GrainGenes Reference Report: FSE-6:Liu
Reference
FSE-6:Liu
Title
Spectral reflectance indices as proxies for yield potential and heat stress tolerance in spring wheat: heritability estimates and marker-trait associations
Journal
Frontiers of Agricultural Science and Engineering
Year
2019
Volume
6
Author
Liu C Pinto FJM Cossani CM Sukumaran S Reynolds M
Abstract
The application of spectral reflectance indices (SRIs) as proxies to screen for yield potential (YP) and heat stress (HS) is emerging in crop breeding programs. Thus, a comparison of SRIs and their associations with grain yield (GY) under YP and HS conditions is important. In this study, we assessed the usefulness of twenty-seven SRIs for indirect selection for agronomic traits by evaluating an elite spring wheat association mapping initiative (WAMI) population comprising 287 elite lines under YP and HS conditions. Correlation and heritability analysis identified 11 and nine SRIs in different developmental stages as efficient indirect selection indices for yield in YP and HS conditions, respectively. We identified enhanced vegetation index (EVI) as the common SRI associated with GY under YP at booting, heading and late heading stages, whereas photochemical reflectance index (PRI) and normalized normalized difference vegetation index (NDVI) were the common SRIs under booting and heading stages in HS. Genome-wide association study (GWAS) using 18704 single nucleotide polymorphisms (SNPs) from Illumina iSelect 90K identified 280 and 43 marker-trait associations for efficient SRIs at different developmental stages under YP and HS, respectively. Common genomic regions for multiple SRIs were identified in 14 regions in nine chromosomes: 1B (60-62 cM), 3A (15, 85-90, 101-105 cM), 3B (132-134 cM), 4A (47-51 cM), 4B (71-75 cM), 5A (43-49, 56-60, 89-93 cM), 5B (124-125 cM), 6A (80-85 cM), and 6B (57-59, 71 cM). Among them, SNPs in chromosome 5A (89-93 cM) and 6A (80-85 cM) were co-located for yield and yield related traits. Overall, this study highlights the utility of SRIs as proxies to predict GY under YP and HS. High heritability estimates and identification of marker-trait associations indicate that SRIs are useful tools for understanding the genetic basis of agronomic and physiologic traits.
External Databases
https://doi.org/10.15302/J-FASE-2019269
QTL
GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.
GrainGenes Reference Report: FSE-6:Liu
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GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture. | |||