. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. â :^'-"' A^ >'r W'. 2j^. Fig. 103.âNicotiana sylvestris (left), A'", tabacum angvstifolia (right) and the Fi hybrid (center). (After Goodspecd and Clausen.) The significant feature of these hybrids, however, is the hereditary behavior which they display. They are almost completely sterile, but if the plants are grown under reduced conditions of culture and the flowers are hand pollinated with pollen from either of the parent species, a few seeds are set, but not more than about 1 per c
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. â :^'-"' A^ >'r W'. 2j^. Fig. 103.âNicotiana sylvestris (left), A'", tabacum angvstifolia (right) and the Fi hybrid (center). (After Goodspecd and Clausen.) The significant feature of these hybrids, however, is the hereditary behavior which they display. They are almost completely sterile, but if the plants are grown under reduced conditions of culture and the flowers are hand pollinated with pollen from either of the parent species, a few seeds are set, but not more than about 1 per cent, of the number ordi- narily produced by the parents. If A^. sylvestris pollen is used to polli- nate the Fi, the sesqui-hybrids thus obtained are of diverse types, most of them abnormal, but about 10 per cent, closely N. Digitized by Microsoft®. 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 Babcock, E. B. (Ernest Brown), b. 1877; Clausen, Roy Elwood, 1891-. New York, McGraw-Hill; [etc. , etc. ]
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