The Physiology of Grain Yield in Wheat in an Irrigated Tropical Environment

Abstract

SUMMARYThe potential yield of wheat and the physiological basis of yield limitation in the lowland irrigated tropics was investigated in three cultivars planted at five sowing dates. Maximum grain yields were achieved by cultivars that flowered in January when the weather was coolest. The period from sowing to terminal spikelet initiation was similar for all varieties and all sowing treatments. The period from terminal spikelet initiation to ear emergence was increased when seed was sown in late November or early December rather than in October or early November. Manipulation of the sowing date in relation to the choice of cultivar had a considerable effect on grain yield.H. M. Ishag and O. A. A. Ageeb: Rendimiento del trigo en las zonas tropicales.