. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. SIGNIFICANCE OF SEXUALITY 247 lated two strains of corn and propagated them by self-fertiliza- tion and selection until thiey appeared almost if not quite homo- zygous. In this condition they were weak and stunted, and their ears had degenerated to nubbins (Fig. 137, A and D). He then crossed these two strains reciprocally, that is, the strain that was used as the mother in one cross was employed as the. Fig. 137.—A and D, Ears from two nearly homozygous strains of
. Plant anatomy from the standpoint of the development and functions of the tissues, and handbook of micro-technic. Plant anatomy. SIGNIFICANCE OF SEXUALITY 247 lated two strains of corn and propagated them by self-fertiliza- tion and selection until thiey appeared almost if not quite homo- zygous. In this condition they were weak and stunted, and their ears had degenerated to nubbins (Fig. 137, A and D). He then crossed these two strains reciprocally, that is, the strain that was used as the mother in one cross was employed as the. Fig. 137.—A and D, Ears from two nearly homozygous strains of Indian corn: B, offspring of strain A fertilized by strain D; C, offspring of strain D fertilized by strain A, . (After ShuU.) father in the next, and vice versa. Immediately the offspring from these crosses mounted in vigor, even above that of the cross-fertilized race from which the strains had been derived; yielding ears as shown in Fig. 137, B and C. Here A pollinated by D produced B, and D pollinated by A produced C. These results led to the notable suggestion by Shull that since. 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 Stevens, William Chase, 1861-. Philadelphia, P. Blakiston's Son
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplantanatomy, bookyea
