Biological Science: Research Developments and Innovations Vol. 3

Crop wild relatives (CWRs) retain evolutionary variation that was incompletely captured during domestication and subsequent crop improvement, making them strategically important for climate adaptation. Their value, however, depends on a chain of activities that begins with conservation and accession identity, continues through genomic and phenotypic discovery, and culminates in pre-breeding and cultivar-relevant validation. This critical narrative review evaluates that chain rather than treating conservation, genomics and breeding as separate domains. Literature published from 1997 to 5 July 2026 was examined through open scholarly indexes, agricultural and life-science databases, citation searching and authoritative institutional sources. Evidence was appraised for biological relevance, experimental design, genetic resolution, environmental realism, reproducibility and proximity to breeding deployment. The literature strongly supports the proposition that CWRs can supply alleles for stress tolerance, disease resistance, root architecture and quantitative productivity traits, but it also shows that useful diversity is unevenly conserved and often poorly connected to phenotypic evidence. Global genebanks provide indispensable long-term infrastructure, yet accession redundancy, taxonomic uncertainty, regeneration biology, incomplete passport information and uneven safety duplication can reduce practical value. Genebank-scale genotyping, pangenomics, landscape genomics and high-throughput phenotyping are improving the identification of candidate donors and adaptive loci, but reference bias, structural variation, population structure and genotype-by-environment interaction limit simple prediction from sequence to field performance. Introgression libraries and marker-assisted pre-breeding remain the most mature routes for transferring wild alleles, whereas genome editing and de novo domestication are promising but are supported mainly by proof-of-concept evidence. The central conclusion is that climate-resilient use of CWRs is constrained less by the existence of diversity than by discontinuities between conservation, data systems, phenotyping, pre-breeding and target-environment validation. The highest-value future investments are therefore those that make this entire pipeline interoperable, representative and testable under realistic climate stresses.