Abstract            Volume:11  Issue-9  Year-2023         Original Research Articles

Online ISSN : 2347 - 3215 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcret@gmail.com

Genetic diversity is degree of differentiation between or within species. Genetic variation is a measure of the genetic differences that exist within a population. Variation in crop plant can come either from environment or genetic difference. Genetic variability is the occurrence of variation among individual, due the difference in genetic composition. Variability is pre-request for crop improvement in plant breeding. Without variation among individual or species no need of crop improvement. The paper, therefore, aims to reviewing the overview of genetic variability and it is implication in crop improvement. Variation in crop plant can either due to genetic or environmental variation. There are different method of creating variability in crop for breeding purpose like, genetic recombination, mutation, ploidy modification, transposable element, gene transfer and soma-clonal variation. Genetic variation is important in natural selection that allows for increase or decrease in frequency of population. The existence of variation in crop plant enable individual to adapt new or changing environment. Variation in crop plant also important for adaptation of individual to changing or new environment, yield improvement and development of disease resistance. Therefore exploiting available genetic variation in crop plant or creating variation is corner stone for plant breeding program.

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