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<p>Wheat (<i>Triticum aestivum</i> L.) growth habit traits, such as prostrate and erect growth, play a significant role in determining plant competitiveness, water-use efficiency, and resilience to environmental stress. To find significant marker trait associations (MTAs), a panel of 105 diverse spring wheat genotypes, previously genotyped with 15&#xa0;K Infinium SNP array, was used to perform Genome-Wide Association Study (GWAS) of prostrate/erect growth habit (GH); flag leaf angle (FLA); plant height (PH), and tiller number per plant (TNPP). The phenotypic data was collected consistently over three consecutive years (2019–2020, 2020–2021, and 2021–2022). GWAS was conducted using five different models, including two single-locus models (GLM and MLM) and three multi-locus models (BLINK, FarmCPU, and MLMM), with a statistical significance threshold of − log10 (<i>p</i>) &gt; 3. This rigorous analysis unveiled a total of 284 significant MTAs for all four traits across different environments and as well as from combined environment (CE). The highest number of MTAs putatively related to the traits was found on chromosomes 2D, 5B, 2B, and 3B. Subsequently, we used these MTAs to pinpoint 55 candidate genes (CGs) linked to the four studied traits. Zinc-finger transcription factors, such as C2H2 and CCCH; ABC transporter; glycoside hydrolase; ankyrin repeat protein and F-Box domain, known to be involved in studied traits were found as among the most likely CGs. Furthermore, an <i>in silico</i> expression analysis of these CGs was performed in various plant tissues and at different developmental stages. The results can contribute to a better understanding of the mechanisms that control prostrate and erect growth habits in wheat, and enhance its potential to adapt to resource-constrained environments.</p>

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Genome-Wide Association Mapping of Prostrate/Erect Growth Habit and Other Yield Related Traits in Spring Wheat (Triticum aestivum L.)

  • 期刊论文

  • 发表日期：

    2025年7月24日

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  • Satish Kumar,
  • Vikas Kumar Singh,
  • Saksham Pundir,
  • Akash Gaurav,
  • Shiveta Sharma,
  • Marion S. Röder,
  • Shailendra Sharma

摘要

Wheat (Triticum aestivum L.) growth habit traits, such as prostrate and erect growth, play a significant role in determining plant competitiveness, water-use efficiency, and resilience to environmental stress. To find significant marker trait associations (MTAs), a panel of 105 diverse spring wheat genotypes, previously genotyped with 15 K Infinium SNP array, was used to perform Genome-Wide Association Study (GWAS) of prostrate/erect growth habit (GH); flag leaf angle (FLA); plant height (PH), and tiller number per plant (TNPP). The phenotypic data was collected consistently over three consecutive years (2019–2020, 2020–2021, and 2021–2022). GWAS was conducted using five different models, including two single-locus models (GLM and MLM) and three multi-locus models (BLINK, FarmCPU, and MLMM), with a statistical significance threshold of − log10 (p) > 3. This rigorous analysis unveiled a total of 284 significant MTAs for all four traits across different environments and as well as from combined environment (CE). The highest number of MTAs putatively related to the traits was found on chromosomes 2D, 5B, 2B, and 3B. Subsequently, we used these MTAs to pinpoint 55 candidate genes (CGs) linked to the four studied traits. Zinc-finger transcription factors, such as C2H2 and CCCH; ABC transporter; glycoside hydrolase; ankyrin repeat protein and F-Box domain, known to be involved in studied traits were found as among the most likely CGs. Furthermore, an in silico expression analysis of these CGs was performed in various plant tissues and at different developmental stages. The results can contribute to a better understanding of the mechanisms that control prostrate and erect growth habits in wheat, and enhance its potential to adapt to resource-constrained environments.