Activity 2. Composite population breeding. Upland savannas ecosystem : Annual report 2001. September 2000 - September 2001

Châtel Marc, Ospina Yolima, Rodriguez F., Lozano Victor Hugo. 2001. Activity 2. Composite population breeding. Upland savannas ecosystem : Annual report 2001. September 2000 - September 2001. Montpellier : CIRAD-CA, 21 p.

Résumé : Since 1996, following CIAT's recommendations, CIAT and CIAT/CIRAD projects have phased out "Japonica" Oryza sativa by "Japonica" Oryza sativa conventional crossbreeding activities and concentrate on broadening the genetic base of upland rice. The development of rice populations with broad genetic base and their enhancement through recurrent selection are new breeding strategies to achieve this objective. Using a recessive male-sterile gene (ms) from a mutant of IR36, the development of rice population was eased. Site-specific populations were developed with NARS. In Colombia upland basic populations were enhanced using two recurrent selection-breeding methods. At each enhancement cycle, fertile plants are selected. They are the starting-point of segregating progenies therefore selected by conventional pedigree method. In 2001, more than 90% of the lines under evaluation and selection come from recurrent populations. The most advanced lines are evaluated in yield trials in Colombia where very promising results are coming-out.

Mots-clés Agrovoc : riz pluvial, Oryza sativa, amélioration des plantes, essai de variété, sélection récurrente, population composite

Mots-clés géographiques Agrovoc : Colombie, Amérique latine, Chine

Classification Agris : F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Châtel Marc, CIRAD-CA-CALIM (COL)
• Ospina Yolima
• Rodriguez F.
• Lozano Victor Hugo

Source : Cirad - Agritrop (https://agritrop.cirad.fr/486901/)

Métriques

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