Resistance to Callosobruchus maculatus Developed Via Gamma Radiation in Cowpea

Langa Tembo, Lawrent Pungulani, Philemon H. Sohati, Juliet C. Mataa and Kalaluka Munyinda
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Langa Tembo: University of Zambia, Department of Plant Science Box 32379 Lusaka, Zambia
Lawrent Pungulani: Department of Agricultural Research Stations, Lilongwe Malawi
Philemon H. Sohati: University of Zambia, Department of Plant Science Box 32379 Zambia
Juliet C. Mataa: Zambia Agricultural Research Institute, Private bag 1, Chilanga, Zambia
Kalaluka Munyinda: University of Zambia, Department of Plant Science Box 32379 Lusaka, Zambia

Journal of Agriculture and Crops, 2017, vol. 3, issue 8, 65-71

Abstract: Among the biotic stresses that affect cowpea (Vigna unguiculata L) productivity, infestation by cowpea bruchid beetles (Callosobruchus maculatus) is a major problem, causing yield losses of up to 100 %. To alleviate this problem, use of resistant varieties is a feasible approach for small-scale farmers. In Zambia, there are no reported sources of resistance to C. maculatus. The objectives of this study were: i) to evaluate certain cowpea mutants, generated at the University of Zambia, for resistance to C. maculatus; ii) to cluster the tested genotypes based on height, number of pods per plant, 100-seed weight, yield ha-1, number of eggs laid and adult emergence; and iii) to evaluate the candidate mutants for protein content. Experiments were conducted at three locations in 2014/15. The mutants, LT 11-5-2-2, BB 7-9-7-5 and BB-14-16-22, were found to be resistant to C. maculatus across locations and they out-performed their respective parents (p

Keywords: Bruchid; cluster analysis; mutations; protein; Vigna unguiculata. (search for similar items in EconPapers)
Date: 2017
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