Wheat Variety ‘Wanmai632’: Tolerance Under Drought Stress

doi:10.11924/j.issn.1000-6850.casb2022-0012

Abstract

Abstract:

In order to explore the drought tolerance of new wheat variety ‘Wanmai632’, ‘Zhoumai18’ was used as the control in this study. Drought tolerance indexes were determined by the methods of simulating drought stress with PEG and natural drought stress. Without drought stress, there was no significant difference between ‘Wanmai632’ and ‘Zhoumai18’ in drought tolerance indexes. The yield of the two varieties was 7052 kg/hm² and 6916 kg/hm², respectively. Under drought stress, the germination rate and germination potential of ‘Wanmai632’ were 44.23% and 106.25% higher than those of ‘Zhoumai18’ at germination stage, respectively. The seedling height, root length, fresh weight of stem-leaf and root of ‘Wanmai632’ were 62.90%, 55.32%, 83.33% and 60.00% higher than those of ‘Zhoumai18’ at seedling stage, respectively. The plant height, maximum tillering number, effective spike number, grains per spike, 1000-grain weight and grain yield of ‘Wanmai632’ were 2.99%, 1.94%, 1.44%, 14.71%, 10.61% and 6.80% higher than those of ‘Zhoumai18’ at adult-plant stage, respectively. The differences of these characters were significant except that of effective spike number. In addition, the comprehensive drought tolerance index of ‘Wanmai632’ and ‘Zhoumai18’ was 0.901 and 0.582, respectively. To sum up, ‘Wanmai632’ has less inhibition on growth under drought stress. All the drought tolerance indexes of ‘Wanmai632’ are better than those of ‘Zhoumai18’. ‘Wanmai632’ has relatively high tolerance to drought stress and yield advantage in arid environment.

Key words: wheat, ‘Wanmai632’, drought stress, drought tolerance, drought tolerance index

ZHANG Bin, LI Jinxiu, WANG Zhen, SHI Lichao, LI Jinbang. Wheat Variety ‘Wanmai632’: Tolerance Under Drought Stress[J]. Chinese Agricultural Science Bulletin, 2022, 38(36): 12-16.

Figures/Tables 5

References 25

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名称	宛麦632		周麦18
名称	干旱胁迫	正常处理	干旱胁迫	正常处理
苗高/cm	10.1±0.46 b	14.0±0.38 a	6.2±0.31 c	14.5±0.57 a
根长/cm	7.3±0.26 b	11.0±0.51 a	4.7±0.40 c	10.8±0.50 a
茎叶鲜重/(g/10株)	2.2±0.15 b	2.9±0.10 a	1.2±0.12 c	2.8±0.20 a
根鲜重/(g/10株)	1.6±0.35 b	2.3±0.30 a	1.0±0.25 c	2.1±0.32 a

名称	宛麦632		周麦18
名称	干旱胁迫	正常处理	干旱胁迫	正常处理
苗高/cm	10.1±0.46 b	14.0±0.38 a	6.2±0.31 c	14.5±0.57 a
根长/cm	7.3±0.26 b	11.0±0.51 a	4.7±0.40 c	10.8±0.50 a
茎叶鲜重/(g/10株)	2.2±0.15 b	2.9±0.10 a	1.2±0.12 c	2.8±0.20 a
根鲜重/(g/10株)	1.6±0.35 b	2.3±0.30 a	1.0±0.25 c	2.1±0.32 a

产量性状	宛麦632		周麦18
产量性状	干旱区	灌水区	干旱区	灌水区
株高/cm	75.8±0.60 b	81.6±1.13 a	73.6±1.20 c	82.7±0.70 a
最高分蘖/(万/hm²)	1417±33.05 b	1614±35.70 a	1390±35.25 b	1587±47.27 a
有效穗/(万/hm²)	492±12.82 a	515±20.25 a	485±12.76 a	500±18.51 a
穗粒数/粒	31.2±1.90 b	36.8±1.49 a	27.2±1.26 c	37.3±1.21 a
千粒重/g	41.7±0.69 b	47.4±0.65 a	37.7±0.65 c	47.0±0.45 a
产量/(kg/hm²)	6521±242.90 b	7052±116.41 a	6106±200.46 c	6916±147.10 a

产量性状	宛麦632		周麦18
产量性状	干旱区	灌水区	干旱区	灌水区
株高/cm	75.8±0.60 b	81.6±1.13 a	73.6±1.20 c	82.7±0.70 a
最高分蘖/(万/hm²)	1417±33.05 b	1614±35.70 a	1390±35.25 b	1587±47.27 a
有效穗/(万/hm²)	492±12.82 a	515±20.25 a	485±12.76 a	500±18.51 a
穗粒数/粒	31.2±1.90 b	36.8±1.49 a	27.2±1.26 c	37.3±1.21 a
千粒重/g	41.7±0.69 b	47.4±0.65 a	37.7±0.65 c	47.0±0.45 a
产量/(kg/hm²)	6521±242.90 b	7052±116.41 a	6106±200.46 c	6916±147.10 a

名称	抗旱指数
名称	宛麦632	周麦18
发芽率	0.904	0.426
发芽势	0.794	0.218
苗高	0.894	0.325
根长	0.807	0.341
茎叶鲜重	0.982	0.303
根鲜重	0.856	0.366
株高	0.943	0.877
最高分蘖	0.886	0.867
有效穗	0.962	0.963
穗粒数	0.906	0.679
千粒重	0.924	0.762
产量	0.955	0.854
综合抗旱指数	0.901	0.582