Volume 9, Issue 1 (2007)                   JAST 2007, 9(1): 55-60 | Back to browse issues page

‎ 20.1001.1.16807073.2007.9.1.2.7

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Arzani A, Lapitan N L V. Genetic Variation for Resistance to Russian Wheat Aphid in F2-Derived Families of Wheat (Triticum aestivum L.). JAST 2007; 9 (1) :55-60
URL: http://jast.modares.ac.ir/article-23-5323-en.html
Genetic Variation for Resistance to Russian Wheat Aphid in F2-Derived Families of Wheat (Triticum aestivum L.)
A. Arzani * 1, N. L. V. Lapitan2
1- Agronomy and Plant Breeding Department, College of Agriculture, Isfahan University of Technology, Isfahan, 84155, Islamic Republic of Iran.
2- Soil and Crop Sciences Department, Colorado State University, Fort Collins, CO 80523, U.S.A.
Abstract:   (6132 Views)
The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), is a significant insect pest of wheat worldwide. The objective of this study was to assess the genetic variation within and between F2-derived families for reaction to RWA using F3 and F4 families originating from individual F2 plants of a cross between the susceptible line (synthetic hexaploid-11) and the resistance cultivar (‘Halt’). The RWA damage of individual plants within each family was measured using different procedures. Their reaction types were combined into a single data for each individual family (derived from an individual F2 plants) and subjected to statistical analysis. Results indicated that the genetic variation between F2-derived families is greater than within F2-derived families for RWA resis-tance. Broad-sense heritability of RWA resistance, calculated by partitioning phenotypic variation into genetic and environmental components, was 73.2%. A narrow-sense herita-bility estimate of 30% was obtained for the RWA resistance in the ‘Halt’ synthetic hexaploid-11 cross using parent-offspring (F3: F4) regression procedure.
Keywords: Wheat, Genetic variation, heritability, Insect resistance, Russian wheat aphid
Full-Text [PDF 84 kb]   (4866 Downloads)    
Subject: Plant Breeding
Received: 2010/01/30 | Accepted: 2010/01/30 | Published: 2010/01/30
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