Coping with reduced inputs, especially in terms of yield stability under the various stress conditions that frequently occur in the drought-prone areas of the Mediterranean basin, is a main objective for durum wheat improvement. A total of 249 RILs (Kofa × Svevo) were evaluated in 16 trials conducted in 2004-2005 under a broad range of water input and yield potential. Two major, epistatic QTLs on chrs. 2BL and 3BS influenced grain yield and related physiological traits in a wide range of environments. In both cases, coincidence between the QTLs for grain yield and those for plant height, peduncle length, SPAD, NDVI index and kernel weight was observed. Epistasis favoured the parental genotypes. On a mean basis, the R2 values for grain yield of the 2BL and 3BS QTLs were equal to 21.5 and 13.8%, respectively. The effects of these two QTLs were validated in a set of 11 trials conducted in 2006 using 40 selected RILs.
Two major QTLs on chrs. 2BL and 3BS influence grain yield in durum wheat across a broad range of water regimes / MACCAFERRI M.; SANGUINETI M.C.; ARAUS ORTEGA J.L.; BEN SALEM M.; EL-AHMED A.; DEL MORAL L.F.G.; DEMONTIS A.; MAALOUF F.; NACHIT M.; NSERALLAH N.; ROYO C.; TUBEROSA R.. - ELETTRONICO. - (2008), pp. 1-3. (Intervento presentato al convegno 11th International Wheat Genetics Symposium 2008 tenutosi a Brisbane, Australia nel 24-29 August 2008).
Two major QTLs on chrs. 2BL and 3BS influence grain yield in durum wheat across a broad range of water regimes
MACCAFERRI, MARCO;SANGUINETI, MARIA CORINNA;TUBEROSA, ROBERTO
2008
Abstract
Coping with reduced inputs, especially in terms of yield stability under the various stress conditions that frequently occur in the drought-prone areas of the Mediterranean basin, is a main objective for durum wheat improvement. A total of 249 RILs (Kofa × Svevo) were evaluated in 16 trials conducted in 2004-2005 under a broad range of water input and yield potential. Two major, epistatic QTLs on chrs. 2BL and 3BS influenced grain yield and related physiological traits in a wide range of environments. In both cases, coincidence between the QTLs for grain yield and those for plant height, peduncle length, SPAD, NDVI index and kernel weight was observed. Epistasis favoured the parental genotypes. On a mean basis, the R2 values for grain yield of the 2BL and 3BS QTLs were equal to 21.5 and 13.8%, respectively. The effects of these two QTLs were validated in a set of 11 trials conducted in 2006 using 40 selected RILs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
