High Temperature Affects Agronomic Characters and Yield Related Traits of Maize Hybrid ‘Xindan 68’

doi:10.11924/j.issn.1000-6850.casb19030027

Abstract

Abstract:

In the study, ‘Xindan 68’ was used as materials and ‘Zhengdan 958’ was used as control, the effects of high temperature on the growth period, agronomic characters and yield related traits were studied in 2016 and 2018. The results showed that under the high temperature in 2018, the maturity period of ‘Xindan 68’ and ‘Zhengdan 958’ was ahead of time, and anthesis-to-silking interval was extended. The plant height, ear height, and tassel main axis length of ‘Xindan 68’ and ‘Zhengdan 958’ all increased significantly, but the effect on the total leaf number and tassel branch number was not obvious. Under high temperature, the yield of ‘Zhengdan 958’ decreased, its yield related traits such as 100-kernel weight and kernel number per row were reduced, and its bare ear length increased. The high temperature also had some effects on the yield and yield-related traits of ‘Xindan 68’, but the difference was not significant, indicating that ‘Xindan 68’ had a certain degree of high temperature resistance compared with ‘Zhengdan 958’.

Key words: maize, high temperature, agronomic characters, yield related traits

CLC Number:

S513

Wei Xiaoyi, Wei Feng, Hong Defeng, Ma Yi, Ma Junfeng, Wang Jiamu, Zhang Xueshun. High Temperature Affects Agronomic Characters and Yield Related Traits of Maize Hybrid ‘Xindan 68’[J]. Chinese Agricultural Science Bulletin, 2020, 36(18): 22-26.

Figures/Tables 7

References 25

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品种	年份	出苗期	拔节期	抽雄期	吐丝期	散粉期	成熟期
新单68	2016	5 a	39 a	54 a	57 a	57 a	104 c
新单68	2018	5 a	38 a	54 a	58 a	56 a	102 d
CK	2016	5 a	40 a	54 a	58 a	58 a	109 a
CK	2018	5 a	41 a	55 a	61 a	58 a	107 b

品种	年份	出苗期	拔节期	抽雄期	吐丝期	散粉期	成熟期
新单68	2016	5 a	39 a	54 a	57 a	57 a	104 c
新单68	2018	5 a	38 a	54 a	58 a	56 a	102 d
CK	2016	5 a	40 a	54 a	58 a	58 a	109 a
CK	2018	5 a	41 a	55 a	61 a	58 a	107 b

品种	年份	株高/cm	穗位高/cm	总叶片数	雄穗主轴长度/cm	雄穗分枝数
新单68	2016	291.3 B	117.5 B	19.7 a	31.4 B	6.7 B
新单68	2018	302.9 A	128.1 A	19.7 a	34.5 A	7.0 B
CK	2016	254.0 D	107.3 C	20.0 a	15.4 D	11.7 A
CK	2018	266.1 C	119.5 B	19.7 a	18.6 C	11.3 A

品种	年份	株高/cm	穗位高/cm	总叶片数	雄穗主轴长度/cm	雄穗分枝数
新单68	2016	291.3 B	117.5 B	19.7 a	31.4 B	6.7 B
新单68	2018	302.9 A	128.1 A	19.7 a	34.5 A	7.0 B
CK	2016	254.0 D	107.3 C	20.0 a	15.4 D	11.7 A
CK	2018	266.1 C	119.5 B	19.7 a	18.6 C	11.3 A

年份	性状	穗位高	总叶片数	雄穗主轴长度	雄穗分枝数
2016年	株高	0.993^**	0.683	0.857^*	0.974^**
	穗位高		0.591	0.912^**	0.894^*
	总叶片数			0.208	-0.500
	雄穗主轴长度				0.551
2018年	株高	0.859^*	0.637	0.755	0.837^*
	穗位高		0.410	0.811*	0.491
	总叶片数			-0.478	0.766
	雄穗主轴长度				0.255