Phenotypic Characterization and the Resistance of Local Peanuts from West Nusa Tenggara to Bacterial Wilt Disease [Ralstonia solanacearum]

Eka Widiastuti, Muji Rahayu, Fitria Zulhaedar

Abstract


West Nusa Tenggara Barat has local peanuts that can be used as a source of germplasm, i.e. Bima, Pelat, and Lombok Utara. The productivity of peanut is greatly influenced by the attack of pests/diseases, like bacterial wilt disease. Bacterial wilt is one of the major diseases that can reduce peanut production up to 60% and one of the control mechanisms that can be used is local varieties that are resistant to bacterial wilt disease. This research aimed to evaluate the resistance of local peanut from West Nusa Tenggara to bacterial wilt disease (Ralstonia solanacearum) and to characterize the phenotype of the peanuts. The field research was conducted in the Genetic Resources Field Collection located in Narmada Experimental Field, on January until April 2016. The research method used was randomized complete block design (RCBD) single factorial with 9 replications, thus totally 27 plots were used. Three varieties of peanuts were evaluated, i.e two local varieties (Pelat Sumbawa and Lokal KLU) and Kelinci variety as control. The results showed that the pods and seeds were the main traits that distinguish Lokal KLU and Pelat varieties. The Lokal KLU had medium size pods with a weight of 100 seeds of 48.96 g, while Pelat and Kelinci had very large pod sizes with a weight of 100 seeds of 42.45  and 32.92 g, respectively, thus they were a potential high yielding plants. Lokal KLU had resistance to bacterial wilt compared to Kelinci that was medium resistant and Pelat that was susceptible to bacterial wilt disease.


Keywords


Local peanuts of West Nusa Tenggara; bacterial wilt; Pelat; Ralstonia solanacearum

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References


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DOI: http://dx.doi.org/10.21082/blpn.v25n1.2019.p1-12

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