Scientists used camera-equipped drones to measure how cassava plants grow in Nigerian fields over two years, finding that canopy height and volume reliably reflect genetic differences between varieties — making drones a practical tool to speed up cassava breeding.
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Canopy height and volume showed moderate-to-high heritability (H² = 0.58 and 0.64), meaning genetics strongly controls final plant size — making these traits useful for selecting superior varieties.
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Repeatability was high for all UAV-derived traits (R = 0.68–0.69), confirming that drone measurements are reliable and consistent across seasons and plot replicates.
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Relative growth rates had near-zero heritability, indicating they are driven mainly by environmental conditions rather than genetics — useful for studying stress response but not for variety selection.
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