Crack resistance of pods in some varieties of winter rapeseed

摘要

The aim of the study was to determine susceptibility of seven distinct varieties of winter rapeseed (Lisek, Californium,Kronos, NK Faire, Nelson, Smart, and Toccata) to seed pod cracking. The resistance to pod's cracking was determined by applying torque under twist of 180° in a special holder using INSTRON device. The developed method allowed the researchers to determine the twisting angle at which seed pod cracking occurs (pod's resilience), the maximum torque required for pod cracking,as well as overall force applied to shatter a pod. The results of the study point for the Nelson and Toccata varieties to be the most resistant to seed pod cracking, and exhibiting higher resistance than the Kronos variety. The pods of these varieties were also described in terms of much higher twist angle values at which seed pod crack occurs.