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Dissecting genetic loci of yield, yield components, and protein content in bread wheat nested association mapping population

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Abstract

In the last century wheat breeding programs have shown consistent yield increases, often associated with lower grain protein concentrations (GPC). A better understanding of the genetic basis of grain yield and grain protein content can help break the grain yield—GPC negative correlation. We developed a nested association mapping population composing a set of spring wheat genotypes for genetic dissection of grain yield and quality with ‘Blanca Fuerte’ (high yield and low grain protein content) as recurrent parent and cultivars and advanced lines from CIMMYT and California (UC Davis breeding program, medium–high yield and grain protein content). The QTL analyses revealed three genomic regions on chromosomes 2B, 6A, and 6B associated with significant increases in GPC but negative effects on yield, and one region on chromosome 5B associated with significant increases in grain yield but negative effects on GPC. More interestingly, we identified two genomic regions on chromosomes 2B and 3B associated with increases in GPC and no significant effects on grain yield and a genomic region on chromosome 1A associated with a significant increase in grain yield and no penalty in GPC. These last three genomic regions and their associated markers are promising tools for wheat breeding programs interested in breaking the negative correlation between GPC and grain yield.

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Data availability

The datasets generated during and/or analyzed during the current study are available in the supplementary files.

Abbreviations

QTL:

Quantitative trait locus

CIMMYT:

International Maize and Wheat Improvement Center

GPC:

Grain protein content

YLD:

Yield

IWGSC:

International Wheat Genome Sequencing Consortium

NAM:

Nested Association Mapping

RIL:

Recombinant inbred line

HWSN:

Hard white spring wheat

HRSW:

Hard red spring wheat

HMW-G:

High molecular weight glutenin

2NS:

Translocation from Aegilops ventricosa (Zhuk.)

UC:

University of California

CA:

California

N:

North

S:

South

W:

West

RIBD:

Randomized incomplete block design

BLUE:

Best linear unbiased estimator

H2:

Broad sense heritability

MIXED::

Linear model procedure

SNPs:

Single nucleotide polymorphisms

DNA:

Deoxyribonucleic acid

USDA:

U.S. Department of Agriculture

CTAB:

(Also called hexadecyltrimethylammonium bromide) is a cationic detergent

CIM:

Composite interval mapping

LOD:

Logarithm of odds

PH:

Plant height

HD:

Heading date

TKW:

Thousand kernel weight

SKLT:

Spikelets per spike

GN:

Grain number per square meter

SF:

Spike fertility

HI:

Harvest index

DB:

Dry biomass

TW:

Test weight

GW:

Grain weight

GNS:

Grains number per spike

HIS:

Harvest index per spike

GxE:

Genotype by environment

DVS:

Davis

MJ:

Marcos Juárez

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Acknowledgements

The authors thank Dr. Jorge Dubcovsky (UCDavis, California, EEUU) for kindly providing the Nested Association Mapping population, the genotyping used in this study, and the support to carry out the field experiments at the University of California, Davis.

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Authors and Affiliations

Authors

Contributions

GD and MH conceived the experiments and the manuscript; GD, CB, and OC carried out the field experiments; GD obtained all the phenotypic information used; GD and LM performed the grain protein content analysis; GD and MBC and LSV performed the QTL and statistical analysis; MH, GD, and LSV drafted the manuscript; MH, LB, and LSV improved the manuscript. All the authors approved the final version of the manuscript.

Corresponding author

Correspondence to Marcelo Helguera.

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The authors declare that there is no conflict of interest.

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Supplementary Information

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Supplementary file1 (PPTX 972 KB)

Supplementary file2 (XLSX 1669 KB)

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Donaire, G., Vanzetti, L.S., Conde, M.B. et al. Dissecting genetic loci of yield, yield components, and protein content in bread wheat nested association mapping population. Euphytica 219, 65 (2023). https://doi.org/10.1007/s10681-023-03195-0

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  • DOI: https://doi.org/10.1007/s10681-023-03195-0

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