COMPARING OF EFFICIENCY OF MULTIVARIATE STATISTICAL METHODS WITH A 2- STEP SCREENING METHOD FOR SELECTION WHEAT GENOTYPES WITH FAVORABLE YIELD POTENTIAL AND TOLERANCE TO WATER SCARCITY

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MOTTAGHI M.; NAJAFIAN G.; BIHAMTA M.R.

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Paper Information

Journal: CROP PRODUCTION IN ENVIRONMENTAL STRESS Year:2010 | Volume:2 | Issue:1-2 (SERIAL 4) Page(s): 39-54

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Title

COMPARING OF EFFICIENCY OF MULTIVARIATE STATISTICAL METHODS WITH A 2- STEP SCREENING METHOD FOR SELECTION WHEAT GENOTYPES WITH FAVORABLE YIELD POTENTIAL AND TOLERANCE TO WATER SCARCITY

Author(s)

MOTTAGHI M. | NAJAFIAN G. | BIHAMTA M.R. | Issue Writer Certificate

Keywords

STRESS TOLERANCE INDICESQ2

PCA METHODQ3

CLUSTER ANALYSIS AND 2- STEP SCREENING METHODQ3

Abstract

In order to compare the efficiency of multivariate statistical methods (cluster analysis and Principal Component Analysis: PCA) with a new method known as "2- step screening method" for selection of wheat genotypes with high yield potential and good drought tolerance, this study was performed. For this, 180 hexaploid wheat genotypes were studied during 2005/2006 cropping season under two conditions of well irrigation and shortage of water (from anthesis on wards) in Karaj. Drought resistance indices including stress susceptibility index (SSI), tolerance index (TOL), mean productivity (MP), stress tolerance index (STI) and geometric mean productivity (GMP) were calculated for all investigated genotypes. Study of correlation coefficients among these indices and grain yield in two conditions for all genotypes showed that STI is better than other indices for screening genotypes with favorable yield in both conditions. But, because the STI value was still significantly affected by higher grain yield in normal conditions, identifying favorable genotypes followed using 3 methods. Study of grain yield under normal and stress conditions and tolerance indices showed that "2-step screening method" is more efficient than the other two methods. This method is based on completing cluster analysis with application of a defined cut off line for SSI index (through establishing a relationship between SI and SSI) to screen out stress susceptible genotypes among first step selected genotypes, hence suggested to be applied in breeding programs.

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APA: Copy

MOTTAGHI, M., NAJAFIAN, G., & BIHAMTA, M.R.. (2010). COMPARING OF EFFICIENCY OF MULTIVARIATE STATISTICAL METHODS WITH A 2- STEP SCREENING METHOD FOR SELECTION WHEAT GENOTYPES WITH FAVORABLE YIELD POTENTIAL AND TOLERANCE TO WATER SCARCITY. CROP PRODUCTION IN ENVIRONMENTAL STRESS, 2(1-2 (SERIAL 4)), 39-54. SID. https://sid.ir/paper/232052/en

Vancouver: Copy

MOTTAGHI M., NAJAFIAN G., BIHAMTA M.R.. COMPARING OF EFFICIENCY OF MULTIVARIATE STATISTICAL METHODS WITH A 2- STEP SCREENING METHOD FOR SELECTION WHEAT GENOTYPES WITH FAVORABLE YIELD POTENTIAL AND TOLERANCE TO WATER SCARCITY. CROP PRODUCTION IN ENVIRONMENTAL STRESS[Internet]. 2010;2(1-2 (SERIAL 4)):39-54. Available from: https://sid.ir/paper/232052/en

IEEE: Copy

M. MOTTAGHI, G. NAJAFIAN, and M.R. BIHAMTA, “COMPARING OF EFFICIENCY OF MULTIVARIATE STATISTICAL METHODS WITH A 2- STEP SCREENING METHOD FOR SELECTION WHEAT GENOTYPES WITH FAVORABLE YIELD POTENTIAL AND TOLERANCE TO WATER SCARCITY,” CROP PRODUCTION IN ENVIRONMENTAL STRESS, vol. 2, no. 1-2 (SERIAL 4), pp. 39–54, 2010, [Online]. Available: https://sid.ir/paper/232052/en

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