Inheritance of partial resistance to black stem (Phoma macdonaldii) in sunflower

Autor: Ahmad Sarrafi, Ali Mohammad Roustaee, Grégory Dechamp-Guillaume, Philippe Lesigne, G. Barrault
Přispěvatelé: Amélioration des Plantes et Biotechnologies Végétales (APBV), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, ASGROW (FRANCE), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Jazyk: angličtina
Rok vydání: 2001
Předmět:
Zdroj: Plant Pathology
Plant Pathology, 2001, 49 (3), pp.396-401. ⟨10.1046/j.1365-3059.2000.00464.x⟩
Plant Pathology, Wiley, 2001, 49 (3), pp.396-401. ⟨10.1046/j.1365-3059.2000.00464.x⟩
ISSN: 0032-0862
1365-3059
DOI: 10.1046/j.1365-3059.2000.00464.x⟩
Popis: International audience; Two programmes to investigate the inheritance of resistance to black stem in sunflowers were undertaken in a controlled-environment growth chamber. In the first, an experiment was performed using a randomized complete block design with 24 lines, six male-sterile (A lines), six maintainers (B lines), six restorers (R lines) and their six F-1 hybrids in six replications. Each treatment consisted of 12 seedlings. Twelve-day-old seedlings were inoculated with a suspension of pycniospores, and 7 days later the two cotyledon petioles of each seedling were scored on a 1-9 scale for the percentage of necrotic area. Some alloplasmic lines (which have the same nucleus and different cytoplasms) gave a significant cytoplasmic effect for improved partial resistance to the disease. Deviation of F-1 hybrids from the mean of the parent values was significant for partial resistance to Phoma macdonaldii in three of the six F-1 hybrids. Two further experiments with eight lines (resistant and susceptible) at the fifth leaf-pair and flowering stages were carried out under the same conditions. At both growth stages the previous classification of lines at the seedling stage was confirmed. In the second programme, five male-sterile sunflower lines were crossed with five fertility-restorers in a factorial mating design. The 10 inbred lines and their 25 F-1 hybrids were studied in two successive experiments under the same conditions and with the same experimental design and isolate of Phoma as in the seedling-stage experiment in the first programme. Analysis of variance showed that male-sterile and restorer lines possessed general combining abilities, and also that specific combining abilities of F-1 hybrids were significant. The estimates of general combining ability for partial resistance were significant in AS617A, AS618A and AS614R inbred lines. These lines are available for developing F-1 hybrids with improved resistance to Phoma in sunflower-breeding programmes.
Databáze: OpenAIRE
Externí odkaz: