Kenaf (Hibiscus cannabinus L.) is an important fiber crop world wide, and has a great
potential for its multipurpose uses. It could play a significant role in future fiber supply
in Southern Africa.
Six diverse cultivars were selected from 14 genotypes as parental lines and crossed
in a full-diallel method. The parental lines and 30 F1 hybrids were assessed and
various traits were measured. General combining ability (GCA) was lower than
specific combining ability (SCA). This indicated that non-additive genetic effects were
more important for the inheritance of those characteristics. High heritability in the
broad sense was recorded for the yield related characteristics (FPM, DPM, PH, BD,
MD).
Heterosis was widely expressed in the F1 generation. Many crosses showed both
mid-parent and high-parent heterosis for the yield characteristics (FPM, DPM, PH,
BD, MD). It can be concluded that a hybrid breeding program could effectively
improve kenaf yield.
Nine kenaf cultivars were evaluated for stability in two locations across two years.
Highly significant differences were observed between the locations and years for
fresh yield, defoliated yield and dry yield. The location under irrigated conditions had
a higher yield value than under dry land conditions. Genotype x environment
interaction was significant in this study.
Four different types of stability parameters and correlation analyses were used to
evaluate kenaf cultivar stability. In the combined analysis, El Salvador and
Everglades 41 were the cultivars that tended to have highest dry yield in the various
environments. Tainung 2 was the most unstable cultivar for the measured
characteristics.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ufs/oai:etd.uovs.ac.za:etd-09012006-072629 |
| Date | 01 September 2006 |
| Creators | Liu, Yoguo |
| Contributors | Prof MT Labuschagne |
| Publisher | University of the Free State |
| Source Sets | South African National ETD Portal |
| Language | en-uk |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.uovs.ac.za//theses/available/etd-09012006-072629/restricted/ |
| Rights | unrestricted, I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to University Free State or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. |
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