Genetic variability of <i>Meloidogyne paranaensis</i> populations and their aggressiveness to susceptible coffee genotypes

Santos, Marcilene dos; Correa, Valdir R.; Peixoto, José Ricardo; Mattos, Vanessa S.; Silva, J. G. P.; Moita, A. W.; Salgado, Sônia M. L.; Castagnone‐Sereno, Philippe; Carneiro, R. M. D. G.

doi:10.1111/ppa.12718

Cited by 18 publications

(31 citation statements)

References 26 publications

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“…(1) 2Coffee Science, 15:e151708, 2020 susceptibility of these clones. The use of susceptible clones is also important to check on the inoculum's virulence, understood as the pathogen's ability to multiply within the host (Lima et al, 2015;Peres et al, 2017;Santos et al, 2018b). These results are similar to those obtained by Santos et al (2017; who observed reproduction factor averages of 0.36 and 1.59 in different experiments evaluated in Western Amazonia.…”

Section: Resultssupporting

confidence: 85%

Resistance of new Coffea canephora clones to root-knot nematode (Meloidogyne incognita) in the western amazon

Rudnick

Junior

Fernandes

et al. 2020

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Root-knot disease is among the main diseases affecting coffee crop. The plant selection to the development new resistant cultivars is among one the most efficient methods of control. The present work aimed to quantify the resistance responses of Coffea canephora clones to root-knot nematode Meloidogyne incognita in the Western Amazon. For this, 17 previously selected clones were evaluated in three experimental trials, carried out in the municipalities of Ji-Paraná and Porto Velho, Rondônia. The resistance to root-knot nematodes M. incognita were evaluated by the numbers of gall in the roots (NG) and by the reproductive factor (RF). The resistance response was also interpreted according the genetic diversity of the clones based in their morphological traits. The clones BRS3210, C12, BRS2314, BRS3137 and BRS1216 are resistant to M. incognita with RF of 0.34, 0.62, 0.79, 0.86 and 0.98, respectively. BRS3213, C125, C15, BRS2336, BRS3220 and C09 clones were classified as susceptible, with RF of 1.93, 1.95, 2.00, 2.31, 2.32 and 2.35. The BRS3193, C160 and BRS2357 clones were classified as very susceptible, with RF values of 3.03, 4.41 and 5.82, respectively. The clustering based on the genetic diversity of morphological traits indicated that genotypes more similar to the Robusta botanic variety had lower RF. The hybrid plants showed intermediate degrees of resistance indicating the segregation for the character of the M. incognita resistance. The clones BRS3210, C12, BRS2299, BRS2314, BRS3137 and BRS1216 expressed resistance responses to M. incognita with potential for growing resistant genotypes in the Western Amazon.

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Section: Resultssupporting

confidence: 85%

Resistance of new Coffea canephora clones to root-knot nematode (Meloidogyne incognita) in the western amazon

Rudnick

Junior

Fernandes

et al. 2020

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“…This difference in the value of the RF may be related to the physiological differences in the nematode aggressiveness. Santos et al (2018) demonstrated that among M. paranaensis populations, there are differences in pathogenicity.…”

Section: Discussionmentioning

confidence: 99%

“…The genotypes MG 0179‐1R1‐776 and MG 0179‐3R1‐151, from the breeding programme of EPAMIG, were selected because of their resistance to M. paranaensis (Peres et al, 2017). The commercial cultivar Catuaí Amarelo IAC 62 was used as a susceptible control, and the commercial cultivar IPR‐100, which is derived from a cross between C. arabica × C. liberica and has resistance genes inherited from C. liberica , was used as a resistant control (Sera et al, 2017; Santos et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Pasqualotto

Salgado

Terra

et al. 2020

Journal of Phytopathology

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Climate change greatly influences coffee production, especially in areas infested with plant‐parasitic nematodes. In this study, coffee genotypes showed differences in their morphological and physiological characteristics when subjected to a water deficit and parasitism by Meloidogyne paranaensis. The cultivar IPR 100 had the largest superficial and volumetric root system area, even when parasitized. The two progenies (MG 0179‐1 and MG 0179‐3) and the cultivar Catuaí IAC 62 had a similar surface area (p < .05) when parasitized. However, the root surface area and volume of MG 0179‐3 increased by 96% and 400%, respectively, when parasitized by M. paranaensis. On the other hand, Catuaí IAC 62 had a 31% reduction in root surface area. Catuai 62 and IPR 100 showed higher sensitivity to drought when parasitized because of the increased photochemical sensitivity and reduction in photochemical quenching. In MG 0179‐1 and MG 0179‐3, an increase in non‐photochemical quenching occurred in response to stress, indicating that these progenies use a photochemical response to protect photosystem II. In this work, MG 0179‐3, which is resistant to M. paranaensis, was remarkable because, interestingly, the infestation caused an increase in its root surface area. In addition, MG 0179‐3 had relatively good photochemical performance under water deficit and M. paranaensis parasitism.

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“…Among several species that parasitize coffee plants, Meloidogyne paranaensis (Carneiro et al, 1996) is especially important, hindering plant growth and causing losses of approximately 35% in yield (Lopez-Lima et al, 2015). The damage can be even higher depending on the level of attack and on the genetic variability within nematode population (Santos et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Resistance of Conilon coffee cultivar Vitoria Incaper 8142 to Meloidogyne paranaensis under field conditions

et al. 2019

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Meloidogyne paranaensis is responsible for considerable losses in coffee production. Because of the distribution of this species in the main Coffea arabica producing regions, there is a need for management practices to ensure the sustainability of coffee production. In this work, we evaluated the agronomic performance of resistant clones of the Conilon coffee cultivar Vitoria Incaper 8142 in areas infested by M. paranaensis in the west region of Minas Gerais, Brazil. Clones 2V, 3V, and 6V presented the lowest number of nematodes per gram of roots and were considered resistant to M. paranaensis. All other clones were considered tolerant to this nematode, and one had good vegetative growth but allowed nematode reproduction. Clones of Vitoria Incaper 8142 of C. canephora represent an alternative to coffee production in areas infested by M. paranaensis including areas traditionally cultivated with C. arabica.

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Genetic variability of Meloidogyne paranaensis populations and their aggressiveness to susceptible coffee genotypes

Cited by 18 publications

References 26 publications

Resistance of new Coffea canephora clones to root-knot nematode (Meloidogyne incognita) in the western amazon

Resistance of new Coffea canephora clones to root-knot nematode (Meloidogyne incognita) in the western amazon

Root morphology, gas exchange and chlorophyll fluorescence of coffee cultivars and progenies are altered by Meloidogyne paranaensis infestation and water deficit

Resistance of Conilon coffee cultivar Vitoria Incaper 8142 to Meloidogyne paranaensis under field conditions

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