Growth pattern of crossbred Holstein Friesian heifer calves in an organized farm

Abstract :

Abstract Investigations on the oyster mushroom Pleurotus eous APK1 were conducted to enhance the yield performance by the process mutagenesis . The wild strain of P. eous APK1 was mutated by physical and chemical mutagens such as UV radiation with two different time intervals (15 and 30 minutes) and ethidium bromide (200 µg/ml concentration). The mother spawn was developed for the wild and mutant strains using sorghum grains and subsequently cultivated in paddy straw by poly propylene bag method. Among the three mutant strains, UV30 has grown rapidly but biomass content was significantly equal to wild strain. Other two mutants UV15 and EtBr200 had slightly increased in their biomass when compared to the wild strain, particularly the UV15 mutant yielded high biomass in a single harvest. The morphological characteristics, growth rate and high yield of UV mutant strains, proved that the UV irradiation could be used as an effective physical mutagen for strain improvement.