Variability in Reproduction of Isolates ofMeloidogyne incognitaandM. javanicaon Resistant Tomato Genotypes

Roberts, Philip A.; Thomason, I. J.

doi:10.1094/pd-70-547

Cited by 100 publications

(55 citation statements)

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“…So, parthenogenic RKN species have lower but still substantial variability exists within and between species for their host range as well as virulence/avirulence motion. A well characterized example is the revealing of virulence RKN populations on plants those carrying Mi gene after several generations (Roberts and Thomason 1986;Ogallo and McClure 1996;Molinari and Miacola 1997). Virulence populations have been previously detected from avirulent strains after repeated cultivation of resistant tomato plants under field (VerdejoLucas et al 2009) as well as greenhouse condition (Triantaphyllou 1987;Jarquin-Barberena et al 1991), indicating many RKN-virulence genes are involved.…”

Section: Genetics Of Virulence In Nematodesmentioning

confidence: 99%

How Durable is Root Knot Nematode Resistance in Tomato?

Rashid¹,

Al-Mamun²,

Uddin³

2017

Plant Breed. Biotech.

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Among the plant parasitic nematodes, root knot nematode (RKN) is the most devastating in tomato growing regions. Controlling RKN mostly relies on nematicides. Since chemical application is limited due to adverse environmental effect, alternative approaches are required. Although there are some alternatives, but resistance cultivars are getting popularity in the farmer's field because of simplicity, cost-effective and environment safety. Genes conferring resistance to RKN have already been identified followed by the introgression into elite cultivars. Currently, natural resistance genes (R genes) are used in conventional breeding programmes. Simultaneously, molecular research is going on to characterize and map the linked markers for the detected resistant phenotypes. Currently, it is a prominent threat to maintain the durability of existing R genes. However, durability of host resistance govern by co-evolution of resistance genes from plants and (a)virulence genes from nematodes. So, understanding the mechanisms underlying co-evolution is essential for the durability of R genes. Here we review the existing potential natural resistance in tomato against RKN, currently used resistance mechanisms between RKN and tomato, influential factors of durability of natural resistance genes and opportunity to get more durable resistance in tomato.

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Section: Genetics Of Virulence In Nematodesmentioning

confidence: 99%

How Durable is Root Knot Nematode Resistance in Tomato?

Rashid¹,

Al-Mamun²,

Uddin³

2017

Plant Breed. Biotech.

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“…In addition to potato aphids, Mi-1.2 also confers resistance against certain isolates of root-knot nematodes and biotypes of whitefly (B. tabaci), and the tomato psyllid (Bactericera cockerelli) (Nombela et al, 2003;Casteel et al, 2006). Mi-1.2 mediated resistance against root-knot nematodes functions through the activation of hypersensitive response (HR), which is associated with cell death at the feeding site, which results in the blockage of nematode feeding (Dropkin et al, 1969;Roberts and Thomason, 1986). In contrast, the Mi-1.2-mediated resistance to potato aphid is independent of HR (de Illarduya et al, 2003).…”

Section: Resistance Genesmentioning

confidence: 99%

Categories of Resistance to Greenbug (Homoptera: Aphididae) Biotype I in Aegilops tauschii Germplasm

Flinn

Smith

Reese

et al. 2001

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“…arenaria에는 저항성을 나타내나, M. hapla에는 저항성을 나타내지 못한다 (Barham and Winstead, 1957;Gilbert and McGuire, 1956;Roberts and Thomason, 1986). 이들 뿌리혹 선충은 Mi 저항성과 감수성 토마토 모두를 침입할 수 있으 나, 저항성 품종에서는 침입 이후에 기주의 저항성 반응(HR, hypersensitive reaction)에 의하여 선충은 feeding site를 만 들지 못하고 더 이상 병 진전이 일어나지 않는다 (Dropkin, 1969;Ho et al, 1992;Paulson and Webster, 1972).…”

Section: 균류병 및 세균병에 대한 작물의 저항성에서와 달리 선 충에 대한 저항성은 식물에 뿌리혹선충병이 발생하지 않는unclassified

“…토마토의 뿌리혹선충병 저항성 정도에 관한 국내 연구결 과로, 당근 뿌리혹선충(M. hapla)에 대하여 '강육토마토' 등 107개 품종이 감수성으로 조사되었고 (Cho et al, 1986) (Tables 1 and 2). 그리고 25개 저항성 품종의 뿌리 혹선충병 발생이 감수성 품종과 거의 차이가 없으므로 (Table 2), 이미 보고된 바와 같이 Mi 유전자는 단인자 우성 유전자임을 알 수 있었다 (Gilbert and McGuire, 1956;Roberts and Thomason, 1986). 그리고 여러 종자회사에서 뿌리혹선 충 저항성 품종으로 판매되고 있는 25개 토마토 품종들은 품종 간에 뿌리혹선충병 발생이 거의 차이가 없었다( Table 2).…”

Section: 균류병 및 세균병에 대한 작물의 저항성에서와 달리 선 충에 대한 저항성은 식물에 뿌리혹선충병이 발생하지 않는unclassified

Occurrence of Meloidogyne incognita Infecting Resistant Cultivars and Development of an Efficient Screening Method for Resistant Tomato to the Mi-virulent -virulent Nematode

Hwang¹,

Park²,

Kim³

et al. 2014

HST

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Root-knot symptoms were found on a commercial tomato cultivar carrying Mi, a resistance gene to root-knot nematodes including Meloidogyne incognita, M. arenaria, and M. javanica in 2012 at Buyeo, Chungnam Province in Korea. The isolate was identified as M. incognita based on molecular analyses using two species-specific primer sets. Pathogenicity of the isolate on one susceptible and three resistant tomato cultivars to the root-knot nematodes was tested. The nematode isolate showed strong pathogenicity on all the tested cultivars at all tested incubation temperatures. In addition, resistance degree of 33 commercial tomato cultivars, 8 susceptible and 25 resistant cultivars to root-knot nematodes, was also tested. Plants were determined as resistant when they suppressed the nematode reproduction. All the cultivars demonstrated strong susceptibility to the nematode regardless of resistance of the tomato cultivars. To our knowledge, this is the first report on the occurrence of Mi infecting M. incognita isolate in Korea. On the other hand, to construct an efficient screening method for selecting resistant breeding source to the nematode isolate, root-knot development of M. incognita on four tomato cultivars according to several conditions such as inoculum concentration, plant growth stage, and incubation period after transplant was investigated. Reproduction of the nematode on all the tested cultivars according to inoculum concentration increased in a dose-dependent manner. Except for inoculum concentration, there was no significant difference in reproduction level of the cultivars according to the other tested conditions. On the basis of the results, we suggest an efficient screening method for new resistant tomato to the nematode isolate.

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Variability in Reproduction of Isolates ofMeloidogyne incognitaandM. javanicaon Resistant Tomato Genotypes

Cited by 100 publications

References 0 publications

How Durable is Root Knot Nematode Resistance in Tomato?

How Durable is Root Knot Nematode Resistance in Tomato?

Categories of Resistance to Greenbug (Homoptera: Aphididae) Biotype I in <B> <I>Aegilops tauschii</I> </B> Germplasm

Occurrence of Meloidogyne incognita Infecting Resistant Cultivars and Development of an Efficient Screening Method for Resistant Tomato to the Mi-virulent -virulent Nematode

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