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Related Experiment Videos

From plant genomics to breeding practice.

Michele Morgante1, Francesco Salamini

  • 1Dipartimento di Produzione Vegetale e Tecnologie Agrarie, Universita' di Udine, Via delle Scienze 208, 33100, Udine, Italy. morgante@dpvta.uniud.it

Current Opinion in Biotechnology
|May 7, 2003
PubMed
Summary
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Crop selection accumulates new alleles, driving genomic studies of quantitative trait loci (QTL). Advances in mapping and cloning are expected, enhancing marker-assisted selection in plant breeding.

Area of Science:

  • Plant genetics and breeding
  • Genomics and bioinformatics

Background:

  • Crop improvement relies on accumulating genetic variation through selection.
  • Understanding the genetic basis of quantitative traits is crucial for efficient breeding.

Purpose of the Study:

  • To review the molecular basis of quantitative trait variation in crops.
  • To discuss genomic approaches for identifying genes underlying quantitative trait loci (QTL).
  • To evaluate the future role of marker-assisted selection in plant breeding.

Main Methods:

  • Review of current literature on crop genetics and genomics.
  • Analysis of strategies for QTL fine mapping and gene cloning.
  • Discussion of regulatory variation and its impact on quantitative traits.

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Main Results:

  • New alleles are continuously generated during crop selection.
  • Genomic approaches, including linkage disequilibrium and candidate gene strategies, accelerate the discovery of quantitative trait nucleotides.
  • Regulatory variations also contribute to the genetic architecture of crop traits.

Conclusions:

  • The discovery of genes underlying quantitative variation is accelerating.
  • Marker-assisted selection's effectiveness in plant breeding is contingent upon a robust understanding of the genetic models governing quantitative traits.