. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. SPECIES HYBRIDIZATION 241 sylvestris in all their characters. These latter plants are fertile and in succeeding generations give oiTspring which to all indications are pure sylvestris individuals. Similarly when pollen of the A'', tabacum parent is used, the sesqui-hj^brids are of a varietj^ of forms, but all approximate. FiQ 104.—Nicotiana tabacum "Cuba" (left) and its i^i hybrid with N. syhestris (right). (After Goodspeed and Clausen.) the N. tabacum parent in their characters and no on
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. SPECIES HYBRIDIZATION 241 sylvestris in all their characters. These latter plants are fertile and in succeeding generations give oiTspring which to all indications are pure sylvestris individuals. Similarly when pollen of the A'', tabacum parent is used, the sesqui-hj^brids are of a varietj^ of forms, but all approximate. FiQ 104.—Nicotiana tabacum "Cuba" (left) and its i^i hybrid with N. syhestris (right). (After Goodspeed and Clausen.) the N. tabacum parent in their characters and no one could determine by studying them that they were only once removed from A^. sylvestris. Those which most closely approximated the A^. tabacum parent in morphological characters are also most fertile and give rise to fertile races which do not differ significantly from the A'', tabacum parent. 18 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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