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GrainGenes Reference Report: TAG-134-2079

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Reference	TAG-134-2079
Title	QTL mapping for grain yield and three yield components in a population derived from two high-yielding spring wheat cultivars
Journal	Theoretical and Applied Genetics
Year	2021
Volume	134
Pages	2079-2095
Author	Isham K [ Show all 7 ]
Abstract	Genetic manipulation of yield components is an important approach to increase grain yield in wheat (Triticum aestivum). The present study used a mapping population comprised of 181 doubled haploid lines derived from two high-yielding spring wheat cultivars, UI Platinum and LCS Star. The two cultivars and the derived population were assessed for six traits in eight field trials primarily in Idaho in the USA. The six traits were grain yield, fertile spikelet number per spike, productive tiller number per unit area, thousand kernel weight, heading date, and plant height. Quantitative Trait Locus (QTL) analysis of the six traits was conducted using 14,236 single-nucleotide polymorphism (SNP) markers generated from the wheat 90 K SNP and the exome and promoter capture arrays. Of the 19 QTL detected, 14 were clustered in four chromosomal regions on 4A, 6A, 7B and 7D. Each of the four QTL clusters was associated with multiple yield component traits, and these traits were often negatively correlated with one another. As a result, additional QTL dissection studies are needed to optimize trade-offs among yield component traits for specific production environments. Kompetitive allele-specific PCR markers for the four QTL clusters were developed and assessed in an elite spring wheat panel of 170 lines, and eight of the 14 QTL were validated. The two parents contain complementary alleles for the four QTL clusters, suggesting the possibility of improving grain yield via genetic recombination of yield component loci.
External Databases	https://doi.org/10.1007/s00122-021-03806-1
Gene	FT-A2 (Triticum)
Summarized in	Glenn P and Dubcovsky J MAS Wheat. Bringing Genomics to the Wheat Fields. Spikelet number per spike gene FT-A2 MAS Wheat. Marker Assisted Selection in Wheat.

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