardy variety of plums which lacks (nuilitj- of fruit. (Photo loaned by Dorsey.) sinensis Lindley, obtained from Dr. Sargent, of the Arnold Arboretum, proved perfectly hardy and resistant to
. Breeding crop plants. Plant breeding. 278 BREEDING CROP PLANTS made and 407 trees were grown. Some varieties were obtained with larger fruits but these as yet have not been thoroughly tested for hardiness. Pears have been frequently tried in the Dakotas but have failed for two causes (Hansen, 1915): (1) Lack of hardiness; (2) susceptibility to blight. The Chinese sandpear, Pyrus ^P %mWjw Fig. 64.—Wolf, a hardy variety of plums which lacks (nuilitj- of fruit. (Photo loaned by Dorsey.) sinensis Lindley, obtained from Dr. Sargent, of the Arnold Arboretum, proved perfectly hardy and resistant to blight. Various crosses between this species and cultivated pears be- longing to Pyrus commwnis have been made. Preliminary tests have shown that some of the seedlings were blight losistant and hardy. Th(>s(> results iiulicate that the problem of producing. Vui. (^Burhaiik, a iiluiii of hinli ( proiluccd 1).\' LuiIut liurbank. It lacks hardiness when nrowii in Minnesota. (Photo loaned hy Donscy.) pears for the Northwest may eventually be solved. In a some- what analogous manner, Hansen (1911) has produced new plum varieties by crossing the native sand cherry with Japanese plums. This has resulted in a "happy combination of hardiness, rapid growth and early bearing of tree, with large size and choice quality of ;. 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 Hayes, Herbert Kendall, b. 1884; Garber, Ralph John, b. 1890. New York [etc. ] : McGraw-Hill book company, inc.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectplantbr, bookyear1921
