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논문 기본 정보

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학술저널
저자정보
Marwa Batnini (Centre of Biotechnology of Borj-Cedria) Imen Haddoudi (Centre of Biotechnology of Borj-Cedria) Wael Taamali (Center of Biotechnology of Borj-Cedria) Naceur Djebali (Center of Biotechnology of Borj-Cedria) Mounawer Badri (Center of Biotechnology of Borj-Cedria) Moncef Mrabet (Centre of Biotechnology of Borj-Cedria) Haythem Mhadhbi (Centre of Biotechnology of Borj-Cedria)
저널정보
한국식물병리학회 The Plant Pathology Journal The Plant Pathology Journal 제37권 제4호
발행연도
2021.8
수록면
315 - 328 (14page)

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Fusarium and Rhizoctonia genera are important pathogens of many field crops worldwide. They are constantly evolving and expanding their host range. Selecting resistant cultivars is an effective strategy to break their infection cycles. To this end, we screened a collection of Medicago truncatula accessions against Fusarium oxysporum, Fusarium solani, and Rhizoctonia solani strains isolated from different plant species. Despite the small collection, a biodiversity in the disease response of M. truncatula accessions ranging from resistant phenotypes to highly susceptible ones was observed. A17 showed relative resistance to all fungal strains with the lowest disease incidence and ratings while TN1.11 was among the susceptible accessions. As an initiation of the characterization of resistance mechanisms, the antioxidant enzymes’ activities, at the early stages of infections, were compared between these contrasting accessions. Our results showed an increment of the antioxidant activities within A17 plants in leaves and roots. We also analyzed the responses of a population of recombinant inbred lines derived from the crossing of A17 and TN1.11 to the infection with the same fungal strains. The broad-sense heritability of measured traits ranged from 0.87 to 0.95, from 0.72 to 0.96, and from 0.14 to 0.85 under control, F. oxysporum, and R. solani conditions, respectively. This high estimated heritability underlines the importance of further molecular analysis of the observed resistance to identify selection markers that could be incorporated into a breeding program and thus improving soil-borne pathogens resistance in crops.

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Materials and Methods
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