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作物学报 ›› 2018, Vol. 44 ›› Issue (8): 1237-1247.doi: 10.3724/SP.J.1006.2018.01237

• 耕作栽培·生理生化 • 上一篇    下一篇

甘薯苗期耐盐性鉴定及其指标筛选

段文学1,*,**(),张海燕1,**(),解备涛1,汪宝卿1,张立明2,*()   

  1. 1 山东省农业科学院作物研究所 / 农业部黄淮海薯类科学观测实验站, 山东济南 250100
    2 山东省农业科学院, 山东济南 250100
  • 收稿日期:2017-11-20 接受日期:2018-03-26 出版日期:2018-08-10 网络出版日期:2018-04-20
  • 通讯作者: 段文学,张海燕,张立明
  • 基金资助:
    山东省重点研发计划项目(2016ZDJS10A03);国家自然科学基金项目(31501261);山东省重大科技专项(2015ZDJS03001);山东省薯类产业创新团队(SDAIT-16-09);国家现代农业产业技术体系专项(CARS-10-B08)

Identification of Salt Tolerance and Screening for Its Indicators in Sweet Potato Varieties during Seedling Stage

Wen-Xue DUAN1,*,**(),Hai-Yan ZHANG1,**(),Bei-Tao XIE1,Bao-Qing WANG1,Li-Ming ZHANG2,*()   

  1. 1 Crop Research Institute, Shandong Academy of Agricultural Sciences / Scientific Observation and Experimental Station of Tuber and Root Crops in Huang-Huai-Hai Region, Ministry of Agriculture, Jinan 250100, Shandong, China
    2 Shandong Academy of Agricultural Sciences, Jinan 250100, Shandong, China
  • Received:2017-11-20 Accepted:2018-03-26 Published:2018-08-10 Published online:2018-04-20
  • Contact: Wen-Xue DUAN,Hai-Yan ZHANG,Li-Ming ZHANG
  • Supported by:
    This study was supported by the Key Research and Development Project of Shandong Province(2016ZDJS10A03);the National Natural Science Foundation of China(31501261);the Major Science and Technology Projects of Shandong Province(2015ZDJS03001);the Modern Agricultural Technology System of Tubers and Root Crops in Shandong Province(SDAIT-16-09);the China Agriculture Research System(CARS-10-B08)

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摘要：

以18个甘薯品种(系)为试验材料, 设置对照和200 mmol L -1 NaCl浓度处理, 通过苗期盐土栽培胁迫方式, 对各处理下各品种(系)的茎叶鲜重、根系鲜重、茎叶干重、根系干重、叶片相对电导率、Fv/Fm、SPAD值、SOD酶活性、MDA含量、脯氨酸含量、根系活力、根系Na +和K +含量、Na +/K +比值等14个生理指标进行测定, 通过对各单项指标的耐盐系数进行相关分析、主成分分析、聚类分析和逐步回归等方法对品种(系)耐盐性进行综合评价。通过主成分分析, 将盐胁迫处理下甘薯苗期的14个单项指标转换成5个彼此独立的综合指标; 通过隶属函数分析, 得到不同品种(系)苗期耐盐性综合评价值(D值), 并通过聚类分析, 将18个甘薯品种(系)划分为4种耐盐类型, 其中盐敏感型4个、弱耐盐型3个、中度耐盐型7个和高度耐盐型4个。在此基础上, 利用逐步回归方法建立了可用于甘薯苗期耐盐性评价的回归方程, 同时筛选出茎叶鲜重、根系鲜重、茎叶干重、叶片SPAD值、SOD酶活性、MDA含量、脯氨酸含量、根系Na +/K +比值等8个可用于甘薯苗期耐盐性评价的生理指标。本研究可为甘薯耐盐新品种选育提供种质并为甘薯苗期耐盐性评价及耐盐机制研究提供理论依据。

关键词: 甘薯, 苗期, 耐盐性, 综合评价, 鉴定指标

Abstract:

Eighteen sweet potato varieties were selected as the test material. The control and treatment groups were established via saline soil cultivation in seedling stage. The treatment group received 200 mmol L -1 NaCl. Fourteen physical traits were observed in each treatment, which were fresh stem leaf weight, fresh root weight, dry stem leaf weight, dry root weight, relative leaf conductivity, Fv/Fm, SPAD value, superoxide dismutase (SOD) activity, malondialdehyde (MDA) content, proline content, root vigor, root Na + content, root K +content, and Na +/K + ratio. A comprehensive analysis of the salt tolerance of different varieties was conducted via correlation analysis, principal component analysis, clustering analysis, and stepwise regression of the salt tolerance efficiency of each index. Principal component analysis narrowed down the 14 single indexes in the salt-stressed seedling stage of sweet potatoes to five independent comprehensive indexes. Subordinate function analysis was conducted to obtain the comprehensive assessment value (D-value) of salt tolerance of different varieties in seedling stage. In clustering analysis, the 18 sweet potato varieties were divided into four salt tolerance types, including four salt-sensitive, three weak salt tolerant, seven moderate salt-tolerant, and four high salt-tolerant. On the basis of this division, stepwise regression method was used to establish a regression equation for salt tolerance assessment of sweet potatoes in seedling stage. Eight physiological indexes were selected (fresh stem leaf weight, fresh root weight, dry stem leaf weight, leaf SPAD value, SOD enzyme activity, MDA content, proline content, and Na +/K + ratio) for the same assessment purpose. This paper presents the germplasm information for selection and breeding of new salt-tolerant sweet potato varieties. The results could serve as a basis for subsequent assessment of seedling stage salt tolerance of sweet potatoes and further studies on their salt tolerance mechanism.

Key words: sweet potato, seedling stage, salt tolerant, comprehensive assessment, identified index

表1

盐胁迫条件下甘薯苗期叶片和根系各单项生理指标的耐盐系数"

表2

盐胁迫条件下甘薯幼苗叶片各单项生理指标的相关系数矩阵"

表3

各综合指标特征根、贡献率和特征向量"

项目 Item CI1 CI2 CI3 CI4 CI5
特征根 Eigen value 8.6185 1.2008 1.1091 1.0367 0.5274
贡献率 Contribution ratio 61.5606 8.5772 7.9219 7.4050 3.7674
累计贡献率 Cumulative contribution ratio 61.5606 70.1377 78.0597 85.4647 89.2321
特征向量 Eigen vector X1 0.3147 0.0425 -0.1932 0.1368 0.1386
X2 0.3092 0.1377 0.1058 -0.0449 0.1869
X3 0.3095 0.0180 -0.1334 0.0591 -0.0586
X4 0.2819 0.0376 0.1084 -0.4418 0.0333
X5 0.2477 0.1128 -0.2463 -0.3718 0.6375
X6 0.2756 -0.2629 0.3830 -0.1045 -0.0300
X7 -0.2737 -0.1865 0.2135 -0.2465 0.4086
X8 0.1871 -0.5779 -0.1393 0.4066 0.2228
X9 0.2646 0.3335 0.2197 -0.1753 -0.3389
X10 -0.2837 0.1796 0.2257 0.0216 0.0700
X11 -0.3230 -0.0103 0.0359 0.0757 0.1798
X12 0.1844 -0.1598 0.7166 0.1962 0.1313
X13 -0.2591 0.2681 0.1778 -0.0038 0.2789
X14 0.1642 0.5347 0.0620 0.5744 0.2652

表4

各品种(系)的综合指标值、权重、D值及综合评价"

图1

18个甘薯品种(系)聚类树状图"

表5

回归方程的精度分析"

品种(系)
Variety (line)		 回归值
Regression value		 原始值
Primary value		 差值
Difference		 估计精度
Evaluation accuracy (%)
08365 0.240 0.229 -0.011 95.35
09049 0.759 0.758 -0.001 99.90
09110 0.611 0.613 0.002 99.70
11025 0.295 0.282 -0.013 95.57
12092 0.203 0.207 0.003 98.37
12109 0.621 0.612 -0.009 98.59
12148 0.164 0.157 -0.007 95.65
12156 0.488 0.484 -0.003 99.29
12211 0.445 0.447 0.002 99.62
12231 0.577 0.571 -0.006 98.89
13055 0.664 0.668 0.004 99.45
紫罗兰 Ziluolan 0.396 0.379 -0.017 95.81
烟薯25 Yanshu 25 0.544 0.534 -0.010 98.19
济薯18 Jishu 18 0.518 0.526 0.008 98.50
济薯21 Jishu 21 0.764 0.769 0.005 99.36
济徐23 Jixu 23 0.804 0.778 -0.026 96.78
济薯25 Jishu 25 0.598 0.604 0.006 99.07
济薯26 Jishu 26 0.838 0.857 0.019 97.81
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