#chromosome duplication
- Allopolyploidy — The state, property, or structural phenomenon consisting of the presence of more than two chromosome sets originating from distinct species following interspecific hybridization. Allopolyploidy represents a major evolutionary engine in the plant kingdom, allowing the instantaneous emergence of new, fertile species reproductively isolated from their parents, combining the genetic advantages of both ancestral lines.
- Autopolyploid — An organism or cell possessing more than two complete sets of homologous chromosomes (triploid, tetraploid, etc.), derived entirely from the multiplication of the genome of the same species, without the input of foreign genetic material. This structural genomic mutation phenomenon usually occurs through chromosome non-disjunction during meiosis or mitosis, serving as a major evolutionary driver in the plant kingdom, responsible for the emergence of varieties with enhanced productivity and resilience.
- Autopolyploidy — A structural genomic state or mutation characterized by the presence of more than two complete sets of homologous chromosomes within the cell nucleus, derived entirely from the same species due to endogenous duplication of genetic material without interspecific hybridization. This phenomenon occurs through the disruption of cell division (mitotic or meiotic non-disjunction) and plays a major role in the evolution and diversification of the plant kingdom, frequently causing morphological changes such as increased cell and organ size, as well as enhanced plant resilience.
- Autotetraploid — A polyploid organism or cell possessing four identical sets of chromosomes (4n), all derived through the multiplication or duplication of the base chromosome set of the same species, without interspecific hybridization. This structural genetic phenomenon, frequently encountered in the plant kingdom, often leads to plants with larger vegetative organs, bulkier flowers, and increased resistance to environmental factors.