scholarly journals A Single Recessive Gene for Resistance to the Root-Knot Nematode (Meloidogyne Javanica) in Cucumis sativus var. hardwlckii

1997 ◽  
Vol 88 (1) ◽  
pp. 66-69 ◽  
Author(s):  
S. A. Walters ◽  
T. C. Wehner ◽  
K. R. Barker
Keyword(s):  
Cucumis Sativus ◽  
Recessive Gene ◽  
Meloidogyne Javanica ◽  
Single Recessive Gene ◽  
Root Knot Nematode

INHERITANCE AND LINKAGE RELATIONSHIP OF TWO RADIATION-INDUCED SEEDLING MUTANTS OF CUCUMBER

1973 ◽  
Vol 15 (3) ◽  
pp. 597-603 ◽  
Author(s):  
Ernest D. P. Whelan
Keyword(s):  
Cucumis Sativus ◽  
Recessive Gene ◽  
Single Recessive Gene ◽  
Linkage Relationship ◽  
Cucumis Sativus L ◽  
Gene Mutant ◽  
New Gene ◽  
Radiation Induced ◽  
Relationship Of ◽  
Pale Green

A radiation-induced mutation of cucumber (Cucumis sativus L.) which affects plant pubescence is controlled by a single recessive gene. Mutant seedlings have glabrous hynocotyls, and mature plants have glabrous internodes and leaf petioles. The laminae, especially of the first true leaf, the node areas and the perianths are slightly pubescent (glabrate). This new gene is designated glb, glabrate. There was no evidence of linkage between this gene and glabrous (gl), non-bitter cotyledon (bi), light sensitive (ls), yellow cotyledon (yc) or crinkled-leaf (cr).A sister line of glb also segregated for a lethal mutation. Mutant seedlings had pale green, slightly smaller cotyledons, and died 6 to 7 days after emergence. The mutation was controlled by a single recessive gene, designated pl, pale lethal. The gene was not linked with either glabrate (gib) or non-bitter cotyledon (bi).

A single recessive gene controls fragrance in cucumber (Cucumis sativus L.)

2013 ◽  
Vol 92 (1) ◽  
pp. 147-149 ◽  
Author(s):  
P. PRAMNOI ◽  
P. SOMTA ◽  
S. CHANKAEW ◽  
R. JUWATTANASOMRAN ◽  
P. SRINIVES
Keyword(s):  
Cucumis Sativus ◽  
Recessive Gene ◽  
Single Recessive Gene ◽  
Cucumis Sativus L

scholarly journals Phenotypic Characterization and Molecular Mapping of Recessive Resistance To Meloidogyne Javanica in Cucumber, Cucumis Sativus

2021 ◽  
Author(s):  
William Brock Rutter ◽  
Abolfazl Hajihassani ◽  
Yuhui Wang ◽  
Yiqun Wang
Keyword(s):  
Candidate Genes ◽  
Cucumis Sativus ◽  
Molecular Mapping ◽  
Meloidogyne Javanica ◽  
Chromosome 1 ◽  
Management Tool ◽  
Phenotypic Characterization ◽  
Resistance Locus ◽  
Root Knot Nematode ◽  
Starting Point

Abstract The Javanese root-knot nematode (JRKN, Meloidogyne javanica) is a serious pest of cucumber (Cucumis sativus) grown in tropical and subtropical regions. The recessive mj resistance gene first identified in the wild cucumber (C. sativus var. hardwickii), is the only known source of resistance to JRKN within the C. sativus gene pool. Despite its potential utility as a nematode management tool, the mj trait has yet to be fully characterized or widely incorporated into commercial cucumber lines. In this study, we mapped the mj resistance locus to a 148-kb interval on cucumber chromosome 1 by phenotyping a recombinant inbred line (RIL) and targeted backcross populations. The genomic interval is predicted to contain 36 candidate genes, including several known to be directly related to plant defense against pathogens. We also conducted histological comparisons of nematode development in mj resistant and susceptible lines, providing evidence that the mechanism of action for this gene may be different from that of known RKN resistance genes. These results provide a set of tightly linked markers that can assist breeding programs seeking to incorporate mj resistance into new cucumber varieties. The candidate genes will also provide a starting point for further research into the mechanisms of action that underlay the mj-regulated JRKN resistance.

scholarly journals Mineral composition of beetroot treated with potential elicitors and inoculated with Meloidogyne javanica

