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pgr 2017, 3(2): 11-24 Back to browse issues page
Genetic Analysis of Morphological Traits in Oriental Tobacco (Nicotina tabacum L.) by Using Generation Mean Analysis
Reza Darvishzadeh , Mir Javad Mousavi Andazghi , Amir Fayyaz Moghaddam , Hossein Abbassi Holasou , Seyyed Reza Alavi
Professor Department of Plant Breeding and Biotechnology, Faculty of Agriculture, Urmia University, Urmia, Iran
Abstract:   (962 Views)
In order to evaluate heritability and gene action for some of the important quantitative traits in oriental tobacco, two genotypes, Basma 16-10 and SPT406 were crossed with Basma S. 31 cultivar, separately in 2009-2010. Parents with F1, F2, BC1 and BC2 generations were planted in a randomized complete block design with three replications. Traits such as plant height, leaf length, leaf width, leaf number, internnode number, stem diameter and yield per plant were recorded. The results obtained from analysis of variance indicated that generations mean squares were statistically significant for all traits expect for stem diameter. Therefore, generation mean analysis was performed for significant triats to estimate gene actions using Chi-square and scaling tests. The Chi-square of simple three-parametric model (additive-dominance model) was significant for studied crosses, indicating the presence of non allelic-interactions in the inheritance of these traits in oriental tobacco. Both additive and dominance genetic effects were significant for plant height, leaf length, leaf width, leaf number and internnode number. In addition, presence of high amount of dominance effect and dominance × dominance interactions suggests the importance of non-additive genetic effects for these traits in oriental tobacco. Therefore, selection for these traits in early generations can not be successful. However, additive genetic effects play an important role in the inheritance of yield, and then selection for this trait is hopeful in early generations during tobacco breeding process.
Keywords: Generation mean analysis, Genetic diversity, Morphological traits, Oriental tobacco
Full-Text [PDF 1033 kb]   (292 Downloads)    
Type of Study: Research | Subject: General
Received: 2017/05/28 | Accepted: 2017/05/28 | Published: 2017/05/28
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Darvishzadeh R, Mousavi Andazghi M J, Fayyaz Moghaddam A, Abbassi Holasou H, Alavi S R. Genetic Analysis of Morphological Traits in Oriental Tobacco (Nicotina tabacum L.) by Using Generation Mean Analysis. pgr. 2017; 3 (2) :11-24
URL: http://journals.lu.ac.ir/pgr/article-1-96-en.html


Volume 3, Issue 2 (3-2017) Back to browse issues page
مجله پژوهش های ژنتیک گیاهی Journal of Plant Genetic Research
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