isogenotype

An isogenotype refers to a group of genetically identical organisms that share the same genotype, meaning they possess the same set of genetic instructions. This concept is commonly used in plant breeding, microbiology, and genetics to describe organisms that are clones or derived from a single parent through asexual reproduction or vegetative propagation. In plants, for example, isogenotypes may arise from cuttings, grafting, or tissue culture techniques, ensuring uniformity in traits such as disease resistance, growth habit, or yield potential.

The term is particularly relevant in plant pathology, where isogenotypes can be used to study disease susceptibility or resistance. By comparing genetically identical plants exposed to different pathogens, researchers can isolate genetic factors influencing infection outcomes. In microbiology, isogenotypes may describe bacterial or fungal strains that are genetically uniform but may differ in phenotypic traits due to environmental influences or mutations.

Isogenotypes are distinct from isozymes, which refer to different molecular forms of the same enzyme, and from isogenic lines, which are genetically identical organisms differing only by a single targeted genetic modification. While isogenotypes emphasize overall genetic identity, they may still exhibit minor variations due to epigenetic changes or spontaneous mutations. This concept is valuable in experimental design, allowing researchers to control genetic variables while studying other factors such as environmental stress or genetic interactions.