Abstract
ABSTRACT Worldwide, improving grain yield is the most important target for wheat ( Triticum aestivum L.) breeders. Fast, cost‐effective, and nondestructive phenotyping methods for important traits are needed to increase the efficiency of cultivar development. The present study tested canopy spectral reflectance (CSR) as a potential high‐throughput method for assessing wheat grain yield in a diverse set of 540 spring‐habit accessions from the USDA–ARS National Small Grains Collection. Plots were grown under irrigated (IR) and terminal drought (DR) treatments over two growing seasons, and CSR was measured at several growth stages in each year. The CSR indices related to canopy water and N status, biomass, and photosynthetic area were evaluated for their relation to grain yield. The CSR indices were significantly correlated with yield at every growth stage, with anthesis and grain filling being the most useful for predicting grain yield in IR and DR environments. Single CSR indices selected up to 57% of the highest 25% yielding lines in DR conditions and the grain yield of accessions selected using CSR was 20% greater than randomly selected genotypes. Canopy spectral reflectance also identified up to 86% of the highest 10% yielding accessions. Canopy spectral reflectance may be valuable as a high‐throughput means of selecting for yield in large trials of genetically diverse wheat genotypes.
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Claims 5
Claim · model-written summary
Reflectance indices correlated significantly with yield at every growth stage.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- every growth stagee0
- Outcome
- yielde0
- Qualifier
- significantly correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The CSR indices were significantly correlated with yield at every growth stage”
t0“Spring Wheat”
Claim · model-written summary
Anthesis and grain filling were the most useful stages for predicting yield in irrigated and drought environments.
- Taxon
- WheatTriticum aestivumt0
- Organ / stage
- anthesis and grain fillinge0
- Outcome
- predicting grain yielde0
- Direction
- most usefule0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“anthesis and grain filling being the most useful for predicting grain yield in IR and DR environments”
t0“Wheat”
Claim · model-written summary
Single reflectance indices selected up to 57% of the top-yielding quarter under drought.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- highest 25% yielding linese0
- Value
- up to 57%e0
- Setting
- DR conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single CSR indices selected up to 57% of the highest 25% yielding lines in DR conditions”
t0“Wheat”
Claim · model-written summary
Reflectance-selected accessions yielded 20% more than randomly selected genotypes.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- grain yielde0
- Direction
- greatere0
- Value
- 20%e0
- Comparator
- randomly selected genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the grain yield of accessions selected using CSR was 20% greater than randomly selected genotypes.”
t0“Wheat”
Claim · model-written summary
Reflectance identified up to 86% of the highest-yielding decile of accessions.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- highest 10% yielding accessionse0
- Value
- up to 86%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Canopy spectral reflectance also identified up to 86% of the highest 10% yielding accessions.”
t0“Wheat”