Research on Lodging Resistant Characteristics of Brassica napus L. Variety ‘Qinyou 1618’

doi:10.11924/j.issn.1000-6850.casb2023-0459

Abstract

Abstract:

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.

Key words: ‘Qinyou 1618’, Brassica napus L., lodging resistance, stem characters, plant architectures, root traits

ZHANG Zhongxin, WANG Xuefang, ZHANG Yaowen, GUAN Zhoubo, DONG Yuhong, ZHENG Lei, YANG Li. Research on Lodging Resistant Characteristics of Brassica napus L. Variety ‘Qinyou 1618’[J]. Chinese Agricultural Science Bulletin, 2024, 40(6): 48-52.

Figures/Tables 5

References 30

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品种	木质素/%	粗纤维/%
秦优1618	20.35	28.19
秦优7号(CK)	13.98	22.58
比CK±/%	45.57	24.84
显著性检验	^**	^**

品种	木质素/%	粗纤维/%
秦优1618	20.35	28.19
秦优7号(CK)	13.98	22.58
比CK±/%	45.57	24.84
显著性检验	^**	^**

品种	20cm	40cm	60cm	80cm
秦优1618	129.00	105.05	90.77	59.12
秦优7号(CK)	63.57	49.35	38.06	23.25
比率	2.03	2.13	2.38	2.54
显著性检验	^**	^**	^**	^**

品种	20cm	40cm	60cm	80cm
秦优1618	129.00	105.05	90.77	59.12
秦优7号(CK)	63.57	49.35	38.06	23.25
比率	2.03	2.13	2.38	2.54
显著性检验	^**	^**	^**	^**

品种	10cm	30cm	50cm	70cm
秦优1618	115.65	94.90	71.09	50.77
秦优7号(CK)	58.84	42.53	32.69	28.33
比率	1.97	2.23	2.17	1.79
显著性检验	^*	^**	^*	^*