Deciphering the Genetics of Major End-Use Quality Traits in Wheat

G3 : Genes - Genomes - Genetics
Sepehr Mohajeri NaraghiM Mergoum

Abstract

Improving the end-use quality traits is one of the primary objectives in wheat breeding programs. In the current study, a population of 127 recombinant inbred lines (RILs) derived from a cross between Glenn (PI-639273) and Traverse (PI-642780) was developed and used to identify quantitative trait loci (QTL) for 16 end-use quality traits in wheat. The phenotyping of these 16 traits was performed in nine environments in North Dakota, USA. The genotyping for the RIL population was conducted using the wheat Illumina iSelect 90K SNP assay. A high-density genetic linkage map consisting of 7,963 SNP markers identified a total of 76 additive QTL (A-QTL) and 73 digenic epistatic QTL (DE-QTL) associated with these traits. Overall, 12 stable major A-QTL and three stable DE-QTL were identified for these traits, suggesting that both A-QTL and DE-QTL played an important role in controlling end-use quality traits in wheat. The most significant A-QTL (AQ.MMLPT.ndsu.1B) was detected on chromosome 1B for mixograph middle line peak time. The AQ.MMLPT.ndsu.1B A-QTL was located very close to the position of the Glu-B1 gene encoding for a subunit of high molecular weight glutenin and explained up to 24.43% of phenotypic variation for mixograph MID l...Continue Reading

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Citations

Jul 8, 2020·Molecular Biology Reports·Mohamed BarakatIbrahim Al-Ashkar

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Methods Mentioned

BETA
rheology
dissection
Genotyping

Software Mentioned

Mapchart
Excel
MAPMARKER
EXP
QTL IciMapping
Mixsmart
SAS
Traverse
Genome Studio Polyploid Clustering Module
MSTmap

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