Evaluation of End Drought Tolerance of 12 Wheat Genotypes by Stress Indices

Content Provider	Semantic Scholar
Author	Mollasadeghi, Vahid Valizadeh, Mostafa Shahryari, Reza Imani, Ali Akbar
Copyright Year	2011
Abstract	3 Abstract: Wheat is the world's most important crop and drought is a global problem. Wheat production is subjected to water deficit after pollination in Ardabil. An experiment was conducted for assessing tolerance of 12 bread wheat genotypes to terminal drought. Experimental design was split plot on the basis of RB in three repetitions. The main factor was normal irrigation and terminal drought conditions and the sub factor was genotypes. Six Drought tolerance indices calculated for grain yield of genotypes. Toos produced the highest grain yield in the both normal irrigation by 4 ton/ha and terminal drought by 3.92 ton/ha. MP, GMP, STI and MSTI had the highest correlation with yield in both conditions, selected as the best indices. TOL introduced Gascogen and Ruzi-84 as tolerant genotypes to drought. By plot diagram charting was places Toos, 4041, 4061, MV17/zrn and Sabalan on A region. These were tolerant to drought and were suitable for normal condition. Gobustan, Gascogen and Ruzi-84 were placed in D region and identified as sensitive to drought. Genotypes 4057, 4041 and Toos that were placed in one group of cluster analysis are the best genotypes which have higher yield in both stressed and non-stressed conditions than other genotypes. Principal components analysis showed that 99% of total changes justified by the first component (Yield with 77%) and the second component (tolerance indices with 22%). There was a good match for results of cluster analysis and principal components analysis.
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Alternate Webpage(s)	http://www.idosi.org/wasj/wasj13(3)/24.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article