International Journal of Agricultural Policy and Research
Vol.2 (1), pp.016-025, January 2014
Article 13/ID/ JPR115, 010 pages
Copyright © 2014 Author(s) retain the copyright of this article. Author(s) agree that this article remain permanently open access under the terms of the Creative Commons Attribution License 3.0 International License
Original Research Paper
Broad-sense heritability estimation and correlation among sugarcane (Saccharum spp. hybrids) yield and some agronomic traits in western Kenya
Accepted 27 November,2013
Japheth Embeywa Jamoza1*, James Owuoche2, Oliver Kiplagat3 and Wilson Opile3
1Crop Development Department,Kenya Sugar Research Foundation,P.O. Box 44 Kisumu,Kenya.
2Crops Department,Egerton University,P.O. Box 536, Egerton,Kenya.
3School of Agriculture and Biotechnology,Moi University P.O. Box 1125, Eldoret,Kenya.
*Corresponding Author Email: firstname.lastname@example.org
Genetic improvement of sugarcane (Saccharum spp. hybrids) yield is crucial in the improvement of crop productivity. The objectives of this study were to estimate broad sense heritability and phenotypic and genetic correlations among sugarcane yield components. Thirteen sugarcane clones and one cultivar were evaluated in randomized block design in three locations in western Kenya. The study was conducted in plant and first ratoon crops. Significant (p = 0.05) differences among the genotypes for all the traits were observed. Genotype × location (G ×L) interactions were significant (p = 0.01) for stalk height, stalk weight and cane yield. High broad sense heritability (h2) was detected for stalk diameter (0.928), number of millable cane (0.912), single stalk weight (0.907) and number of internodes (0.907) indicating that these traits could be selected for easily. Highest expected genetic gains were recorded in stalk weight (34%) and number of millable cane (26.7%). Except number of internodes, all traits had low to moderate genetic correlations (rg = -0.299 to 0.586) with cane yield. On average genetic correlations were higher than phenotypic correlations. The study suggests that evaluation of sugarcane clones in many locations as opposed to crop years would be satisfactory. In view of their high GCV, broad sense heritability and expected genetic advance, a selection strategy based on single stalk weight and number of millable cane could lead to improvement in cane yield.
Key words: Heritability, genetic correlation, genetic advance, sugarcane