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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Screening tomato genotypes for adaptation to high temperature in West Africa
Acta Agriculturae Scandinavica Section B: Soil and Plant Science, Volume 63, No. 6, Year 2013
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Description
Tomato is an important vegetable widely grown in the tropics due to its nutritional value and financial benefits for farmers. In Ghana, there is an undersupply caused by production ceasing entirely from October to May due to high temperatures. Heat stress has been reported to cause excessive flower drop leading to drastic reduction in yield; however, genotypic differences in heat tolerance exist in tomato. A greenhouse experiment was conducted to screen 19 different tomato genotypes for their tolerance to heat stress. The genotypes were selected because they were the commercial varieties widely available to farmers. The average day and night temperatures recorded were 33.8°C and 25.9°C, respectively. Cultivars were evaluated for heat adaptation traits such as flower drop and number of fruits. There were highly significant differences between the genotypes for numbers of fruits per plant, ranging from 1 to 27. Fruit yield per plant ranged from 26.7 to 571.8 g. The locally developed open pollinated cultivar 'Nkansah' had the highest fruit number and fruit yield per plant, but produced the smallest sized fruits of only 25.2 g. Cultivars with large size fruits were 'Queen', 'DV 2962' and 'Wosowoso' with a combined average of 85.7 g. The first two principal components (PCs) accounted for 79.7% of total variation. The first PC had positive weights for number of flowers per truss, number of fruits per plant, total number of flowers, yield per plant and number of trusses. PC2 explained 11% of the total variability among genotypes and had positive weights for all traits except number of days to flowering and weight per fruit. The highly contrasting material on traits such as flower and fruit production under high temperatures can be used for further research to elucidate the physiological responses conferring adaptation to heat stress. © 2013 © 2013 Taylor & Francis.
Authors & Co-Authors
Kugblenu Darrah, Yvonne O.
Ghana, Accra
University of Ghana
Oppong Danso, Eric
Ghana, Accra
University of Ghana
Ofori, Kwadwo O.
Ghana, Accra
University of Ghana
Neumann Andersen, Mathias Neumann
Denmark, Aarhus
Aarhus Universitet
Abenney-Mickson, Stephen
Ghana, Accra
University of Ghana
Sabi, Edward Benjamin
Ghana, Accra
University of Ghana
Plauborg, Finn Lars
Denmark, Aarhus
Aarhus Universitet
Abekoe, Mark Kofi
Ghana, Accra
University of Ghana
Ofosu-Anim, John
Ghana, Accra
University of Ghana
Ortiz, Rodomiro Octavio
Sweden, Uppsala
Sveriges Lantbruksuniversitet
Jørgensen, Søren Thorndal
Denmark, Copenhagen
Københavns Universitet
Statistics
Citations: 29
Authors: 11
Affiliations: 4
Identifiers
Doi:
10.1080/09064710.2013.813062
e-ISSN:
16511913
Study Approach
Quantitative
Study Locations
Multi-countries
Ghana