Evaluation of the severity and tolerance of a collection of durum wheat to root rot assessment

Abstract

National production of durum wheat falls short of its potential, and By controlling its major diseases, including root rot. These latest induced by Fusarium culmorum and Cochliobolus sativus, see their Severity worsen with climate change. Genetic improvement work Diseases are more or less discontinuous, and it is from this perspective that this The aim of this work is to evaluate the levels of resistance to root rot National collection of 100 strains of durum wheat. The lines were planted in natural soil Previously inoculated with a conidial suspension of the two fungi. The experience Was repeated twice during two years under glass. The selected variables were The severity index (SI), the percentage of germination (Germ), and the dry weight (PS). The Selection of resistant lines was based on the analysis of variance, and the identification of Tolerant lines was accomplished by integrating main component analysis, And hierarchical classification, all based on (IS, PS, and Germ and yield biological). Seven lines were identified as resistant on both Years: 3012, 9373, 3010, 3191, 9416, 40041 and 3052 with severities ranging from 42 to 52%, On the other hand, lines 3206, 9406, 3017 and 3110 were identified as tolerant with Severity ranging from 41 to 50% but with a biological yield ranging from 3.4 to 5.7 g. The Implications of our findings are discussed at the level of this paper.