. Breeding crop plants. Plant breeding. 218 HREEDIKC CJiOl' 1'LANTS correlation coefficients. Two nurseries had been planted on .siu'cccding years with the same strains taken fr(jni the same original lot of seed. The percentage of killing of tlie various strains in one nursery during the winter of 1908-09 was correlated with similar data collected from the other nursery after the winter of 1910-11. A correlation coefficient of + ± was obtained. Some of the surviving plants of the different alfalfa strains were selfed and the seeds so obtained were planted separately in. Fig. ij'.i.—Co
. Breeding crop plants. Plant breeding. 218 HREEDIKC CJiOl' 1'LANTS correlation coefficients. Two nurseries had been planted on .siu'cccding years with the same strains taken fr(jni the same original lot of seed. The percentage of killing of tlie various strains in one nursery during the winter of 1908-09 was correlated with similar data collected from the other nursery after the winter of 1910-11. A correlation coefficient of + ± was obtained. Some of the surviving plants of the different alfalfa strains were selfed and the seeds so obtained were planted separately in. Fig. ij'.i.—Coiiiijarative Imrdiness of Grimrii and common alfalfas. The two rows in the center are from Grimm seed. At either side arc rows grown from southern grown common seed. 1916 season. (Photo loaned by Arny.) a third nursery. Percentage of winter killing of these strains was taken and the correlation coefficient between the percentage of winter killing of the parental stock and that of the new strains was determined. The correlation coefficient obtained was + ± The mean w^inter killing (expressed in per- centage) of the parental stock was + as compared with ± for the strains coming from selfed seed. In other words, progress has been made toward isolating hardy 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
