The aim was to provide theoretical reference for better creating and breeding new germplasm and new varieties of rapeseed with lodging resistance.Taking'Qinyou 1618'and'Qinyou 7'(CK)as the test materials,the strong lodging-resistant characteristics of'Qinyou 1618'were comprehensively analyzed from the aspects of stem characters,plant architectures and root traits.The results showed that the lignin content(20.35％),crude cellulose content(28.19％),and average bending resistance(95.99 N/mm2)of the main stems of'Qinyou 1618'at maturity stage were all extremely significantly higher than those of CK,and the puncture strength(83.1 N/cm2)was significantly higher than that of CK.In particular,the middle and upper parts(60-80 cm)of the main stems had obvious advantages in bending resistance.Meanwhile,'Qinyou 1618'had a more reasonable plant architecture and a more developed root system:suitable plant height(168.5 cm,11.6 cm lower than that of CK),lower first-branch height(64.2 cm,9.9 cm lower than that of CK),higher number of branches(7.2 branches),high rate of stem solidity,longer main inflorescences,higher number of pods;and the root diameters differed significantly from that of CK at the final flowering stage.'Qinyou 1618'has an excellent performance in all of the above-mentioned aspects of lodging resistance,and it is an important direction for breeding new rapeseed varieties with lodging resistance by a comprehensive consideration of stem characters,plant architectures,root traits and other indicators rather than by a single indicator.
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