DIALLEL ANALYSIS FOR SOME QUANTITATIVE CHARACTERS IN KENAF (Hibiscus cannabinus L.) | ||||
| Journal of Plant Production | ||||
| Article 5, Volume 32, Issue 3, March 2007, Page 1649-1658 PDF (657.67 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jpp.2007.206708 | ||||
 View on SCiNiTO | ||||
| Author | ||||
| Amany M. M. El-Refaie* | ||||
| Fiber Crops Res. Section, Field Crops Res .Inst., A.R.C. | ||||
| Abstract | ||||
| This study was conducted with the objective of estimating combining ability and gene action for fiber weight / plant and its related characters in kenaf. This was achieved via evaluating six parents {P1(S.105/2), P2(S.158/4/2/5), P3(S.103/4), P4(S.40), P5 (Cuba) and P6 (New Indian)} and their 15 F1,s progenies which were evaluated in a randomized complete block design with three replications at Ismailia Agric. Res. Station Farm, Ismailia Governorate, Egypt. The ratio of general to specific combining ability variance for all characters under study, indicated that additive genetic effects were more important than non-additive genetic effects. These results revealed that the inheritance of these traits was mainly controlled by additive effects of genes. Therefore, selection should be possible within the F2 and subsequent populations for these characters. P5 (Cuba) exhibited significant positive GCA effects for fiber weight and most of its components as well as P1 (S.105/2) and P6 (New Indian) for green weight / plant, indicating that the use of these parents in kenaf breeding programs could increase green weight and consequent increasing fiber weight / plant. Concerning seed weight / plant, results indicated that P1 (S.105/2 ) followed by P3 (S.103/4) showed significant positive ĝi values. Therefore, it could be concluded that these two parents appeared to be the best combiners for seed weight. Simple correlation between GCA values and parental means for all studied characters were significantly positive. These results indicated that, the parents showing higher mean performance proved to be the highest general combiners for these traits. One cross (P5´P6) showed significant positive SCA effects for fiber weight and most related characters (plant height, technical stem length and green weight / plant) expect for fiber percentage and fiber percentage. In the meantime, the cross P1´P5 revealed significant positive SCA for some important characters i.e., green weight per plant, technical length and fiber weight per plant. These crosses involved high x low general combiners for these traits. Simple correlation between cross means and their SCA values was significant positive for all characters except fiber percentage and stem diameter. Therefore, the choice of promising cross combination would be based on SCA effects or mean performance of the crosses. Phenotypic (rp < /sub>) and genotypic (rg) correlation coefficients concluded that plant height, technical stem length, fiber percentage and fiber length / plant are the major components contributing to fiber weight / plant in kenaf. Therefore, selection for these traits will improve fiber yield in kenaf. | ||||
| Keywords | ||||
| Combining ability; Gene action; Correlation; Kenaf | ||||
|
Statistics Article View: 42 PDF Download: 134 |
||||
