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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 4
First page : (651) Last page : (662)
Article doi: http://dx.doi.org/10.18782/2320-7051.2638

Variability Parameters in Wheat- A Review

Gazala H. Khan1, Asif B. Shikari2, Shabir H. Wani3* and Rakesh Vaishnavi1
1Division of Genetics and Plant Breeding
2Centre for Plant Biotechnology 3MRCFC, Khudwani
Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir
Shalimar, Srinagar, J&K, India, 190 025
*Corresponding Author E-mail: shabirhwani@skuastkashmir.ac.in
Received: 26.02.2017  |  Revised: 5.03.2017   |  Accepted: 7.03.2017  


Wheat is an immensely important cereal crop of the world. At global level India ranks as second largest wheat producing country, contributing about one-tenth of the global wheat production. Introduction, evaluation and identification of potentially useful germplasm forms the first and foremost step in a crop improvement programme. Genetic variability existing in nature or created through crop breeding is of immense value for crop improvement programmes. Genetic variability in a population can be partitioned into heritable and non-heritable variation with the aid of genetic parameters such as variance, genotypic coefficient of variation, heritability and genetic advance, which serve as a basis for selection of some outstanding genotypes from existing ones Heritability is the ratio of genetic variance to total variance for a plant trait and is related with progress from selection It expresses the extent to which phenotypes are determined by the genes transmitted from parents. Similarly Knowledge of the association of quantitative characters specifically for yield and its attributes is of immense practical value during selection. The selection of one character will lead to indirect change(s) of other character(s) if the two are correlated. Therefore, the knowledge of phenotypic and genotypic correlation and path analysis is important for a plant breeder. Path coefficient analysis measures the direct and indirect effects of various characters.
Keywords: Wheat, Heritability, Correlation, Path coefficient.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Khan, G.H., Shikari, A.B., Wani, S.H. and Vaishnavi, R., Variability Parameters in Wheat- A Review, Int. J. Pure App. Biosci.5(4): 651-662 (2017). doi: http://dx.doi.org/10.18782/2320-7051.2638