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Monohybrid Crosses01:20

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Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
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  11. Genetic Dissection Of Crown Rust Resistance In Oat And The Identification Of Key Adult Plant Resistance Genes.
  1. Home
  3. Research Domains
  5. Biological Sciences
  7. Plant Biology
  9. Plant Pathology
  11. Genetic Dissection Of Crown Rust Resistance In Oat And The Identification Of Key Adult Plant Resistance Genes.

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Genetic dissection of crown rust resistance in oat and the identification of key adult plant resistance genes.

Nikwan Shariatipour1, Mahboobeh Yazdani1, Anders Carlsson1

  • 1Department of Plant Breeding, Swedish University of Agricultural Sciences, Alnarp, Sweden.

The Plant Genome
|June 13, 2025

View abstract on PubMed

Summary
This summary is machine-generated.

Crown rust resistance in oats is improved by identifying and mapping quantitative trait loci (QTLs). This study identified 23 meta-QTLs and 1526 candidate genes, aiding breeding for enhanced disease resistance.

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Area of Science:

  • Plant genetics
  • Agricultural science
  • Molecular biology

Background:

  • Crown rust (Puccinia coronata f. sp. Avenae) significantly impacts global oat production.
  • Developing resistant oat cultivars is crucial for disease management.
  • Identifying and deploying resistance genes is the most effective strategy.

Purpose of the Study:

  • To conduct a meta-analysis of quantitative trait loci (QTLs) associated with crown rust resistance in oats.
  • To identify and map these QTLs across diverse oat populations and environments.
  • To provide a resource for oat breeding programs.

Main Methods:

  • Meta-analysis of 167 QTLs from 11 studies (2003-2024).
  • Mapping QTLs onto an oat consensus linkage map.
  • Meta-QTL (MQTL) analysis to identify resistance regions.
  • Gene mining and functional analysis within MQTL intervals.
  • Identification of conserved regulatory elements (cis-acting regulatory element [CAREs]).

    • Main Results:

    • 127 QTLs mapped to oat chromosomes, primarily in D and C sub-genomes.
    • 23 MQTLs identified for crown rust resistance.
    • 1526 candidate genes identified, predominantly in the D sub-genome.
    • Candidate genes involved in stress response, hormonal regulation, and polyamine metabolism.
    • CAREs identified in promoter regions of resistance genes.

    Conclusions:

    • This study advances understanding of the genetic basis of oat crown rust resistance.
    • Identified MQTLs and candidate genes offer valuable resources for breeding programs.
    • Findings facilitate the development of oat cultivars with improved disease resistance.