Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Nematropica 221-228 damage potential Oryza reproductive potential susceptible yield loss AFRIQUE ASIE 2016 fdi:010069471 ENG Nematropica 0099-5444 ISI:000396339100012 2 https://www.documentation.ird.fr/hor/fdi:010069471 https://www.documentation.ird.fr/intranet/publi/2017/05/010069471.pdf 46 Horizon (IRD) 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. 076 UR186 Philippines / Vietnam / Afrique du Sud