Yield response of rice (Oryza sativa L.) genotypes to different types of drought under rainfed lowlands - Part 1. Grain yield and yield components

摘要: Responses of rice genotypes to drought stress may be different when characteristics the environments differ. The performance 128 was examined under irrigation and four types stress, determine genotypic consistency in yield factors determining yields conditions. conditions were mild during grain filling, short severe at flowering, prolonged reproductive vegetative filling. Genotypic associated with irrigated conditions, indicating importance potential where reduction less than 50%. However, differed over time locations. Under or flowering an important determinant yield. Earlier escaped had higher large genotype by environment (G x E) interactions which have implications for plant breeding even stress. It is suggested that variations time, patterns need considered development drought-resistant cultivars using specific physiological traits. (C) 2002 Elsevier Science B.V. All rights reserved.