. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. SELECTION 337 single head selection made by Roberts in 1906. Altogether he made 557 selections from nearly 200 different varieties; but nearly 415 of these were discarded within 2 years. The Plant-to-row Method.—Single plant selections are usually grown in garden rows, each row from a different plant. Final selection of the individual plants should be preceded by field observations, noting habit, vigor, disease resistance, season of bloom, time of maturity, productivity, etc. Each of these plants m
. Genetics in relation to agriculture. Livestock; Heredity; Variation (Biology); Plant breeding. SELECTION 337 single head selection made by Roberts in 1906. Altogether he made 557 selections from nearly 200 different varieties; but nearly 415 of these were discarded within 2 years. The Plant-to-row Method.—Single plant selections are usually grown in garden rows, each row from a different plant. Final selection of the individual plants should be preceded by field observations, noting habit, vigor, disease resistance, season of bloom, time of maturity, productivity, etc. Each of these plants must be harvested separately and careful. Fig. Spreading and erect pure lines of Gypsy wheat, 1907. ) {After Williams, Ohio records should be made concerning yield and other important characters. It is on the basis of .the field observations and the data from the harvested plants that a further selection must be made. From each of the plants finally selected sufficient seed is taken for a row of about 25 plants. The rows should be evenly placed and plants should be equidistant in the row. By subjecting these rows to severe selection the future work may be considerably reduced. Hence careful notes should be taken throughout the season and at harvesting time. Of several hundred rows only a few may be found good enough to be continued. The third year the 22 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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