Crops ›› 2017, Vol. 33 ›› Issue (4): 72-77.doi: 10.16035/j.issn.1001-7283.2017.04.013

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Screening of Drought Resistant Germplasm Resources in Potato

,Zhang Lili,Shi Ying   

  1. College of Agriculture,Northeast Agricultural University,Harbin 150030,Heilongjiang,China
  • Received:2017-03-27 Revised:2017-06-19 Online:2017-08-15 Published:2018-08-26
  • Contact: Ying Shi

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Abstract:

Drought is becoming more and more serious to the agricultural production, and the drought resistant variety is one of the effective methods to deal with the drought in northeast region of China. In this experiment, field grown potato clones in two generation population of 210 as the materials, in vitro drought stress leaf material screening by 20% PEG-6000 solution, the physiological indexes of drought resistance evaluation, combined with the comprehensive analysis of yield traits were studied. We preliminary screened 90 materials, and obtained 14 materials with better performance in MDA content, conductivity, and relative water content through physiological indexes evaluation. Six high quality drought-resistance potato materials were recommended through the comprehensive evaluation using correlation analysis, physiological indexes yield traits evaluation and the main components analysis. This study provided a rapid and effective method for screening and evaluation for drought resistance potato germplasm resources.

Key words: Potato, Drought-resistance germplasm resource, Physiological index, Yield, Comprehensive evaluation

Fig.1

Different wilting degree of population materials after PEG-6000 stress"

Fig.2

Distribution of variation of physiological indexes From left to right is ZD1-41, DD1-21, ND1-28"

Table 1

Variation of physiological indexes and indexes relative to yield of potato"

材料
Material		 指标变化量Variation of index 产量相关指标Index relative to yield
MDA含量(μmol/g)
MDA content		 相对含水量(%)
Relative water content		 电导率(S/m)
Conductivity		 单株结薯数
Tuber number per plant		 单株产量(g)
Tuber yield per plant		 商品薯率(%)
Marketable tuber rate
ZD9 1.13 0.0199 60.27 9 600.0 67.60
ZD13 3.75 0.0807 37.00 10 826.7 69.90
ZD29 3.63 0.0824 29.70 7 939.3 87.00
ZD33 3.00 0.0785 14.97 7 991.0 87.00
ZD36 2.88 0.0720 31.93 11 630.0 73.33
DD6 2.95 0.1145 28.10 9 1 078.0 89.40
ND1 1.79 0.0143 29.73 4 375.0 40.00
ND2 2.72 0.0128 69.67 9 1 220.0 85.30
ND12 4.87 0.0511 8.20 8 890.0 77.15
ND15 5.57 0.0271 59.90 10 1 045.0 73.21
ND20 5.94 0.0102 72.93 7 701.0 72.04
ND22 1.44 0.0346 31.50 8 793.3 66.40
ND23 1.13 0.0491 11.53 13 1 456.7 82.60
ND25 1.15 0.0131 13.77 5 572.5 65.28

Table 2

Correlation analysis matrix of potato index"

指标Index MDA含量
变化量		 相对含水量
变化量		 电导率
变化量		 单株
结薯数		 单株
产量		 商品
薯率
MDA含量变化量Variation of MDA content 1
相对含水量变化量Variation of relative water content 0.26 1
电导率变化量Variation of conductivity 0.56* -0.11 1
单株结薯数Tuber number per plant 0.00 0.26 0.16 1
单株产量Tuber yield per plant 0.07 0.29 0.08 0.65** 1
商品薯率Marketable tuber rate 0.26 0.61** 0.03 0.47 0.76** 1

Table 3

Potato characteristic vector"

指标Index F1 F2 F3 F4 F5 F6
MDA含量变化量Variation of MDA content 0.21 0.67 -0.31 -0.13 -0.63 0.07
相对含水量变化量Variation of relative water content 0.40 -0.09 -0.65 0.48 0.29 0.30
电导率变化量Variation of conductivity 0.13 0.70 0.34 0.14 0.60 -0.01
单株结薯数Tuber number per plant 0.45 -0.13 0.49 0.61 -0.37 -0.19
单株产量Tuber yield per plant 0.52 -0.16 0.31 -0.45 0.02 0.63
商品薯率Marketable tuber rate 0.56 -0.10 -0.17 -0.39 0.18 -0.68

Table 4

Eigenvalue and cumulative contribution rate of potato"

主成分
Principle component		 特征值
Eigenvalue		 贡献率(%)
Percentage		 累计贡献率(%)
Cumulative percentage
F1 2.63 43.86 43.86
F2 1.49 24.92 68.78
F3 1.01 16.83 85.61
F4 0.46 7.68 93.29
F5 0.27 4.55 97.85
F6 0.13 2.15 100.00

Table 5

Scores of main components of different materials"

材料
Material		 主成分1
Principal
component 1		 主成分2
Principal
component 2		 主成分3
Principal
component 3
ZD9 -1.35 -0.26 1.03
ZD13 0.28 -0.06 -0.19
ZD29 0.63 0.27 -1.06
ZD33 0.57 0.81 -0.96
ZD36 0.04 -0.43 0.01
DD6 1.68 -0.86 -0.90
ND1 -4.20 0.09 -0.29
ND2 0.86 0.02 1.45
ND12 0.05 -0.08 -0.64
ND15 0.96 2.91 1.73
ND20 -0.84 1.86 0.07
ND22 1.14 -0.77 0.49
ND23 2.04 -2.13 1.83
ND25 -2.58 -0.83 -0.20
东农311
Dongnong 311		 1.58
 -0.44
 -0.89
定薯1号
Dingshu No.1		 1.42
 2.07
 -1.49
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