Ecology, Environment and Conservation Paper

Vol.15, Issue 03, 2009; Page No.(449-453)

EVALUATION OF DROUGHT TOLERANCE IN RICE VARIETIES USING DROUGHT TOLERANCE INDICES

Ebrahim Amiri, Hamid Reza Bozorgi, Morteza Khandan and Naser Mohammadian Roshan

Abstract

Identification and selection of tolerance varieties to drought in rice that in limited of water can have an acceptable yield are very important. In order to it in 2008, 8 varieties in four submerge irrigation, irrigation with 5, 8, 11 day interval in factorial experiment was studied in pot. For evaluation of varieties reaction with respect to water stress, that used for SSI, TOL, MP, STI, GMP experiments and HarM indices. In order to very significant and positive correlation that there are between STI, GMP and MP with grain yield in submerge irrigation and non-Submerge irrigation, it leads to selection of these three indices as the best selection criterion of varieties that are resistant to water stress for non-submerge irrigation management. Research results by different tolerance to drought indices that are between studied rice varieties, the Hybrid, Dorfak and Kadous emerge as tolerance varieties to drought.

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