Evaluation of lodging resistance in rice based on an optimized parameter from lodging index

Abstract Lodging is being increasingly recognized as a critical concern among crop breeders worldwide it causes significant reduction in the grain yield and quality of multiple cereal crops. The lodging index frequently used for evaluating resistance rice ( Oryza sativa L.) However, application comparing susceptibility between different cultivars inadequate under certain special conditions. This study was aimed to identify optimized parameters that would evaluate could then be along with further assessing resistance. A total 32 representative accessions from countries were grown at two locations on three sowing dates over period 3 yr. analysis revealed value 200 threshold evaluated accessions. Subsequently, an parameter proposed. interpreted magnitude external force basal second internode withstand. comparison values previously unknown lodging‐resistant variety R379. enable accurate determination cultivars, thereby contributing effective selection breeding programs.