Cotton (Gossypium hirsutum) is a globally important fibre crop. The cottonseed has a
high oil and protein content and is used for human and animal consumption.
Innumerable commodities are made from cotton. Annual cultivar evaluations are
essential to compare the yield and quality obtained in different production areas, to
obtain experimental data to recommend the most suitable cultivar for a production area.
The objective of this study was to evaluate the performance of different cotton cultivars
under irrigation in South Africa. The cultivars planted from the 2003/2004 season up to
the 2005/2006 season were NuOPAL, DeltaOPAL, DeltaOpal RR, LS9219 and
SZ9314. The localities were Loskop (Mpumalanga Province), Makhathini (KwaZulu-
Natal), Rustenburg (North-West Province), Vaalharts and Upington (Northern Cape)
and Weipe (Limpopo Province). The Additive Main Effects and Multiplicative
Interaction (AMMI) statistical model was used to describe the effect of cultivar x
environment interaction on the yield of cotton planted under irrigated conditions. It is
recommended that cotton producers should plant NuOPAL, since it was selected by the
AMMI model as the best performer in respect of seed cotton yield and fibre yield (kg
ha-1) in fifteen out of eighteen environments.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:ufs/oai:etd.uovs.ac.za:etd-09202010-113426 |
| Date | 20 September 2010 |
| Creators | Pretorius, MM |
| Contributors | Dr J Allemann |
| 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-09202010-113426/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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