Article

Molecular aspects of drought tolerance in bread wheat (T. aestivum).

College of Agriculture, Razi University, Kermanshah, Iran.
Pakistan Journal of Biological Sciences 02/2008; 11(1):118-22. pp.118-22
Source: PubMed

ABSTRACT In order to evaluate molecular indices of drought tolerance and selection of drought tolerance genotypes in bread wheat a randomized complete block design was carried out with three replications in the field of research station of Sararood, Kermanshah, Iran. Positive significant correlation coefficient was observed between grain yield and proline, soluble sugar and total protein under rainfed condition. Based on the grain yield, proline content, soluble sugar and total protein the genotypes were classified into four clusters using cluster analysis and UPGMA method. Genotypes numbers 4, 9, 10, 11, 18 and 19 in the first clusters indicated the highest performance.

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    Article: Occurrence of Fusarium spp. and Fumonisins in Stored Wheat Grains Marketed in Iran.
    Khosrow Chehri, Saeed Tamadoni Jahromi, Kasa R N Reddy, Saeed Abbasi, Baharuddin Salleh
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    ABSTRACT: Wheat grains are well known to be invaded by Fusarium spp. under field and storage conditions and contaminated with fumonisins. Therefore, determining Fusarium spp. and fumonisins in wheat grains is of prime importance to develop suitable management strategies and to minimize risk. Eighty-two stored wheat samples produced in Iran were collected from various supermarkets and tested for the presence of Fusarium spp. by agar plate assay and fumonisins by HPLC. A total of 386 Fusarium strains were isolated and identified through morphological characteristics. All these strains belonged to F. culmorum, F. graminearum, F. proliferatum and F.verticillioides. Of the Fusarium species, F. graminearum was the most prevalent species, followed by F. verticillioides, F. proliferatum and then F. culmorum. Natural occurrence of fumonisin B1 (FB1) could be detected in 56 (68.2%) samples ranging from 15-155 μg/kg, fumonisin B2 (FB2) in 35 (42.6%) samples ranging from 12-86 μg/kg and fumonisin B3 (FB3) in 26 (31.7%) samples ranging from 13-64 μg/kg. The highest FB1 levels were detected in samples from Eilam (up to 155 μg/kg) and FB2 and FB3 in samples from Gilan Gharb (up to 86 μg/kg and 64 μg/kg).
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Keywords

bread wheat
 
cluster analysis
 
drought tolerance
 
drought tolerance genotypes
 
grain yield
 
highest performance
 
Kermanshah
 
Positive significant correlation coefficient
 
randomized complete block design
 
replications
 
research station
 
soluble sugar
 
total protein