Field Evaluation of Clubroot-Resistant Rape Varieties in Disease Area of Southwest Yunnan

Abstract

Figures/Tables 12

References 28

doi:10.11923/j.issn.2095-4050.cjas2023-0061

Abstract:

In this study, we clarified the field resistance, main agronomic traits and yield performance of ‘Huashuang 5R’ and ‘Huayouza 62R’, to screen out excellent disease-resistant varieties in the clubroot disease areas. Field experiments were carried out in three rape clubroot disease areas of Tengchong City, Lianghe County and Linxiang County in southwest Yunnan Province. And the varieties developed by our group and local main varieties were used as controls. The results of field experiments showed that the two clubroot-resistant varieties of ‘Huashuang 5R’ and ‘Huayouza 62R’ could mature normally and overwinter safely at the three test sites, with a growth period of 176-199 d, and the performance of each growth period was uniform. ‘Huashuang 5R’ and ‘Huayouza 62R’ showed high resistance to clubroot disease in Tengchong and Lianghe, and disease resistance in Linxiang. The agronomic traits of ‘Huashuang 5R’ and ‘Huayouza 62R’ were good in the three test sites. Compared with the seven control varieties in three test sites, the yield of ‘Huashuang 5R’ was reduced by 2.71% compared with ‘Yunyouza No.12’ in Lianghe; and the yield of ‘Huashuang 5R’ compared with ‘Yunyouza No.12’ and ‘Za 1256’ in Tengchong, ‘Yunyouza 15’ and ‘Huayou No.8’ in Lianghe, ‘Yunyouza No.12’ and ‘Deyou No.1’ in Linxiang was increased by 7.49% to 56.83%; the yield of ‘Huayouza 62R’ was 5.76% lower than that of ‘Yunyouza No.12’ in Lianghe, and was 4.61% lower than ‘Deyou No.1’ in Linxiang; and the yield of ‘Huayouza 62R’ compared with ‘Yunyouza No.12’ and ‘Za 1256’ in Tengchong, ‘Yunyouza 15’ and ‘Huayou No.8’ in Lianghe, ‘Yunyouza No.12’ in Linxiang was increased by 4.12% to 51.90%. ‘Huashuang 5R’ and ‘Huayouza 62R’ showed strong resistance to clubroot disease in the three test sites, with growth period of 176-199 d, and the agronomic traits and yields were normal compared to controls, and could be used as main cultivars in southwest Yunnan Province where clubroot disease was serious.

Key words: rape, clubroot disease, resistance identification, resistant varieties, field cultivation

ZHAO Kaiqin, ZHANG Lifan, ZHANG Yunyun, LIU Yu, LUO Jiajie, YANG Zhaochun, LUO Yanqing. Field Evaluation of Clubroot-Resistant Rape Varieties in Disease Area of Southwest Yunnan[J]. Journal of Agriculture, 2024, 14(2): 16-22.

云油杂12号(CK₁)

杂1256(CK₂)

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品种名称	出苗期	苗期	蕾薹期	花期	成熟期	生育期
华双5R	6	92	20	39	38	195
华油杂62R	6	98	19	41	35	199
云油杂12号(CK₁)	6	103	21	41	31	202
德油1号(CK₂)	6	98	22	40	38	204

品种名称	出苗期	苗期	蕾薹期	花期	成熟期	生育期
华双5R	6	92	20	39	38	195
华油杂62R	6	98	19	41	35	199
云油杂12号(CK₁)	6	103	21	41	31	202
德油1号(CK₂)	6	98	22	40	38	204

品种	生育期根肿病病情						病情指数均值	抗性评价
	苗期		初花期		成熟期
	发病率/%	病情指数	发病率/%	病情指数	发病率/%	病情指数
华双5R	0a	0a	7.11a	2.73a	8.62a	3.71a	2.12	HR
华油杂62R	2.72b	1.01a	8.23a	2.71a	12.23b	4.72ab	2.83	HR
云油杂12号(CK₁)	6.72c	3.21b	14.41b	4.91b	15.43c	6.01bc	4.71	HR
杂1256(CK₂)	5.32c	1.52a	15.8b	5.82b	16.62c	6.83c	4.74	HR