Broad-sense heritability and variance component estimates for Pratylenchus brachyurus resistance in Brazilian soybean genotypes

Machado, Andressa Cristina Zamboni; Filho, J. V. Araújo

doi:10.1007/s40858-016-0113-5

Cited by 9 publications

(6 citation statements)

References 9 publications

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“…Genetic variability among nematodes is also an important factor and can occur both in Meloidogyne spp. and P. brachyurus (Oliveira et al, 2011;Machado & Araújo Filho, 2016). When selecting rotation crops, farmers should opt for cultivars that are more stable in their response to nematodes, such as IPR Afrodite.…”

Section: Discussionmentioning

confidence: 99%

Reaction of winter cereals to Pratylenchus brachyurus and Meloidogyne javanica

Sonda,

Futigami,

Tarini

et al. 2024

Rev. DELOS

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Winter cereals are important crops in southern Brazil. They are commonly used as cover or forage crops in rotation with soybean. Although it is well known that winter cereals enhance soil properties, their susceptibility to nematodes has been little investigated. This study aimed to assess the response of oat, barley, and wheat cultivars to Pratylenchus brachyurus and Meloidogyne javanica. Plants were inoculated with 500 P. brachyurus or 2000 eggs + second-stage juveniles of M. javanica, and soybean was used as control. After 80 (P. brachyurus) or 60 (M. javanica) days of inoculation, plants were evaluated for root fresh weight, total nematode number, nematode population density, and reproduction factor (RF). All oat, barley, and wheat cultivars reduced P. brachyurus population in relation to the control and were resistant to the nematode (RF < 1). The RF of P. brachyurus on the control was 8.7, 5.3, and 7.9 in experiments with oat, barley, and wheat, respectively. Oat and wheat cultivars were resistant to M. javanica and reduced root-knot nematode reproduction. Barley cvs. Imperatriz, IFAPAC 2015227, IFAPAC 2012069, ANA 02, and ANAG 01 were resistant to the nematode. The RF of M. javanica on soybean was 3.4, 29.5, and 22.5 in experiments with oat, wheat, and barley, respectively. It is concluded that winter crops can be grown in areas with nematodes but requires planning in the choice of cultivar.

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Section: Discussionmentioning

confidence: 99%

Reaction of winter cereals to Pratylenchus brachyurus and Meloidogyne javanica

Sonda,

Futigami,

Tarini

et al. 2024

Rev. DELOS

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“…Another major drawback in terms of the potential use of host plant resistance in SSA countries is the lack of information about the host status of soybean cultivars to infection by lesion nematode species. The same situation applies to Brazil, where soybean crops are adversely affected by P. brachyurus without any resistant sources being identified to date [113,115,116]. However, some soybean genotypes (BRSGO Chapadões, BRSGO Paraíso, M-Soy 7211 RR, M-Soy 8008 RR, Emgopa 313 RR, M-Soy 8411, BRSGO Juliana RR, Emgopa 316 RR, BRSGO Luziânia RR, and TMG 103 RR) were found to reduce P. brachyurus densities [117].…”

Section: Host Plant Resistancementioning

confidence: 99%

“…Biological control is a management strategy to combat PPN and refers to the use of live microbial agents to reduce population densities of target nematode pests [89]. The use of bacterial and fungal strains is an alternative management strategy for root-knot and lesion nematode infections [121,122] and can reduce the damage done to economically important crops like soybean (Table 3 [115,[123][124][125][126]. Bacillus spp.…”

Section: Biological Controlmentioning

confidence: 99%

South Africa: An Important Soybean Producer in Sub-Saharan Africa and the Quest for Managing Nematode Pests of the Crop

et al. 2020

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With an increase in the global population, a protein-rich crop like soybean can help manage food insecurity in sub-Saharan Africa (SSA). The expansion of soybean production in recent years lead to increased land requirements for growing the crop and the increased risk of exposing this valuable crop to various pests and diseases. Of these pests, plant-parasitic nematodes (PPN), especially Meloidogyne and Pratylenchus spp., are of great concern. The increase in the population densities of these nematodes can cause significant damage to soybean. Furthermore, the use of crop rotation and cultivars (cvs.) with genetic resistance traits might not be effective for Meloidogyne and Pratylenchus control. This review builds on a previous study and focuses on the current nematode threat facing local soybean production, while probing into possible biological control options that still need to be studied in more detail. As soybean is produced on a global scale, the information generated by local and international researchers is needed. This will address the problem of the current global food demand, which is a matter of pressing importance for developing countries, such as those in sub-Saharan Africa.

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“…In this way, the management of the root-knot nematodes can be performed through oat cultivation that can reduce the nematode population preventing their penetration and multiplication in the roots (Borges et al, 2009). Thus, the use of resistant cultivars has been considered as the most practical, efficient and economical measure for the management of nematodes (Machado and Araújo Filho, 2016;Mukhtar et al, 2017). Although many oat genotypes, classified as resistant, may reduce the population of root-knot nematodes, their reaction to nematodes mainly depends on: (i) the genetic variability of the genotypes, (ii) the variability of the nematode populations, and (iii) their population in cultivated areas.…”

Section: Genotypesmentioning

confidence: 99%

Reaction of Avena spp. to different concentration levels of Meloidogyne javanica and M. incognita inoculum

et al. 2020

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The objective of this study was to evaluate the resistance reaction of Avena spp. after inoculation of different concentrations of eggs and juveniles of M. javanica and M. incognita. Ten oat genotypes (Avena sativa: UPFPS Farroupilha, UPFA Ouro, IPR Afrodite, AF1345 Ucraniana; A. strigosa: Agro Quaraí, Agro Esteio, Embrapa 139, Iapar 61 Ibiporã, UPFA 21 Moreninha, AF 12202) were evaluated in bioassays for resistance against the root-knot nematodes, Meloidogyne javanica and M. incognita. Susceptible (Solanum lycopersicum and Glycine max) and resistant (Crotalaria spectabilis) species were used as control treatments. Depending on the inoculum level, the oats showed a different response to nematodes. All genotypes of oats were resistant to M. javanica when a high inoculum level (5,000 eggs and J2 per plant) was used but under low inoculum level (1,500 eggs and J2 per plant), AF 12202, Iapar 61 Ibiporã, Agro Esteio and Agro Quaraí were susceptible. All genotypes of oats were resistant to the inoculation of 2,900 eggs and J2 of M. incognita, except for ‘Iapar 61’ that showed susceptibility in this concentration. At lower inoculum level (1,500 eggs and J2) Agro Quaraí, Agro Esteio and Iapar 61 Ibiporã were susceptible. The reaction of oats to M. javanica and M. incognita depends on the inoculum level. The resistance reaction at low inoculum density of A. sativa ‘AF 1345 Ucraniana’ and ‘IPR Afrodite’ allows its use in breeding programs in oats and suggests the possibility of management tool in areas infested with both root-knot nematode species.

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Broad-sense heritability and variance component estimates for Pratylenchus brachyurus resistance in Brazilian soybean genotypes

Cited by 9 publications

References 9 publications

Reaction of winter cereals to Pratylenchus brachyurus and Meloidogyne javanica

Reaction of winter cereals to Pratylenchus brachyurus and Meloidogyne javanica

South Africa: An Important Soybean Producer in Sub-Saharan Africa and the Quest for Managing Nematode Pests of the Crop

Reaction of Avena spp. to different concentration levels of Meloidogyne javanica and M. incognita inoculum

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