AWhat changed
The double-cross approach used crosses between hybrids derived from inbred lines to make hybrid maize seed production more practical. Jones’s work helped translate hybrid-vigour research into a usable seed-production method.
Scientific scope
The double-cross approach used crosses between hybrids derived from inbred lines to make hybrid maize seed production more practical. Jones’s work helped translate hybrid-vigour research into a usable seed-production method. Scope limitation: This is a specific breeding and seed-production contribution, not the origin of maize domestication, all knowledge of heterosis or every later hybrid. Earlier inbreeding research, seed producers and farmers remain part of the wider history.
Evidence
Assessment uses the catalogue-linked source evidence for the stated contribution. This is a specific breeding and seed-production contribution, not the origin of maize domestication, all knowledge of heterosis or every later hybrid. Earlier inbreeding research, seed producers and farmers remain part of the wider history.
Contributors
- Donald F. Jones · SCIENCE: Named source contributor; exact labor shares are not measured.
Provisional WRS assessment, edition 2026-10-16.1. Independent expert calibration is pending. This grade does not certify correctness or assign ownership.
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