Fine mapping of a gene for low-tiller number, Ltn, in japonica rice (Oryza sativa L.) variety Aikawa 1

Fujita Daisuke, Ebron Leodegario A., Araki Etsuko, Kato Hiroshi, Khush Gurdev S., Sheehy John E., Lafarge Tanguy, Fukuta Yoshimichi, Kobayashi Nobuya. 2010. Fine mapping of a gene for low-tiller number, Ltn, in japonica rice (Oryza sativa L.) variety Aikawa 1. Theoretical and Applied Genetics, 120 (6) : 1233-1240.

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q1, Sujet : HORTICULTURE / Quartile : Q1, Sujet : PLANT SCIENCES / Quartile : Q2, Sujet : GENETICS & HEREDITY

Résumé : Tillering is one of the most important agronomic traits related to grain production in rice (Oryza sativa L.). A japonica-type variety, Aikawa 1, is known to have low-tiller number. The detailed location of a lowtillering gene, Ltn, which has been localized on chromosome 8 in Aikawa 1, was conWrmed by molecular mapping. Using BC5F2 individuals derived from a cross between IR64 and Aikawa 1, the low-tillering gene was mapped to an interval deWned by SSR markers ssr5816-3 and A4765. This was designated as Ltn because there was no reported gene for tillering in the region of chromosome 8. Through high-resolution linkage analysis, the candidate region of Ltn was located between DNA markers ssr6049-23 and ind6049-1 corresponding to 38.6 kbp on the Nipponbare genome sequence. These DNA markers, which were tightly linked to Ltn, are useful for marker-assisted selection in breeding studies.

Mots-clés Agrovoc : Oryza sativa, tallage, amélioration des plantes, phénotype, génotype, gène, identification, marqueur génétique, PCR

Mots-clés géographiques Agrovoc : France, Philippines, Japon

Mots-clés complémentaires : Oryza sativa japonica, Oryza sativa indica

Classification Agris : F30 - Génétique et amélioration des plantes
U30 - Méthodes de recherche

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

Auteurs et affiliations

• Fujita Daisuke, IRRI [International Rice Research Institute] (PHL)
• Ebron Leodegario A., IRRI [International Rice Research Institute] (PHL)
• Araki Etsuko, National Agricultural Research Centre (JPN)
• Kato Hiroshi, National Institute of Crop Science (JPN)
• Khush Gurdev S., IRRI [International Rice Research Institute] (PHL)
• Sheehy John E., IRRI [International Rice Research Institute] (PHL)
• Lafarge Tanguy, CIRAD-BIOS-UPR AIVA (PHL)
• Fukuta Yoshimichi, JIRCAS (JPN)
• Kobayashi Nobuya, IRRI [International Rice Research Institute] (PHL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/554869/)

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