Evaluation of resistance and tolerance of rice genotypes from crosses of Oryza glaberrima and O. sativa to the rice root-knot nematode, Meloidogyne graminicola

2018 ◽  
Vol 43 (3) ◽  
pp. 230-241 ◽  
Author(s):  
Ma. Teodora Nadong Cabasan ◽  
Arvind Kumar ◽  
Dirk De Waele
Keyword(s):  
Rice Root ◽  
Oryza Glaberrima ◽  
Root Knot Nematode ◽  
Meloidogyne Graminicola ◽  
Rice Genotypes

Comparison of migration, penetration, development and reproduction of Meloidogyne graminicola on susceptible and resistant rice genotypes

Nematology ◽  
2012 ◽  
Vol 14 (4) ◽  
pp. 405-415 ◽  
Author(s):  
Ma. Teodora Nadong Cabasan ◽  
Arvind Kumar ◽  
Dirk De Waele
Keyword(s):  
Egg Laying ◽  
Rice Root ◽  
Root Knot Nematode ◽  
Nematode Reproduction ◽  
Meloidogyne Graminicola ◽  
Second Stage ◽  
African Rice ◽  
Asian Rice ◽  
Rice Genotypes ◽  
Nematode Development

Migration, penetration, development and reproduction of the rice root-knot nematode, Meloidogyne graminicola, in the resistant African rice genotypes TOG5674, TOG5675, CG14 and RAM131, and in the susceptible Asian rice genotypes IR64 and UPLRi-5 were studied and compared. The number of second-stage juveniles (J2) that had migrated horizontally and vertically towards the rhizosphere at 48 h after inoculation was comparable in both resistant and susceptible rice genotypes. Penetration of J2 was significantly lower in the resistant rice genotypes compared with the susceptible rice genotypes at 3 and 7 days after inoculation (DAI). Nematode development in the resistant rice genotypes was slower than in the susceptible rice genotypes. Nematode reproduction was significantly lower in the resistant rice genotypes, which supported fewer eggs per g of roots and eggs per female. A significantly higher percentage of egg-laying females was found in the susceptible rice genotypes. Mature females that had developed in the resistant rice genotypes were significantly smaller than the ones in the susceptible rice genotypes. The resistant rice genotypes had significantly fewer galls than the susceptible rice genotypes.

scholarly journals Histopathology of the rice root-knot nematode, Meloidogyne graminicola, on Oryza sativa and O. glaberrima

Nematology ◽  
2014 ◽  
Vol 16 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Ma. Teodora Nadong Cabasan ◽  
Arvind Kumar ◽  
Stéphane Bellafiore ◽  
Dirk De Waele
Keyword(s):  
Early Stage ◽  
Management Strategies ◽  
Giant Cells ◽  
Structural Features ◽  
Defence Response ◽  
Root Penetration ◽  
Oryza Glaberrima ◽  
Root Knot Nematode ◽  
Meloidogyne Graminicola ◽  
Rice Genotypes

The root-knot nematode, Meloidogyne graminicola, can cause substantial rice yield losses. Understanding the mechanisms of resistance to this nematode species in known resistant rice genotypes may help to improve rice genotypes, aiming at developing and implementing environment-friendly and cost-effective nematode management strategies. Using susceptible and resistant rice genotypes, a comparative analysis of histological response mechanisms was made during two phases of the nematode colonisation: i) root penetration; and ii) subsequent establishment and development by M. graminicola second-stage juveniles (J2). Two types of defence response mechanisms could be distinguished in the resistant rice genotypes. The early defence response consisted of a hypersensitive response (HR)-like reaction in the early stage of infection characterised by necrosis of cells directly affected by nematode feeding. This HR-like reaction was observed only in the M. graminicola-resistant Oryza glaberrima genotypes and not in the M. graminicola-susceptible O. sativa genotypes. The late defence response took place after the induction of giant cells by the J2. Giant cells usually collapsed and degenerated before J2 developed into adults. Structural features of the roots of the susceptible O. sativa showed greater root and stele diam. and cortex thickness than the resistant O. glaberrima genotypes. Desired features of plants with resistance to M. graminicola elucidated in this study can be used for selection of plants for breeding programmes.

scholarly journals Evaluation of Organic Amendments against Rice Root-KnotNematode at Seedling Stage of Rice

1970 ◽  
Vol 9 ◽  
pp. 21-27 ◽  
Author(s):  
Nabin Kumar Dangal ◽  
D. Sharma Poudyal ◽  
S. M. Shrestha ◽  
C. Adhikari ◽  
J. M. Duxbury ◽  
...  
Keyword(s):  
Block Design ◽  
Organic Amendments ◽  
Severity Index ◽  
Rice Root ◽  
Chicken Manure ◽  
Root Weight ◽  
Root Knot Nematode ◽  
Meloidogyne Graminicola ◽  
Shoot Weight ◽  
Lesion Severity

Pot experiment was conducted during July-September 2006 to evaluate some organic amendments such as sesame (Sesamum indicum) biomass, buckwheat (Fagopyrum esculentum) biomass, neem (Azadirachta indica) leaves, chinaberry (Melia azedarch) leaves and chicken manure @ 1, 2 and 3 t ha-1 each against the rice root-knot nematode (Meloidogyne graminicola Golden & Birchfield) in direct seeded rice. The treatments were replicated five times in a randomized complete block design. The number of second stage juveniles (J2) of M. graminicola was significantly low in chicken manure @ 3 t ha-1. The root knot severity index was significantly low in sesame @ 3 t ha-1, chinaberry @ 3, 2 or 1 t ha-1, neem @ 3 t ha-1 and chicken manure @ 2 or 3 t ha-1 amended soil but root lesion severity index was lower only in chicken manure @ 2 t ha-1 treated plots. The fresh shoot weight and length were significantly high in chicken manure amendment @ 2 or 3 t ha-1 at 45th day after seeding. However, the fresh root weight, length, number of leaves and number of J2 recovered from the roots were non-significant. Key words: biomass; juveniles; Meloidogyne graminicola; root-knot severity index; root lesion severity index DOI: 10.3126/njst.v9i0.3160 Nepal Journal of Science and Technology 9 (2008) 21-27

scholarly journals Evaluation of rice landraces against rice root-knot nematode, Meloidogyne graminicola

2015 ◽  
Vol 9 (16) ◽  
pp. 1128-1131 ◽  
Author(s):  
Ravindra H ◽  
Sehgal Mukesh ◽  
B Narasimhamurthy H ◽  
S Imran Khan H ◽  
A Shruthi S
Keyword(s):  
Rice Root ◽  
Root Knot Nematode ◽  
Meloidogyne Graminicola ◽  
Rice Landraces
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