reticulate-evolution
Reticulate evolution describes the process by which new plant lineages arise through the partial merging of two ancestral lineages—via hybridization or horizontal gene transfer—rather than through simple branching, producing relationships better represented as a network than a family tree. This phenomenon is especially significant in plant science because flowering plants hybridize far more readily than animals, meaning many cultivated and wild species have complex, reticulate origins that a standard phylogenetic tree would misrepresent. Understanding reticulate evolution helps researchers accurately reconstruct plant diversification, trace the origins of polyploid species, and identify the genetic contributions of ancient hybridization events.
open_in_new WikipediaPubMed · 2026-05-01
Scientists mapped the wild roses of Xinjiang, China, using both physical traits and whole-genome analysis to untangle centuries of hybridization and species mixing. They found that these roses have freely exchanged genes across species boundaries, making them genetically diverse and surprisingly adaptable to harsh desert environments.
Analysis of 252 rose accessions (159 diploid, 93 tetraploid) identified 4.77 million genetic variants, revealing deep lineage structure and widespread gene exchange between species.
A combined approach using 10 diagnostic physical traits achieved 86.2% accuracy in distinguishing species that traditional single-method identification struggled to separate.
Dense hair on rose flower stalks was genetically linked to survival in hot, arid habitats, pointing to a specific adaptation mechanism in desert-dwelling roses.