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Paula Juliana Grotto Débia ◽  
Beatriz Cervejeira Bolanho ◽  
Claudia Regina Dias-Arieira
Keyword(s):  
Population Density ◽  
Mineral Composition ◽  
Integrated Management ◽  
Meloidogyne Javanica ◽  
Nematode Population ◽  
Root Knot Nematode ◽  
Cu Content ◽  
Manganese Zinc ◽  
Nematode Population Density ◽  
Elicitor Treatments

Abstract Background The root-knot nematode Meloidogyne javanica can infect beetroots, causing extensive damage to this food crop. As chemical and genetic control tactics have shown limited efficacy, new strategies are needed to improve the integrated management of this parasite. This study assessed the influence of potential defence elicitors and M. javanica infection on the mineral composition of beetroot. Plants were treated with acibenzolar-S-methyl (ASM), citrus biomass, or a mannanoligosaccharide-based product (MOS) and inoculated with 1000 eggs and second-stage juveniles of M. javanica. At 60 days after inoculation, beetroot plants were harvested and evaluated for nematode population density, vegetative growth, and mineral content. Results All potential elicitors reduced nematode population density in beetroots (p ≤ 0.10) and improved the vegetative parameters of inoculated plants (p ≤ 0.05), except shoot fresh weight. Some minerals were found to be negatively affected by treatments, particularly calcium, whose levels were consistently lower in treated plants. On the other hand, M. javanica inoculation increased magnesium, iron, manganese, zinc, and copper contents in beetroots. However, the latter mineral (Cu content) of inoculated plants was positively influenced by MOS and ASM. Conclusion Potential elicitor treatments did not improve the mineral composition of beetroot, but were effective in reducing nematode population density. Plants inoculated with M. javanica had higher mineral levels. However, gall formation decreases the commercial value of the crop and might render it unsuitable for commercialisation. M. javanica-infected beetroots may be used for nutrient extraction or sold to food processing industries.

The effect of organic compost of Caryocar brasiliense waste against Meloidogyne javanica in two vegetable crops

Nematology ◽  
2021 ◽  
pp. 1-8
Author(s):  
Fabíola de J. Silva ◽  
Regina C.F. Ribeiro ◽  
Adelica A. Xavier ◽  
Vanessa A. Gomes ◽  
Paulo V.M. Pacheco ◽  
...  
Keyword(s):  
Integrated Control ◽  
Meloidogyne Javanica ◽  
Control Measures ◽  
Vegetable Crops ◽  
Root Knot Nematode ◽  
Second Stage ◽  
Tomato Roots ◽  
Crop Development ◽  
Caryocar Brasiliense ◽  
Organic Compost

Summary Root-knot nematodes (Meloidogyne spp.) are responsible for various significant crop losses, which require taking integrated control measures. The present study aimed to identify a possible sustainable approach to the management of Meloidogyne javanica in vegetable crops using an organic compound based on pequi (Caryocar brasiliense) fruit residues. A pot experiment was conducted using cultivars of tomato and lettuce susceptible to M. javanica, with three amendments including inorganic fertiliser, cattle manure and five doses of organic compost with pequi residues. All treatments were inoculated with second-stage juveniles of M. javanica to simulate the root-knot nematode disease in field conditions. Increasing doses of organic compost with pequi residues from 5 kg m−3 to 30 kg m−3 promoted a significant decrease in the nematode population in both cultures evaluated. Organic compost (30 kg m−3) reduced the numbers of galls and eggs of M. javanica by 41.6 and 46.5% in tomato roots, and by 80.3 and 59.2% in lettuce roots, respectively, compared with non-treated control. Organic compost also increased crop development considerably. In general, there was a 43.0% increase in plant development compared to non-treated control. Hence, organic compost of pequi residues could be an alternative to toxic chemical nematicides and recommended as eco-friendly management of M. javanica in vegetable crops.

scholarly journals First record of infection of Papaya trees with root-knot nematode (Meloidogyne javanica) in Australia

2008 ◽  
Vol 3 (1) ◽  
pp. 87 ◽  
Author(s):  
Modika R. Perera ◽  
Ruben D. Flores-Vargas ◽  
Michael G. K. Jones
Keyword(s):  
Meloidogyne Javanica ◽  
First Record ◽  
Root Knot Nematode
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