中国农业科学 ›› 2020, Vol. 53 ›› Issue (1): 42-54.doi: 10.3864/j.issn.0578-1752.2020.01.004
丁启朔1,李海康1,孙克润2,何瑞银1,汪小旵1,刘富玺1,厉翔1
收稿日期:
2019-04-30
接受日期:
2019-05-20
出版日期:
2020-01-01
发布日期:
2020-01-19
作者简介:
丁启朔,E-mail:qsding@njau.edu.cn
基金资助:
QiShuo DING1,HaiKang LI1,KeRun SUN2,RuiYin HE1,XiaoChan WANG1,FuXi LIU1,Xiang LI1
Received:
2019-04-30
Accepted:
2019-05-20
Online:
2020-01-01
Published:
2020-01-19
摘要:
【目的】高通量表型技术不仅是现代育种领域的重要手段,也是解析田间作物生理生态行为的工具,但不同类别高通量表型技术的基础架构特征仍不清楚,因此需要针对机器视觉高通量表型技术进行专门探讨。【方法】本文用机器视觉技术检测计算稻茬麦茎穗一体的表型指标。使用宁麦13、鲁原502和郑麦9023 3个小麦品种,进行小区化对比试验,使用等孔距栅条精播板进行单粒精播,准确控制条播小麦的群体条件。于稻茬麦成熟期进行茎穗一体图像获取,对图像进行灰度增强、直方图均值化、S分量提取、Otsu阈值分割、茎穗分离和茎穗形态参数提取等操作。提取的稻茬麦地上部单茎穗各器官的形态参数包括茎秆长、茎秆平均宽度、茎秆投影面积、茎秆周长、麦穗长、麦穗平均宽度、麦穗投影面积和麦穗周长。同时,使用传统方法获取小麦单叶片质量、单茎秆质量、单穗质量和单穗籽粒产量等农艺性状指标。分别构建线性模型、二次模型、指数模型及拓展模型进行多维指标拟合,包括小麦单茎穗生物量与单穗籽粒产量关系、单茎穗的麦穗形态参数与单穗籽粒产量关系等拟合分析。在单茎穗层面对小麦茎穗的表型指标与单穗籽粒产量之间的关系进行相关分析和回归分析,进而基于机器视觉在小麦茎穗一体方面的个例应用,讨论大田高通量表型分析的机器视觉技术研发的要点。【结果】宁麦13、鲁原502和郑麦9023 3个小麦品种的单叶片质量与单穗籽粒产量的相关系数依次下降,小麦单茎穗形态参数与单穗籽粒产量的相关性显著低于生物量指标,但单穗投影面积、单穗长与单穗籽粒产量依然存在显著正相关。3个小麦品种在单茎穗的各生物量指标与单穗籽粒产量的最优回归模型各不相同,麦穗图像的形态参数不能准确反映单穗籽粒产量,但单茎穗的茎秆和麦穗形态参数的组合应用表现出最佳的拓展模型拟合结果。利用茎穗一体的数字图像处理所得的复合型形态参数可以准确预测单穗籽粒产量,从而表明利用机器视觉技术观测小麦的生长过程并实时预测产量的可行性。【结论】机器视觉技术能提供远高于常规农艺性状的高通量指标集,为解析各类农艺性状之间的联系及产量的通径分析提供更多的途径,但也造成高维指标集和有价值信息提取的技术困难。应用于田间小麦群体的机器视觉技术应具备多尺度智能化自适应的技术架构,同时应具备基于场景、群体、个体和器官的多空间尺度和苗期、分蘖期、拔节期等多生理时间尺度的统计性数字表型发现和计算能力,同时,机器视觉各技术研发环节和各技术模块都需要农艺学深度参与和校准,而配备标准表型数据库更是保障高通量技术实用性和可靠性的基础。
丁启朔,李海康,孙克润,何瑞银,汪小旵,刘富玺,厉翔. 基于机器视觉的稻茬麦单茎穗高通量表型分析[J]. 中国农业科学, 2020, 53(1): 42-54.
QiShuo DING,HaiKang LI,KeRun SUN,RuiYin HE,XiaoChan WANG,FuXi LIU,Xiang LI. High-Throughput Phenotyping of Individual Wheat Stem and Ear Traits with Machine Vision[J]. Scientia Agricultura Sinica, 2020, 53(1): 42-54.
表1
小麦单茎穗地上部生物量与单穗籽粒产量回归模型"
拟合模型 Fitting model | 模型类型 Model type | 模型方程 Model equation |
---|---|---|
单穗质量与单穗籽粒产量 Ear-derived weight and grain yield | 线性Linear | SEY=a0+a1×SEW |
二次Quadratic | SEY=a0+a1×SEW2 | |
指数Exponential | ln(SEY)=a0+a1×ln(SEW)2 | |
地上部各器官生物量与单穗 籽粒产量 Biomass of different organs and ear-derived grain yield | 线性Linear | SEY=a0+a1×SLW+a2×SSW+a3×SEW |
二次Quadratic | SEY=a0+a1×SLW2+a2×SSW2+a3×SEW2 | |
拓展Extended | SEY=a0+a1×SLW2+a2×SSW2+a3×SEW2+a4×SLW×SSW+a5×SLW×SEW+a6×SSW×SEW | |
指数Exponential | ln(SEY)=a0+a1×ln(SLW)2+a2×ln(SSW)2+a3×ln(SEW)2 |
表2
小麦单茎穗茎秆和麦穗形态参数与单穗籽粒产量回归模型"
拟合模型 Fitting model | 模型类型 Model type | 模型方程 Model equation |
---|---|---|
麦穗形态参数与单穗籽粒产量 Ear morphological parameters and ear-derived grain yield | 线性Linear | SEY=a0+a1×SEL+a2×SEAW+a3×SEA+a4×SEC |
二次Quadratic | SEY=a0+a1×SEL2+a2×SEAW2+a3×SEA2+a4×SEC2 | |
拓展Extended | SEY=a0+a1×SEL2+a2×SEAW2+a3×SEA2+a4×SEC2+a5×SEL×SEAW+a6×SEL×SEA+a7×SEL×SEC+... | |
指数Exponential | ln(SEY)=a0+a1×ln(SEL)2+a2×ln(SEAW)2+a3×ln(SEA)2+a4×ln(SEC)2 | |
茎秆和麦穗形态参数与单穗籽粒产量 Stem and ear morphological parameters and ear-derived grain yield | 线性Linear | SEY=a0+a1×SEL+a2×SEAW+a3×SEA+a4×SEC+a5×SSL+a6×SSAW+a7×SSA+a8×SSC |
二次Quadratic | SEY=a0+a1×SEL2+a2×SEAW2+a3×SEA2+a4×SEC2+a5×SSL2+a6×SSAW2+a7×SSA2+a8×SSC2 | |
拓展Extended | SEY=a0+a1×SEL2+a2×SEAW2+a3×SEA2+a4×SEC2+a5×SSL2+a6×SSAW2+a7×SSA2+a8×SSC2+a9× SEL×SEAW+... | |
指数Exponential | ln(SEY)=a0+a1×ln(SEL)2+a2×ln(SEAW)2+a3×ln(SEA)2+a4×ln(SEC)2+a5×ln(SSL)2+a6×ln(SSAW)2+a7× ln(SSA)2+a8×ln(SSC)2 |
表4
小麦单茎穗茎秆和麦穗形态参数与单穗籽粒产量的相关性"
品种 Variety | 单茎投影面积SSA (mm2) | 单茎周长 SSC (mm) | 单茎长 SSL (mm) | 单茎平均宽度SSAW (mm) | 单穗投影面积SEA (mm2) | 单穗周长 SEC (mm) | 单穗长 SEL (mm) | 单穗平均 宽度SEAW (mm) |
---|---|---|---|---|---|---|---|---|
宁麦13 Ningmai 13 | 0.090 | 0.058 | 0.116 | 0.112 | 0.505** | 0.478** | 0.496** | 0.336* |
鲁原502 Luyuan 502 | -0.052 | 0.133 | 0.173 | -0.186 | 0.554** | 0.396** | 0.649** | 0.209 |
郑麦9023 Zhengmai 9023 | 0.184 | 0.224 | 0.383** | 0.114 | 0.393** | 0.320* | 0.383** | 0.285* |
表5
小麦单穗穗重与单穗籽粒产量回归模型拟合结果"
品种 Variety | 模型 Model | 系数Coefficient | 决定系数 R2 | F值 F value | P值 P value | 误差方差估计 MSp | |
---|---|---|---|---|---|---|---|
a0 | a1 | ||||||
宁麦13 Ningmai 13 | 线性Linear | -0.061 | 0.783 | 0.902 | 443.105 | 0.000 | 0.009 |
二次Quadratic | 0.459 | 0.275 | 0.914 | 248.683 | 0.000 | 0.008 | |
指数Exponential | 3.183 | 0.071 | 0.882 | 357.326 | 0.000 | 0.010 | |
鲁原502 Luyuan 502 | 线性Linear | 0.002 | 0.673 | 0.859 | 293.457 | 0.000 | 0.023 |
二次Quadratic | 0.584 | 0.168 | 0.862 | 146.316 | 0.000 | 0.023 | |
指数Exponential | 3.186 | 0.069 | 0.670 | 97.358 | 0.000 | 0.060 | |
郑麦9023 Zhengmai 9023 | 线性Linear | -0.099 | 0.695 | 0.844 | 259.356 | 0.000 | 0.036 |
二次Quadratic | 0.454 | 0.191 | 0.858 | 290.450 | 0.000 | 0.033 | |
指数Exponential | 2.921 | 0.073 | 0.744 | 139.620 | 0.000 | 0.059 |
表6
小麦单茎穗茎秆重、叶重和穗重与单穗籽粒产量回归模型拟合结果"
品种 Variety | 模型 Model | 系数Coefficient | 决定系R2 | F值 F value | P值 P value | 误差方差估计 Error variance estimation | ||||
---|---|---|---|---|---|---|---|---|---|---|
a0 | a1 | a2 | a3 | … | ||||||
宁麦13 Ningmai 13 | 线性Linear | -0.065 | -0.046 | 0.120 | 0.778 | 0.903 | 141.909 | 0.000 | 0.009 | |
二次Quadratic | 0.452 | 0.137 | 0.038 | 0.263 | … | 0.918 | 80.005 | 0.000 | 0.008 | |
拓展Extended | 0.452 | 1.915 | -4.978 | 0.099 | … | 0.925 | 54.835 | 0.000 | 0.008 | |
指数Exponential | 3.182 | 0.002 | -0.003 | 0.072 | … | 0.885 | 117.718 | 0.000 | 0.011 | |
鲁原502 Luyuan 502 | 线性Linear | -0.045 | 0.049 | 0.092 | 0.654 | 0.861 | 94.656 | 0.000 | 0.024 | |
二次Quadratic | 0.511 | -0.243 | 0.361 | 0.159 | … | 0.840 | 80.046 | 0.000 | 0.027 | |
拓展Extended | 0.518 | -0.727 | -2.887 | 0.021 | … | 0.856 | 42.714 | 0.000 | 0.027 | |
指数Exponential | 2.924 | 0.011 | 0.004 | 0.064 | … | 0.681 | 2.788 | 0.000 | 0.061 | |
郑麦9023 Zhengmai 9023 | 线性Linear | 0.059 | -0.032 | -0.446 | 0.792 | 0.863 | 96.222 | 0.000 | 0.033 | |
二次Quadratic | 0.512 | -0.025 | -0.204 | 0.207 | … | 0.867 | 100.115 | 0.000 | 0.032 | |
拓展Extended | 0.502 | 2.883 | 1.752 | 0.169 | … | 0.872 | 48.618 | 0.000 | 0.033 | |
指数Exponential | 3.242 | 0.003 | -0.021 | 0.081 | … | 0.788 | 56.975 | 0.000 | 0.054 |
表7
小麦麦穗形态参数与单穗籽粒产量回归模型拟合结果"
品种 Variety | 模型 Model | 系数Coefficient | 决定系数R2 | F值 F value | P值 P value | 误差方差估计 Error variance estimation | ||||
---|---|---|---|---|---|---|---|---|---|---|
a0 | a1 | a2 | a3 | … | ||||||
宁麦13 Ningmai 13 | 线性Linear | -0.067 | 0.014 | 0.011 | 0.000 | … | 0.337 | 7.796 | 0.000 | 0.063 |
二次Quadratic | 0.566 | 0.000 | 0.000 | 0.000 | … | 0.340 | 3.695 | 0.005 | 0.067 | |
拓展Extended | 0.315 | -0.001 | -0.017 | 0.000 | … | 0.434 | 3.408 | 0.003 | 0.062 | |
指数Exponential | 4.788 | 0.165 | 0.109 | -0.023 | … | 0.281 | 5.979 | 0.002 | 0.069 | |
鲁原502 Luyuan 502 | 线性Linear | 0.080 | 0.016 | -0.021 | 0.000 | … | 0.447 | 12.399 | 0.000 | 0.096 |
二次Quadratic | 0.620 | 0.000 | -0.001 | 0.000 | … | 0.496 | 11.049 | 0.000 | 0.090 | |
拓展Extended | 0.468 | 0.000 | -0.013 | 0.000 | … | 0.618 | 6.298 | 0.000 | 0.078 | |
指数Exponential | 4.800 | 0.128 | -0.021 | 0.032 | … | 0.416 | 10.920 | 0.000 | 0.102 | |
郑麦9023 Zhengmai 9023 | 线性Linear | 1.892 | 0.006 | -0.152 | 0.003 | … | 0.235 | 4.107 | 0.012 | 0.201 |
二次Quadratic | 0.713 | 0.000 | -0.001 | 0.000 | … | 0.243 | 3.131 | 0.025 | 0.204 | |
拓展Extended | 3.413 | 0.005 | -0.023 | 0.000 | … | 0.413 | 2.322 | 0.034 | 0.187 | |
指数Exponential | 5.160 | 0.259 | -0.016 | 0.034 | … | 0.283 | 3.850 | 0.009 | 0.193 |
表8
小麦茎秆和麦穗形态参数与单穗籽粒产量回归模型拟合结果"
品种 Variety | 模型 Model | 系数Coefficient | 决定系数R2 | F值 F value | P值 P value | 误差方差估计 Error variance estimation | ||||
---|---|---|---|---|---|---|---|---|---|---|
a0 | a1 | a2 | a3 | … | ||||||
宁麦13 | 线性Linear | -1.080 | 0.023 | 0.016 | 0.000 | … | 0.344 | 3.757 | 0.004 | 0.067 |
Mingmai 13 | 二次Quadratic | 0.065 | 0.000 | 0.000 | 0.000 | … | 0.421 | 2.240 | 0.030 | 0.069 |
拓展Extended | 0.862 | 0.000 | -0.098 | 0.000 | … | 0.829 | 1.468 | 0.181 | 0.071 | |
指数Exponential | 3.113 | -0.011 | 0.091 | 0.029 | … | 0.328 | 3.492 | 0.007 | 0.069 | |
鲁原502 Luyuan 502 | 线性Linear | -0.815 | 0.015 | -0.018 | 0.000 | … | 0.612 | 8.075 | 0.000 | 0.076 |
二次Quadratic | 0.140 | 0.000 | 0.000 | 0.000 | … | 0.617 | 8.271 | 0.000 | 0.075 | |
拓展Extended | 0.299 | -0.005 | 0.066 | 0.000 | … | 0.935 | 6.669 | 0.000 | 0.040 | |
指数Exponential | -0.090 | 0.142 | 0.028 | 0.033 | … | 0.544 | 8.565 | 0.000 | 0.085 | |
郑麦9023 Zhengmai 9023 | 线性Linear | -1.253 | 0.010 | 0.085 | 0.002 | … | 0.303 | 2.678 | 0.029 | 0.198 |
二次Quadratic | -0.228 | 0.000 | 0.000 | 0.000 | … | 0.296 | 1.836 | 0.103 | 0.212 | |
拓展Extended | 34.07 | 0.030 | -0.838 | 0.000 | … | 0.897 | 1.686 | 0.243 | 0.155 | |
指数Exponential | 0.812 | 0.314 | 0.185 | -0.043 | … | 0.410 | 3.003 | 0.011 | 0.177 |
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