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Genome-Wide Association Studies of Agronomic and Quality Traits in Durum Wheat

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  • Stefan Tsonev

    (Department of Functional Genetics, Abiotic and Biotic Stress, AgroBioInstitute, Agricultural Academy, 1164 Sofia, Bulgaria)

  • Rangel Dragov

    (Department of Durum Wheat Breeding, Field Crops Institute, Agricultural Academy, 6200 Chirpan, Bulgaria)

  • Krasimira Taneva

    (Department of Durum Wheat Breeding, Field Crops Institute, Agricultural Academy, 6200 Chirpan, Bulgaria)

  • Nikolai Kirilov Christov

    (Department of Functional Genetics, Abiotic and Biotic Stress, AgroBioInstitute, Agricultural Academy, 1164 Sofia, Bulgaria)

  • Violeta Bozhanova

    (Department of Durum Wheat Breeding, Field Crops Institute, Agricultural Academy, 6200 Chirpan, Bulgaria)

  • Elena Georgieva Todorovska

    (Department of Functional Genetics, Abiotic and Biotic Stress, AgroBioInstitute, Agricultural Academy, 1164 Sofia, Bulgaria)

Abstract

Durum wheat is mainly used for products for human consumption, the quality of which depends on the content of protein and yellow pigments in the semolina. The challenges faced by modern breeding, related to population growth and climate change, imply improvement of both grain yields and quality in durum wheat germplasm well adapted to specific agro-climatic conditions. To address those challenges, a better understanding of the genetic architecture of agronomic and quality traits is needed. In the current study we used the Genome-Wide Association Study (GWAS) approach in a panel of Bulgarian and foreign genotypes to define loci controlling agronomic and quality traits in durum wheat. We mapped 26 marker traits associations (MTAs) for four of the six studied traits—grain yield, grain protein content, seed yellow colour (CIELAB b*), and plant height. The greatest number of MTAs was detected for grain yield. Seven MTAs were detected for each grain protein content and seed colour, and one MTA for plant height. Most of the reported associations had confidence intervals overlapping with already reported quantitative trait loci (QTLs). Two loci controlling grain yield were not reported previously. The MTAs reported here may be a valuable tool in future breeding for improvement of both grain yield and quality in durum wheat.

Suggested Citation

  • Stefan Tsonev & Rangel Dragov & Krasimira Taneva & Nikolai Kirilov Christov & Violeta Bozhanova & Elena Georgieva Todorovska, 2024. "Genome-Wide Association Studies of Agronomic and Quality Traits in Durum Wheat," Agriculture, MDPI, vol. 14(10), pages 1-20, October.
  • Handle: RePEc:gam:jagris:v:14:y:2024:i:10:p:1743-:d:1491667
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    References listed on IDEAS

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    1. Bates, Douglas & Mächler, Martin & Bolker, Ben & Walker, Steve, 2015. "Fitting Linear Mixed-Effects Models Using lme4," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 67(i01).
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