Is tillering efficiency a relevant trait in selecting for high yield potential in rice?

Pasuquin Estela Magbujos, Wiangsamut Bancha, Bueno Crisanta Sunio, Lafarge Tanguy. 2007. Is tillering efficiency a relevant trait in selecting for high yield potential in rice?. In : 20th Scientific Conference of Federation of Crop Science Societies of the Philippines, June 13-16, 2007, Tagaytay, Philippines. s.l. : s.n., 1 p. Scientific Conference of Federation of Crop Science Societies of the Philippines. 20, Tagaytay, Philippines, 13 Juin 2007/16 Juin 2007.

Résumé : Improving yield potential in rice implies the characterization of particular crop traits that may be used by breeders in their breeding programs. The rice crop is known to initiate and develop many tillers; a significant part of this may be higher than 50%, do not produce any grain. Recent breeding programs for yield potential have selected genotypes with high tillering efficiency (low tiller mortality) such as new plant types to reduce dry matter loss (Schnier et al 1990) and respiration cost (Dingkuhn et al 1990), but they did not produce the expected high yield in experimental fields. A positive correlation of grain yield with tillering efficiency would also imply a detrimental effect of non-productive tillers. We reviewed here a number of our recent field works to characterize the correlation between grain yield and tillering efficiency across genotypes of the same crop duration grown in similar favorable conditions and across crop managements for the same genotype.

Classification Agris : F01 - Culture des plantes
F30 - Génétique et amélioration des plantes

Auteurs et affiliations

• Pasuquin Estela Magbujos, IRRI [International Rice Research Institute] (PHL)
• Wiangsamut Bancha, IRRI [International Rice Research Institute] (PHL)
• Bueno Crisanta Sunio, IRRI [International Rice Research Institute] (PHL)
• Lafarge Tanguy, CIRAD-BIOS-UPR Peuplements de riz (PHL)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/555759/)

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