Generation mean analysis for forage yield and quality in Kenaf


1 Department of Biological Sciences, Bushehr branch, Islamic Azad University, Bushehr, Iran.

2 Department of Crop Science, Faculty of Agriculture, Universiti Putra Malaysi, 43400 Serdang, Selangor, Malaysia.

3 Department of Seed and Plant Production and Breeding Research, Agricultural and Natural Resources Research Center, Golestan, Iran.

4 Faculty of Technical and Vocational Studies, Sultan Edris Education University (UPSI), 35900, Tanjong Malim, Perak, Malaysia.

5 Department of Agriculture, Firoozabad Branch, Islamic Azad University, Postal code: 74719-13113, Firoozabad, Iran.

6 Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.

7 Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.


The objective of this study was to estimate heritability, heterosis, and genetic parameters involved in the control of forage yield and quality in kenaf populations, using analysis of generation means. Two crosses were used; Cuba 2032×Accession 75-71 and IX51×Everglade 41. Experimental material comprised of P1 and P2, their F1 and F2 and BC1P1 and BC1P2 generations. The effects of generations were significant for all traits in both crosses. Results revealed that both additive and non-additive effects were important for the inheritance of the traits in both crosses. The additive gene effects had a higher contribution than dominance gene effects, for most of the traits in cross 1, while dominance gene effects had a greater contribution than additive gene effects, for most of the traits in cross 2. Broad-sense heritability was high for the majority of traits in two crosses, while narrow-sense heritability was higher in cross 1 than in cross 2 for all traits. In cross 2, heterosis estimates were higher than those of cross 1 for most of the traits. Thus, selecting the segregating generations would lead to a significant improvement for forage yield. 


Abd-El M., Ehab M. R. M., and Ali M. M. (2010). Genetic analysis of yield and its component of some Egyptian cotton varieties. Word Journal of Agriculture and Sciences,5(6): 615–621.
Adeniji O. T., and Kehinde O. B. (2003). Inheritance of pod and seed yield characters in West African okra (Abelmoschus Indian Journal of Genetics caillei): Generation mean analysis. Nigerian Journal of Genetics,18: 1–4.
Agarwal M., and Shrotria P. K. (2005). Heterosis and inbreeding depression in forage sorghum [Sorghum bicolor (L.) Moench]. The Indian Journal of Genetics and Plant Breeding, 65(1): 12–14.
Ahmad R. T. (2009). Genetic basis of drought tolerance in cotton(Gossypium hirsutum). Ph.D. Thesis. Univ. of Agriculture, Faisalabad, Pakistan.
Azizi F., Rezai A., and Saeidi G. (2006). Generation mean analysis to estimate genetic parameters for different traits in two crosses of corn inbred lines at three planting densities. Journal of Agricultural Science and Technology, 8(2): 153–169.
Behmaram R., Saleh, Gh., Foroughi M., Noori, Z., Panandam, J. M., and Harun J. (2014). Genetic control of fiber yield and quality in kenaf (Hibiscus cannabinus L.). Iranian Journal of Genetics and Plant Breeding, 3 (1): 31–41.
Bhatt A. (2008). Studies on heterosis and inbreeding depression in sorghum [sorghum bicolor (L). Moench]. Agricultural Science Digest, 28(4): 258–261.
Chalh A., and El Gazzah M. (2004). Bayesian estimation of dominance merits in noninbred populations by using Gibbs sampling with two reduced sets of mixed model equations. Journal of  Applied Genetics, 45: 331–339.
Coors J. G. (1999). Selection methodology and heterosis. In: Coors J., and Pandey S. (Ed.). Genetics and exploitation of heterosis in crops. American Society of Agronomy and Crop Science Society of America, Madison, 225–245.
Dawwam H. A., Hendawy, F. A., Esmail, R. M., and Mahros, E. S. H. (2009). Inheritance of some quantitative characters of Egyptian cotton (Gossypium barbadence L.). 6th International Plant Breeding Conference.Egypt,3–5.
Esmail R. (2007). Genetic analysis of yield and its contributing traits in two intra-specific cotton crosses. Journal of Applied Sciences Research, 3(12): 2075–2080.
Falconer, D. S. (1981). Introduction to quantitative genetics second edition. Longman, England. 340pp.
Falconer D., and Mackay, T. (1996). Heritability. Introduction to Quantitative Genetics, 160–183.
Ibrahim M. M., and Hussein R. M. (2006). Variability, Heritability and genetic advance in some genotypes of roselle (Hibiscus sabdariffa L.). Word Journal of Agriculture and Sciences, 2(3): 340–345.
Jones M. D., Puentes, C., and Suarez R. (1955). Isolation of kenaf for seed increase. Agronomy Journal, 47: 256–257.
Kearsey K., and Jinks J. L. (1968). A general method of detecting additive, dominance and epistatic variation for metrical traits Theory. Heredity, 23: 403–409.
Kearsey M. J., and Pooni H. S. (2004). The genetical analysis of quantitative traits. Chapman and Hall, London. 400p.
Liu Y. (2005). Diallel and stability analysis of kenaf (Hibiscus cannabinus L.) in South Africa. Master of Science Thesis, Univ of the Free State.
Mather K., and Jinks J. L. (1982). Introduction to Biometrical Genetics. The Study of Continuous Variation, Chapman and Hall, 396p.
Minitabm (2005). Analysis of variance. Minitab 14 Help-to-Go Field. of variance. pdf. Retrieved November 19, 2007.
Mohd Najib, M. A., Mohd Shukri H., and Wan Zahari M. (2003). Forages and feed resources in commercial livestock production systems: Kenaf (Hibiscus cannabinus L.) as animal feed. Proceedings of the 8th Meeting of The Regional Working Group on Grazing and Feed Resources For Southeast Asia Kuala Lumpur, Malaysia,September 2003, 22–28.
Nielsen D. C. (2004). Kenaf forage yield and quality under varying water availability. Agronomy Journal, 96: 204–213.
Said A. A. (2014). Generation mean analysis in wheat (Triticum aestivum L.) under drought stress conditions. Annals of Agricultural Science, 59(2): 177–184.
Sanchez D. G. R., Cruz S. C., Gil A. P., Corona J. S. S., and Wong J. A. C. (2010). Kenaf (Hibiscus cannabinus L.) forage yield and quality at three ages compared to corn and brown midrib sorghum x sudangrass. Revista Mexicana de Ciencias Pecuarias,1(1): 13–23.
Shahrokhi M., Khorasani S. Kh., and Ebrahimi A. (2011). Generation mean analysis for yield and yield components in maize (Zea mays L.). Journal of Plant Physiology and Breeding, 1(2): 59–72.
Webber C. L. (1990). The effects of kenaf cultivars and harvest dates on plant growth, protein content and dry matter yields. First Annual International Conference on New Industrial Crops and Products, 147–152.
Webber C. L. (1993). Kenaf: Production, harvesting, processing, and products. In Janick, J. and Simon, J. E. (eds.). New Crops, Wiley, New York, 416–421.
Webber C. L., Bhardwaj H. L., and Bledsoe V. K. (2002). Kenaf production: Fiber, feed, and seed. Trends in New Crops and New Uses. ASHS Press, Alexandria, VA., 327–339.
Webber C. L., and Bledsoe V. K. (2002). Kenaf yield components and plant composition. Trends in New Crops and New Uses. ASHS Press, Alexandria, VA., 348–357.