Abstract:Non-arrowing and broad-leaved mutants of Rhodes grass have been isolated following gamma irradiation . The green forage yield in non-arrowing and broad-leaved types were respectively 67 and 171 percent more than the control . Crude protein, nitrogen and calcium fractions nearly doubled in the non-arrowing type and remained approxymately the same in the broad-leaved type over controls .
“…More than 1800 cultivars obtained either as direct mutants or derived from their crosses have been released worldwide in 50 countries (Ahloowalia and Maluszynski 2001). Radiation‐induced mutations have also been used in generating forage grasses and turfgrasses with modifications in various morphological traits (Krishna et al. 1984).…”
To generate new breed lines of bermudagrass and reduce management costs of turfgrass, gamma-ray irradiation was used for induction of dwarf mutants from a native bermudagrass (Cynodon dactylon) germplasm. Three dwarf-type mutant lines (7-9, 10-5 and 10-12) were isolated from 3000 irradiated stolons. The data from 3-year greenhouse tests and 2-year field tests indicated that the dwarf mutant lines had lower canopy height, shorter internodes and shorter leaves. The line 7-9 had a similar turf coverage rate to the wild-type control, while the lines 10-5 and 10-12 had a slower turf coverage rate than the wild-type control. Under drought stress, all three dwarf mutant lines maintained higher relative water content and lower ion leakage than the wild type in the greenhouse tests. The field tests showed that the dwarf mutant lines had lower leaf firing during a progressive drying of soil. Our results indicated that bermudagrass mutants induced by gamma radiation exhibited dwarf characteristics and improved drought resistance, which was probably associated with unbalance of plant hormones in vivo.
“…More than 1800 cultivars obtained either as direct mutants or derived from their crosses have been released worldwide in 50 countries (Ahloowalia and Maluszynski 2001). Radiation‐induced mutations have also been used in generating forage grasses and turfgrasses with modifications in various morphological traits (Krishna et al. 1984).…”
To generate new breed lines of bermudagrass and reduce management costs of turfgrass, gamma-ray irradiation was used for induction of dwarf mutants from a native bermudagrass (Cynodon dactylon) germplasm. Three dwarf-type mutant lines (7-9, 10-5 and 10-12) were isolated from 3000 irradiated stolons. The data from 3-year greenhouse tests and 2-year field tests indicated that the dwarf mutant lines had lower canopy height, shorter internodes and shorter leaves. The line 7-9 had a similar turf coverage rate to the wild-type control, while the lines 10-5 and 10-12 had a slower turf coverage rate than the wild-type control. Under drought stress, all three dwarf mutant lines maintained higher relative water content and lower ion leakage than the wild type in the greenhouse tests. The field tests showed that the dwarf mutant lines had lower leaf firing during a progressive drying of soil. Our results indicated that bermudagrass mutants induced by gamma radiation exhibited dwarf characteristics and improved drought resistance, which was probably associated with unbalance of plant hormones in vivo.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.