AI Summary & Key Takeaways
AI InsightConsidering the higher proportion of lines advanced by NDVI+ and Breeder & NDVI+ protocols, and the correlation between mean NDVI and grain yield at the HR and PYT stages, revealed that NDVI can improve selection efficiency.
📌 3 Key Takeaways
Abstract
Visual selection in early stage of wheat breeding is usually implemented method. This study was conducted to compare breeders’ visual selection with normalized difference vegetation index (NDVI) selection. Three different selection protocols were used at Head Rows (HR) stage: Breeder visual, NDVI+ (high mean NDVI), and NDVI- (low mean NDVI). Some HRs were selected by both Breeder and NDVI+ (Breeder & NDVI+). Performances of HRs selected by each protocol were studied for grain yield and relationship of NDVI with yield in yield trials. 403 HRs of total 1246 HRs derived from 38 populations were selected by protocols at varying rates: 13.2% by Breeder, 10% by NDVI+, 3% by NDVI-, and 6.1% by Breeder & NDVI+. NDVI values measured at the pre-heading stage in the HR and early grain filling in the Preliminary Yield Trial (PYT) showed strong correlations with grain yield (r= 0.55** and r= 0.73**, respectively; p<0.01). Lines selected by NDVI+ and Breeder & NDVI+ protocols had higher mean NDVI and Area Under NDVI Curve (AUNDVIC) values than selected by Breeder and NDVI- protocols at both stages. The lines selected by Breeder & NDVI+ protocol had the highest mean grain yields, while NDVI- had the lowest at both stages. Thirty-four lines were advanced to Advanced Yield Trial (AYT) stage: 14 by Breeder, 13 by NDVI+, 1 by NDVI-, and 6 by Breeder & NDVI+. Considering the higher proportion of lines advanced by NDVI+ and Breeder & NDVI+ protocols, and the correlation between mean NDVI and grain yield at the HR and PYT stages, revealed that NDVI can improve selection efficiency.