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Genome-wide association analysis of spike and kernel traits in the U.S. hard winter wheat

South Dakota State University | Michigan State University
South Dakota State University (Brookings, SD, USA)Michigan State University (East Lansing, MI, USA)
The Plant Genome
2023
DOI available
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Genome-wide association analysis of spike and kernel traits in the U.S. hard winter wheat
Partner institutions
South Dakota State University logo
South Dakota State University

Brookings, SD, USA

A public land-grant research university in Brookings, South Dakota, home to a major wheat breeding and genetics program.

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Michigan State University logo
Michigan State University

East Lansing, MI, USA

A public land-grant research university in East Lansing, Michigan, with active programs in plant breeding and genetics.

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How Vibe analyzers were used

Kernel length, width, and area were recorded with a Vibe QM3 grain analyzer across 297 U.S. hard winter wheat accessions, feeding a genome-wide association study that identified 53 marker-trait associations for spike and kernel traits.

Study overview

Understanding the genetic control of spike and kernel traits supports development of higher-yielding wheat varieties. This study evaluated a panel of 297 hard winter wheat accessions from the U.S. Great Plains across three environments for eight spike- and kernel-related traits, including kernel length, width, and area, which were recorded using an automated Vibe QM3 grain analyzer. Analysis of 15,590 genetic markers identified 53 marker-trait associations across seven traits, with the most for spike length (16), followed by spikelets per spike (15) and spikelet density (11). Fourteen associations represented stable QTL across multiple environments, and five multi-trait associations were identified that could support trait pyramiding in breeding programs.

Topics and keywords
wheat
GWAS
kernel traits
spike traits
Vibe QM3
marker-assisted selection
Related crop analysis
Wheat imaging & analysis
Bibliographic details

Year: 2023

Publication: The Plant Genome

DOI: 10.1002/tpg2.20300

Institutions: South Dakota State University, Michigan State University

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