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Breeding by Design for Functional Rice with Genome Editing Technologies
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A universal core genetic map for rice.

Julie Orjuela1, Andrea Garavito, Matthieu Bouniol

  • 1Agrobiodiversity and Biotechnology Project, International Center for Tropical Agriculture (CIAT), AA 6713 Cali, Colombia.

TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik
|October 23, 2009
PubMed
Summary
This summary is machine-generated.

A Universal Core Genetic Map (UCGM) was developed for rice (Oryza sativa L.) to create comparable, low-resolution genetic maps. This tool aids rice genetics and breeding, especially for interspecific hybridization strategies.

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Area of Science:

  • Plant Genetics
  • Genomics
  • Bioinformatics

Background:

  • Developing low-resolution genetic maps in rice (Oryza sativa L.) is challenging due to the need for evenly distributed markers.
  • Existing genetic mapping methods may not provide sufficient resolution or comparability across different populations.

Purpose of the Study:

  • To develop a Universal Core Genetic Map (UCGM) for rice to facilitate the creation of easily comparable, low-resolution genetic maps.
  • To provide a standardized set of markers for efficient genetic mapping in rice and related species.

Main Methods:

  • Derived 165 anchors, each comprising three closely linked microsatellite or simple sequence repeat (SSR) markers, with even distribution across rice chromosomes.
  • Utilized in silico tools and databases (Gramene, OrygenesDB) for anchor selection based on the Nipponbare genome sequence.
  • Evaluated marker polymorphisms across sixteen AA-genome accessions of the Oryza genus, including O. sativa and wild relatives.

Main Results:

  • Developed a UCGM with 165 evenly distributed SSR marker anchors.
  • Identified high levels of polymorphism in interspecific crosses (O. sativa x O. glaberrima, O. sativa x wild rice).
  • Created the Paddy Map database to assist in selecting polymorphic SSRs for specific crosses.
  • Validated the UCGM by constructing three interspecific genetic maps and comparing genetic and physical marker positions.

Conclusions:

  • The UCGM is a valuable tool for the rice genetics and breeding community.
  • It simplifies the development of comparable, low-resolution genetic maps.
  • The UCGM is particularly beneficial for strategies employing interspecific hybridization.