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African Journal of Agricultural Research
Article . 2017 . Peer-reviewed
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Reaction of Coffea canephora clones to the root knot nematode, Meloidogyne incognita

English
Authors: Vieira Santos Anderson; Barros Rocha Rodrigo; de Freitas Fernandes Cleberson; Felipe da Silveira Silvaldo; Rostand Ramalho Andre; Roberto Vieira Junior Jose;

Reaction of Coffea canephora clones to the root knot nematode, Meloidogyne incognita

Abstract

In the Western Amazon, Brazil, Coffea canephora Pierre is the main species cultivated because it has good adaptation to the climate and soils of the region. Among the factors that limit the yield of this crop, Meloidogyne or root-knot nematode, caused by the root knot nematode, is an aggressive disease present in the state of Rondonia. The aim of this study was to evaluate the reaction of fifteen clones of C. canephora, belonging to the cultivar BRS Ouro Preto, to Meloidogyne incognita (Est I2). Therefore, six seedlings with six months of growth in a nursery from each one of the clones of the cultivar were transferred to pots containing a sterilized substrate in a greenhouse. Following the same design, three clonal genotypes selected from the cultivar IAC Apoata (C. canephora botanical variety Robusta) served as resistant controls, and seedlings of C. arabica of the Obata line and tomato (Solanum lycopersicum) cv. Santa Clara (20 days after germination) as susceptible controls, for a total of 120 pots. A 10 ml suspension containing 5000 eggs of M. incognita was inoculated on each plant, and after 150 days, they were evaluated with regards to root fresh weight (FWR), number of galls (NG), number of eggs (NE), and the nematode reproduction factor (RF = final population/initial population). Except for the clone K98M-0061, which exhibited galls (29.17), all the clones of the variety BRS Ouro Preto showed resistance at levels equivalent to those of the controls of the var. Apoata (RF <1) and good root development. Thus, it can be concluded that the total composition of clones of the variety BRS Ouro Preto is resistant to M. incognita in Rondonia. Key words: Coffee, Meloidogyne, plant selection.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Top 10%
Average
Average
gold