The aim of this study was to determine nature and extent of variability parameters and their utilization in barley breeding programme. A total of 45 F1s along with their parents and F2 populations were evaluated in a randomized block design with 3 replications during Rabi (winter season) 2014. The various traits measured were days to 50% flowering, days to maturity, plant height, flag leaf area, upper leaf area, tillers-plant, spikes-plant, spike length, grains-spike, spike weight, grain weight-spike, spike harvest index, 1000 grain weight, biological yield-plant, grain yield-plant (g), harvest index, grain size, husk content and protein content. Results showed that significant variation was observed for all the traits studied in the entire gene pool. The degree of genotypic and phenotypic coefficient of variation was high for tillers-plant, spike-plant, grain yield-plant, flag leaf area, harvest index, 1000 grain weight, grain weight-spike, upper leaf area and husk content. High heritability coupled with high genetic advance was recorded for tillers-plant, spikes-plant, grain yield-plant, flag leaf area, harvest index, grain weight-spike, upper leaf area, husk content, grain size and plant height suggesting that these traits are highly heritable and governed by additive gene action. Moderate heritability coupled with high genetic advance was observed for 1000 grain weight, biological yield-plant, spike length, protein content, grains-spike and spike weight; however, days to 50% flowering and days to maturity had moderate heritability coupled with low genetic advance suggesting preponderance on non-additive gene action in the inheritance of these traits. It could be concluded that
Bennett, M.D. and Smith, L.B. (1976) Nuclear DNA Amounts in Angiosperms. Philosophical Transactions of the Royal Society (London) B Biological Sciences, 274, 227-274. http://dx.doi.org/10.1098/rstb.1976.0044
Behall, K.M., Scholfield, D.J. and Hallfrisch, J. (2004) Diets Containing Barley Significantly Reduce Lipids in Mildly Hypercholesterolemic Men and Women. American Journal of Clinical Nutrition, 80, 1185-1193.
Wang, J., Zhou, M., Huang, Z., Lu, C. and Xu, R. (2006) Genetic Analysis of Quantitative Traits of a Doubled Haploid Population in Barley. Journal of Yang Zhou University (Agriculture and Life Sciences), 3, 65-69.
Singh, S.K., Sirchi, A., Kerkhi, A.S., Singh, O., Kumar, V., Singh, A., Singh, S.P. and Singh, R.P. (2008) Genetic Variability in Components for Grain Yield in Barley (Hordeum vulgare L.). Environment and Ecology, 26, 2379-2381.
Jalata, Z., Ayana, A. and Zeleke, H. (2011) Variability, Heritability and Genetic Advance for Some Yield and Yield Related Traits in Ethiopian Barley (Hordeum vulgare L.) Landraces and Crosses. Intenational Journal of Plant Breeding and Genetics, 5, 44-52. http://dx.doi.org/10.3923/ijpbg.2011.44.52
Tazeen, M., Nadia, K. and Farzana, N.N. (2009) Heritability, Phenotypic Correlation and Path Coefficient Studies for Some Agronomic Characters in Synthetic Elite Lines of Wheat. Journal of Food Agriculture and Environoment, 7, 278-282. http://world-food.net/heritability-phenotypic-correlation-and-path-coefficient-studies-for-some-agronomic-characters-in-synthetic-elite-lines-of-wheat/
Singh, A.P. (2011) Genetic Variability in Two-Rowed Barley (Hordeum vulgare L.). Indian Journal of Scientific and Research, 2, 21-23. http://indianjournals.com/ijor.aspx?target=ijor:ijsr1&volume=2&issue=3&article=004
Al-Tabbal, J.A. and Al-Fraihat, A.H. (2012) Genetic Variation, Heritability, Phenotypic and Genotypic Correlation Studies for Yield and Yield Components in Promising Barley Genotypes. Journal of Agriculture Science, 4, 193-210.
Muhammad, R.W., Qayyum, A., Liaqat, S., Hamza, A., Yousaf, M.M., Ahmad, B., Shah, J., Hussain, M., Ahsan, A.N., Qurashi, S.H. and Noor, E. (2012) Variability, Heritability and Genetic Advance for Some Yield and Yield Related Traits in Barley (Hordeum vulgare L.) Genotypes in Arid Conditions. Journal of Food, Agriculture & Environment, 10, 626-629. http://world-food.net/download/journals/2012-issue_3&4/69.pdf
Akanksha, Sirohi, A., Kumar, S., Kant, S., Pal, K., Kumar, A. and Singh, M. (2012) Genetic Improvement through Variability, Heritability and Genetic Advance in Barley Crop (Hordeum vulgare L.). Environment and Ecology, 30, 1343-1345.
Dyulgerova, B. and Valcheva, D. (2014) Heritability, Variance Components and Genetic Advance of Yield and Some Yield Related Traits in Barley Doubled Haploid Lines. Turkish Journal of Agricultural and Natural Sciences, 1, 614-617.
Addisu, A. and Shumet, T. (2015) Variability, Heritability and Genetic Advance for Some Yield and Yield Related Traits in Barley (Hordeum vulgare L.) Landraces in Ethiopia. Intenational Journal of Plant Breeding and Genetics, 9, 68-76. http://dx.doi.org/10.3923/ijpbg.2015.68.76
Aynewa, Y., Dessalegn, T. and Bayu, W. (2015) Correlation and Genetic Variability Estimate of Malt Barley (Hordeum vulgare L.). International Journal of Advanced Research in Biological Sciences, 2, 79-85.
Lush, J.L. (1949) Heritability of Quantitative Traits in Farm Animals. Proceeding of 8th International Congess on Genetics, Heriditas (Supplement), 35, 356-375. http://dx.doi.org/10.1111/j.1601-5223.1949.tb03347.x
Dudly, J.W. and Moll, H. (1969) Interpretation and Use of Estimates of Heritability and Genetic Variance in Plant Breeding. Crop Science, 9, 257-267. http://dx.doi.org/10.2135/cropsci1969.0011183X000900030001x