Mutation Breeding in Fruit Crops: Historical Milestones, Technological Advances, and Practical Applications

Abstract— Mutation breeding offers an effective strategy for the genetic improvement of fruit crops, particularly those hindered by long juvenile phases, complex reproductive barriers, or limited genetic variability. By inducing heritable changes using physical (e.g., gamma rays, X-rays, ion beams) or chemical (e.g., EMS, sodium azide) mutagens, desirable traits can be introduced without disrupting the overall genetic integrity of elite cultivars. Historically, mutation breeding began in the early 20th century and has since led to the official release of over 3,000 improved crop varieties worldwide. Key achievements include the development of disease-resistant, seedless, dwarf, and early-maturing cultivars in species such as Japanese pear, guava, papaya, and banana. The use of in vitro techniques like somatic embryogenesis and cell suspension cultures has enhanced mutation efficiency, especially in vegetative propagated crops, by reducing chimerism and allowing high-throughput screening. Recent advancements such as TILLING, EcoTILLING, and insertional mutagenesis (via T-DNA and transposons) enable precise gene targeting and rapid identification of mutant alleles. Molecular markers and tissue culture-based selection techniques further accelerate the breeding cycle and improve selection accuracy. Success in mutation breeding depends on factors such as optimal mutagen dose, treatment duration, tissue sensitivity, and genotype. Strategic integration of traditional mutation techniques with modern biotechnological tools has greatly improved the ability to develop superior fruit cultivars with enhanced tolerance to biotic and abiotic stresses, improved quality, and better adaptability. Mutation breeding thus remains a valuable approach in sustainable fruit crop improvement.