. Botany for agricultural students . Botany. HYBRIDIZATION 563 ceptible to Rust, with Wheat, immune to Rust but less desirable in other features, a type of Wheat having the Rust resistance of one parent and the desirable features of the other has been obtained. Cotton producing longer and better lint has been obtained by crossing the Sea Island Cotton with the Upland Cottons. There are many instances in which more desirable races have been secured through Fig. 486. — The effect of three degrees of relationship in breeding Corn. Nos. 3 and 4 are pure strains from seed-stock inbr


. Botany for agricultural students . Botany. HYBRIDIZATION 563 ceptible to Rust, with Wheat, immune to Rust but less desirable in other features, a type of Wheat having the Rust resistance of one parent and the desirable features of the other has been obtained. Cotton producing longer and better lint has been obtained by crossing the Sea Island Cotton with the Upland Cottons. There are many instances in which more desirable races have been secured through Fig. 486. — The effect of three degrees of relationship in breeding Corn. Nos. 3 and 4 are pure strains from seed-stock inbred for three years. No. 2 is from a close-fertilized seed-stock, the plants each year being fertilized with pollen from sister plants grown from the same ear. No. 1 is from seed-stock that has been cross-fertilized for three years. After Montgomery. The greatest advantage arising from hybridization is among plants propagated by vegetative methods, as by tubers, bulbs, cuttings, layering, grafting, etc.; for in these cases the progeny is simply a continuation of the hybrid individual and not the result of the fusion of gametes. Many berries, vegetables, fruit trees, and ornamental plants are hybrids. By crossing different kinds of Strawberries, hybrids more desirable than either of the parents have been obtained, and since they propagate by run-. 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 Martin, John N. (John Nathan), b. 1875. New York : John Wiley & Sons, Inc.


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1919