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Specific patterns of genetic diversity among aromatic rice varieties in Myanmar

Myint Khin M., Courtois Brigitte, Risterucci Ange-Marie, Frouin Julien, Soe Khin, Thet Khin M., Vanavichit Apichart, Glaszmann Jean-Christophe. 2012. Specific patterns of genetic diversity among aromatic rice varieties in Myanmar. Rice, 5 (20), 13 p.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : AGRONOMY

Abstract : Background After observing peculiar rice varieties in Myanmar, in terms of classification in varietal groups and of grain quality, we focused on Myanmar varieties and analyzed variations at 19 microsatellite loci as well as sequences of the aroma gene BADH2. Results Microsatellites were able to retrieve the well-established classification into Indica (isozyme group 1), Japonica (group 6, comprising temperate and tropical forms) and specific groups from the Himalayan foothills including some Aus varieties (group 2) and some aromatic varieties (group 5). They revealed a new cluster of accessions close to, but distinct from, non-Myanmar varieties in group 5. With reference to earlier terminology, we propose to distinguish a group "5A" including group 5 varieties from the Indian subcontinent (South and West Asia) and a group "5B" including most group 5 varieties from Myanmar. In Myanmar varieties, aroma was distributed in group 1 (Indica) and in group 5B. New BADH2 variants were found. Some accessions carried a 43?bp deletion in the 3' UTR that was not completely associated with aroma. Other accessions, all of group 5B, displayed a particular BADH2 allele with a 3?bp insertion and 100% association with aroma. Conclusion With the new group and the new alleles found in Myanmar varieties, our study shows that the Himalayan foothills contain series of non-Indica and non-Japonica varietal types with novel variations for useful traits. (Résumé d'auteur)

Mots-clés Agrovoc : Oryza sativa, Variation génétique, Flaveur, Variété, Collection de matériel génétique, Gène, Identification, Marqueur génétique, Microsatellite, Polymorphisme génétique

Mots-clés géographiques Agrovoc : Myanmar, Asie occidentale, Asie du Sud

Mots-clés complémentaires : SSR, Séquencage

Classification Agris : F30 - Plant genetics and breeding
Q04 - Food composition

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

  • Myint Khin M., Plant Biotechnology Center (MMR)
  • Courtois Brigitte, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0003-2118-7102
  • Risterucci Ange-Marie, CIRAD-BIOS-UMR AGAP (FRA)
  • Frouin Julien, CIRAD-BIOS-UMR AGAP (FRA)
  • Soe Khin, Ministry of Agriculture and Irrigation (Birmanie) (MMR)
  • Thet Khin M., Plant Biotechnology Center (MMR)
  • Vanavichit Apichart, Kasetsart University (THA)
  • Glaszmann Jean-Christophe, CIRAD-BIOS-UMR AGAP (FRA) ORCID: 0000-0001-9918-875X

Source : Cirad - Agritrop (https://agritrop.cirad.fr/566237/)

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