Cabasan M. T. N., Bellafiore Stéphane, Kumar A., De Waele D. (2016). The effect of temperature on resistance in african rice (oryza glaberrima steud.) genotypes to the rice root-knot nematode meloidogyne graminicola. Nematropica, 46 (2), p. 221-228. ISSN 0099-5444.
Titre du document
The effect of temperature on resistance in african rice (oryza glaberrima steud.) genotypes to the rice root-knot nematode meloidogyne graminicola
Cabasan M. T. N., Bellafiore Stéphane, Kumar A., De Waele D.
Source
Nematropica, 2016,
46 (2), p. 221-228 ISSN 0099-5444
The rice root-knot nematode, Meloidogyne graminicola, has emerged as a serious soilborne pathogen of rice in most Asian countries. The host response of the M. graminicola-resistant African (Oryza glaberrima) rice genotypes TOG5674, TOG5675, and CG14 was examined at two day/night temperature regimes, 29/26 degrees C and 34/31 degrees C. At the 34/31 degrees C regime, second-stage juvenile population densities in roots of the African rice genotypes increased significantly compared to those of plants grown at the 29/26 degrees C regime, suggesting that the resistance to M. graminicola became ineffective at the latter temperature regime. An increase in temperature also resulted in a significant reduction in all yield-contributing traits and yield of the three African rice genotypes. High variability was recorded in terms of percentage reduction of all traits measured among the genotypes examined at the 34/31 degrees C, compared to the 29/26 degrees C regime. However, the highest reduction was for yield.
