A crop grown from a mixture of seed of almost genetically identical breeding lines (isogenic) which have all agronomic characters in common, but differ in major gene resistance, thereby confronting pests with a mixture of host gene-types. Found on http://www.encyclo.co.uk/visitor-contributions.php
A crop grown from a mixture of seed of almost genetically identical breeding lines (isogenic) which have all agronomic characters in common, but differ in major gene resistance, thereby confronting pests with a mixture of host gene-types.