Abstract
AbstractLodging is the major factor that determines whether pea (Pisum sativum L.) can be mechanically harvested. The aim of this experiment was to investigate the relationship between stem mechanical parameters (diameter, stem wall thickness, stiffness [rigidity], and maximum self‐weight moment [stem strength]) and lodging in pea. Three years of data on stem mechanical parameters and 2 yr of data on lodging resistance were collected on the ‘Carneval’ × ‘MP1401’ pea cultivars and Wt10245 × Wt11238 lines. Mechanical parameters were measured separately for three stem sections: lower, middle, and upper. Nine quantitative trait loci (QTL) associated with stem mechanical parameters were identified in the Carneval × MP1401 genetic map. Eight QTL associated with stem mechanical parameters were identified in the Wt10245 × Wt11238 genetic map. These results confirmed QTL for lodging resistance found previously, especially in regards to located in chr5LG3 close to the A004 marker. Quantitative trait loci for stem diameter and stem strength of the upper and lower stem colocated with the Rfs marker in chr5LG3. A plant height QTL was detected close to AB141 marker, 2 cM (3.3 Mbp) from the Le gene. These results enable identification of pea genomic regions associated with agriculturally important traits and provide a foundation for further research to improve lodging resistance in pea.
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