Chlorophyll fluorescence parameters and drought tolerance in a mapping population of winter bread wheat in the highlands of Iran |
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Authors: | M Roostaei S A Mohammadi A Amri E Majidi M Nachit R Haghparast |
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Institution: | 1.Science and Research Unit of Tehran Azad Eslamic University,Tehran,Iran;2.Dryland Agricultural Research Institute (DARI),Maragheh,Iran;3.Department of Agronomy and Plant Breeding, Faculty of Agriculture,University of Tabriz,Tabriz,Iran;4.International Center for Agricultural Research in the Dry Areas (ICARDA),Aleppo,Syria;5.Agricultural Biotechnology Research Institute (ABRI),Karaj,Iran;6.Dryland Agricultural Research Institute,Sararood,Iran |
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Abstract: | The usefulness of fluorescence parameters as drought tolerance selection criteria for winter bread wheat in the highlands
of Iran was studied. A population of 142 recombinant inbred lines, derived from a cross between two common wheat varieties,
Azar2 (winter type) and 87Zhong291 (facultative type), was used to analyze the correlation between grain yield and chlorophyll
fluorescence parameters at the grain-filling stage under drought stress and supplementary irrigation conditions during 2006–2007
and 2007–2008 seasons at Maragheh experiment station of the Dryland Agricultural Research Institute (DARI) using a RCBD with
three replications. The results showed significant differences among the lines in the grain yield and all fluorescence parameters
under rainfed and irrigation conditions. The values of chlorophyll content, F
0, F
m, F
v, F
v/F
m, LWP, YPEC, NPQ, and PI in the drought-tolerant genotypes were significantly higher than those in drought-sensitive genotypes
under drought stress. Significant differences were observed between slope coefficients under drought, but not under supplementary
irrigation conditions except NPQ (P = 5%). It was concluded that chlorophyll content, F
0, F
m, F
v, F
v/F
m, LWP, YPEC, NPQ, and PI could be used as additional indicators in screening wheat germplasm for drought tolerance. |
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Keywords: | |
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