Crops ›› 2019, Vol. 35 ›› Issue (5): 41-45.doi: 10.16035/j.issn.1001-7283.2019.05.007

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Identification of Drought Resistance of Different Soybean Materials and Screening of Drought Tolerant Varieties

Zhang Yongfang,Qian Xiaona,Wang Runmei,Shi Pengqing,Yang Rong   

  1. School of Life Science, Shanxi Datong University, Datong 037009, Shanxi, China
  • Received:2019-06-17 Revised:2019-08-19 Online:2019-10-15 Published:2019-11-07
  • Contact: Runmei Wang

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Abstract:

Excavation, innovation, screening of soybean germplasm with excellent comprehensive traits and drought-resistance potential is of great significance for the selection of soybeans and meeting the needs of the market. Changes in physiological and biochemical indexes (chlorophyll content, superoxide enzyme activity, peroxidase activity) and evaluation of agronomic traits related to plant yield at maturity were studied under natural drought stress and normal irrigation treatment using 10 soybean varieties to screen out excellent drought-tolerant soybean varieties suitable for planting in the arid regions of northern Shanxi. The results showed that the normal growth and development of soybean under natural drought stress was seriously affected compared with the normal irrigation treatment. The chlorophyll loss rate was 9.70%-44.93% in the drought stress group compared with the normal irrigation group. While the superoxide dismutase activity increased by 0.98%-68.10%, and the peroxidase activity increased by 1.66%-58.72%. Compared with the drought-tolerant variety Jindou 21, the drought-resistances of Suinong 4, Suinong 14 and Hefeng 56 were stronger.

Key words: Soybean, Seedling stage, Drought resistance, Identification, Screening

Fig.1

The effects of drought stress on chlorophyll a content in soybean leaves Different small letters indicate significant difference at 0.05 level. The same below"

Fig.2

The effects of drought stress on chlorophyll b content in soybean leaves"

Table 1

Variation range of physiological and biochemical indexes of tested materials under drought stress %"

品种
Variety		 叶绿素损失率
Loss rate of
chlorophyll		 SOD活性增长率
Growth rate
of SOD activity		 POD活性增长率
Growth rate
of POD activity
晋豆21 Jindou 21 10.52 52.62 54.23
早熟1号Zaoshu 1 26.06 30.49 27.19
中品661 Zhongpin 661 36.72 21.10 1.66
黑农57 Heinong 57 44.93 0.98 2.00
黑农69 Heinong 69 44.18 22.81 8.86
绥农4 Suinong 4 11.12 56.29 57.76
绥农14 Suinong 14 9.70 58.80 55.31
垦农21 Kennong 21 15.75 40.85 2.37
合丰56 Hefeng 56 12.49 68.10 58.72
Jack 36.12 26.01 10.55
Willams 82 26.84 18.11 23.62

Table 2

Comparison of 4 agronomic traits of 11 soybean germplasm resources"

指标
Index		 最大值Max 最小值Mix 极差Range 均值Average 标准差Standard deviation 变异系数CV (%)
正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress		 正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress		 正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress		 正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress		 正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress		 正常灌水
Normal irrigation		 自然干旱胁迫
Natural drought
stress
株高(cm)
Plant height		 140.00 109.00 35.00 26.00 105.00 83.00 62.68 45.01 25.74 20.79 41.06 46.19
主茎节数
Nodes of main stem		 20.00 16.00 4.00 5.00 16.00 11.00 9.84 8.63 3.25 2.84 33.05 32.91
单株荚数
Pods per plant		 27.00 25.00 6.00 7.00 21.00 18.00 14.08 12.06 4.89 4.52 34.70 37.51
单株粒数
Seeds per plant		 73.00 69.00 20.00 16.00 53.00 53.00 37.28 30.03 11.59 11.90 31.09 39.62
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