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Title: High–throughput measurement of plant fitness traits with an object detection method using Faster R–CNN

Journal Article · · New Phytologist
DOI: https://doi.org/10.1111/nph.18056 · OSTI ID:1876374
ORCiD logo [1]; ORCiD logo [2];  [2];  [2]; ORCiD logo [3];  [2]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [2]; ORCiD logo [2]
  1. Michigan State Univ., East Lansing, MI (United States); Michigan State University Department of Plant Biology
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States)
  4. Michigan State Univ., East Lansing, MI (United States); Michigan State Univ., Hickory Corners, MI (United States)
  5. Univ. of Wisconsin, Madison, WI (United States)

Revealing the contributions of genes to plant phenotype is frequently challenging because loss-of-function effects may be subtle or masked by varying degrees of genetic redundancy. Such effects can potentially be detected by measuring plant fitness, which reflects the cumulative effects of genetic changes over the lifetime of a plant. However, fitness is challenging to measure accurately, particularly in species with high fecundity and relatively small propagule sizes such as Arabidopsis thaliana. An image segmentation-based method using the software ImageJ and an object detection-based method using the Faster Region-based Convolutional Neural Network (R-CNN) algorithm were used for measuring two Arabidopsis fitness traits: seed and fruit counts. The segmentation-based method was error-prone (correlation between true and predicted seed counts, r2 = 0.849) because seeds touching each other were undercounted. By contrast, the object detection-based algorithm yielded near perfect seed counts (r2 = 0.9996) and highly accurate fruit counts (r2 = 0.980). Comparing seed counts for wild-type and 12 mutant lines revealed fitness effects for three genes; fruit counts revealed the same effects for two genes. Our study provides analysis pipelines and models to facilitate the investigation of Arabidopsis fitness traits and demonstrates the importance of examining fitness traits when studying gene functions.

Research Organization:
Michigan State Univ., East Lansing, MI (United States). Great Lakes Bioenergy Research Center
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
SC0018409
OSTI ID:
1876374
Journal Information:
New Phytologist, Journal Name: New Phytologist Journal Issue: 4 Vol. 234; ISSN 0028-646X
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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