An investigation of the grain yield adaptation of advanced CIMMYT [International Maize and Wheat Improvement Center] wheat lines to water stress environments in Queensland, 1. Crop physiological analysis.
1994
Cooper M. | Byth D.E. | Woodruff D.R.
The opportunity for further yield improvement in Queensland was investigated by comparing CIMMYT lines and Queensland cultivars in irrigated and dryland environments at 3 locations. CIMMYT lines were identified, with greater than 20 percent yield advantage in individual environments and between 15 and 20 percent yield advantage over the 6 environments. The line mean repeatability for yield was moderate, with the variance component for line by environment (L x E) interactions 4.2 times that for lines. Therefore, while the CIMMYT lines expressed considerable L x E interaction, there was scope for further yield improvement. The water stress differential between the irrigated and dryland environments at the 3 locations strongly influenced L x E interaction for grain yield. Pre-anthesis water stress generated more L x E interaction for grain yield than post-anthesis stress. Grain yield was positively associated with the yield component grain number per unit area in all environments. Grain number per unit area was positively associated with the component grains per fertile tiller but not tiller number per unit area. There was a weak association between days to anthesis and grain yield in 4 of the 6 environments.
Afficher plus [+] Moins [-]Mots clés AGROVOC
Informations bibliographiques
Cette notice bibliographique a été fournie par Wolters Kluwer
Découvrez la collection de ce fournisseur de données dans AGRIS