Induced mutations in turfgrasses as a source of variation for improved cultivars1
- J.B. Powell
Mutation breeding of vegetatively propagated turf bermudagrasses (Cynodon spp.) has resulted in an unusually large number of mutations, many of which may be economically important. Gamma radiation of dormant rhizomes of ‘Tifgreen’ and ‘Tifway’ cultivars and actively growing stolons of ‘Tufcote’ bermudagrass slightly alter the characteristics of otherwise excellent cultivars. Genotypic differences among the cultivars influenced the visible mutations. The nonsectoring mutant propagules were more common than were the chimera-derived propagules. Thus, diplontic selection and chimeral formation do not hinder the use of mutation-breeding techniques in bermudagrass. The most common types of mutations observed were lighter green plants, dwarfing, rate of spread changes, dark reddish-purple plants, and a number of leaf morphology changes. Ionizing radiation should be considered an additional tool for the plant breeder to improve vegetatively propagated turf bermudagrasses. Additional index words: Chimeras, Dwarfing, Vegetative propagation, Rhizomes, Stolons, Dosages, Gamma radiation, Morphological mutants, Radiosensitivity, Rads, Physical mutagens, Cynodon spp.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 1974. . Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA