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Yu, Neil; Li, Liujun; Schmitz, Nathan; Tian, Lei F.; Greenberg, Jonathan A.; Diers, Brian W.
Remote sensing of environment, 12/2016, Volume: 187Journal Article
Advances in phenotyping technology are critical to ensure the genetic improvement of crops meet future global demands for food and fuel. Field-based phenotyping platforms are being evaluated for their ability to deliver the necessary throughput for large scale experiments and to provide an accurate depiction of trait performance in real-world environments. We developed a dual-camera high throughput phenotyping (HTP) platform on an unmanned aerial vehicle (UAV) and collected time course multispectral images for large scale soybean Glycine max (L.) Merr. breeding trials. We used a supervised machine learning model (Random Forest) to measure crop geometric features and obtained high correlations with final yield in breeding populations (r=0.82). The traditional yield estimation model was significantly improved by incorporating plot row length as covariate (p<0.01). We developed a binary prediction model from time-course multispectral HTP image data and achieved over 93% accuracy in classifying soybean maturity. This prediction model was validated in an independent breeding trial with a different plot type. These results show that multispectral data collected from the UAV-based HTP platform could improve yield estimation accuracy and maturity recording efficiency in a modern soybean breeding program. •A budget friendly airborne high throughput phenotyping platform was developed.•Canopy geometric features measured at plot-level highly correlated with yield.•Plot row length assessed from image improved yield estimation accuracy.•Time course multispectral data predicted soybean plot maturity with high accuracy.•The UAV-based high throughput phenotyping platform improved breeding efficiency.
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