Breeding maize lines for complete and partial resistance to maize streak virus (MSV)

Rodier A., Assié Jérôme, Marchand Jean-Leu, Hervé Y.. 1995. Breeding maize lines for complete and partial resistance to maize streak virus (MSV). Euphytica (81) : 57-70.

Autre titre : Amélioration des lignées de maïs pour une résistance complète et partielle au virus striure du maïs (MSV)

Résumé : S1 to S5 inbred lines, derived from a maize population bred for its overall resistance to three tropical viruses, were screened for resistance to maize streak virus (MSV) by artificial plant infection using viruliferous leafhoppers. Symptoms were rated and intra-line frequency distributions studied for a11 pedigree inbred lines. Mortality due to MSV was very low among these inbreds. Symptoms appeared later, developed slower and were less severe than in the susceptible control hybrid. Results of a study of 500 S1 and 93 S2 lines suggested that resistance is under genetic control via a system involving loci with major genes (with dominance for resistance) controlling high to complete resistance, associated with a genetic system involving loci with minor genes controlling partial resistance. Lines expressing complete resistance to MSV were developed from 5 cycles of inbreeding and selection. The relevance of such complete and partial resistance is discussed.

Mots-clés Agrovoc : Zea mays, amélioration des plantes, gène dominant, gène récessif, virus striure du maïs, résistance aux maladies

Classification Agris : F30 - Génétique et amélioration des plantes
H20 - Maladies des plantes

Auteurs et affiliations

• Rodier A.
• Assié Jérôme
• Marchand Jean-Leu
• Hervé Y.

Source : Cirad - Agritrop (https://agritrop.cirad.fr/389711/)

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