Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 409

Full Length Research Paper

Reactions of traditional upland and aerobic rice genotypes to rice root knot nematode (Meloidogyne graminicola)

  Kuntal Das1, 2*, Dule Zhao1, Dirk De Waele1,3, Raj Kumar Singh Tiwari2,Dhirendra Kumar Shrivastava4 and Arvind Kumar1
  1International Rice Research Institute, DAPO Box 7777, Metro Manila, Philippines. 2T.C.B. College of Agriculture and Research Station, Sarkanda, Bilaspur, Indira Gandhi Krishi Vishwavidyalaya, Raipur, Chhattisgarh, India. 3Laboratory of Tropical Crop Improvement, Catholic University of Leuven), Kasteelpark Arenberg 13, 3001 Leuven, Belgium. 4Department of Botany, Government P. G. Science College, Bilaspur-495001, Chhattisgarh, India.
Email: [email protected]

  •  Accepted: 22 June 2011
  •  Published: 30 July 2011

Abstract

 

Aerobic rice cultivation is an efficient water saving strategy which maintains a significantly higher yield than traditional upland varieties. The upland rice in South East Asia is largely affected by parasitic rice root knot nematode, Meloidogyne graminicolacausing severe yield losses. In the present investigation 14 widely cultivated traditional upland varieties and 45 breeding genotypes improved for aerobic adaptation belonging to Oryza sativa species were evaluated against M. graminicola. Experiment in indoor growth chamber revealed a wide variability among and within the two rice ecotype in terms of nematode population and fresh root weight. Average of final and initial population ratio (RF value) for second stage juveniles (J2) in aerobic rice genotypes (6.5) was significantly lower than upland cultivars (87.1). O. glaberrima accessions CG 14 and TOG 5674 behaved as true resistant references (RF=1). Among traditional cultivars WAB 638-1 and IRAT 216 and among aerobic rice genotypes IR 81426-B-B-186-4 and IR81449-B-B-51-4 showed significant resistant reaction against M. graminicola. Moreover, heritability analysis showed resistance among evaluated rice genotypes is heritable. Our study concluded that newly emerged aerobic rice genotypes were superior to traditional upland cultivars in terms of resistance to rice root knot nematode and improvement of these genotypes for resistance is feasible.

 

Key words: Aerobic rice, traditional upland rice, Oryza sativaMeloidogyne graminicola, heritability analysis.