Resistance of sunflower (Helianthus annuus L.) to terminal bud attack bySclerotinia sclerotiorum (Lib.) de Bary

Achbani, El Hassan; Labrouhe, Denis Tourvieille de; Vear, Félicity

doi:10.1007/bf01877136

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…the additive inheritance observed here most resembles the In the presence of a year x genotype interaction, correlations results found for resistance to terminal bud attack by Sclerotinia were calculated not only for the mean data, but also for each sclerotiorum (Achbani et al 1996). These authors observed year.…”

Section: Tests Of Resistance To Mycelium Growth On Leavesmentioning

confidence: 69%

Inheritance of resistance to phomopsis (Diaporthe helianthi) in sunflower

Vear¹,

Garreyn²,

Labrouhe³

1997

Plant Breeding

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The inheritance of resistance of sunflower to phomopsis {Diaporthe helianthi) was studied on 10 inbred lines representing a range of resistance and susceptibiUty levels, and 25 hybrids from a factorial cross of these Unes. Analyses of observations over a 3-year period, of seminatural infection (presence of stem lesions greater than 5 cm) on the hybrids indicated that additive gene control was predominant, with no significant interactions between parental effects. Correlations between infection of parental lines and the mean of their hybrids were not always significant, with certain inbreds which appeared quite susceptible giving hybrids with good levels of resistance. In order to predict hybrid values, it appears necessary to determine the general combining abiUties of parental lines. Some inbreds gave very high levels of resistance, others gave very high levels of susceptibiUty. A test measuring the rate of extension of Z). helianthi myceUum on leaves was significantly correlated with the results of natural infections. In particular, it permitted distinction of the most susceptible genotypes, and thus could be used in first generations of breeding to eUminate the most susceptible plants.

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Section: Tests Of Resistance To Mycelium Growth On Leavesmentioning

confidence: 69%

Inheritance of resistance to phomopsis (Diaporthe helianthi) in sunflower

Vear¹,

Garreyn²,

Labrouhe³

1997

Plant Breeding

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“…The standard deviations of the estimated distances may be as great as the distances and thus may affect local locus ordering and give some overestimation of distances between loci (Lorieux and Gonzales de Leon 1993). The inheritance of resistance to S. sclerotiorum terminal bud attack was reported by Achbani et al (1996) as quantitative, but under mostly additive control. Since cultivated sunflower genotypes show quite clear differences, from very susceptible to completely resistant, it has been thought that this characteristic may be less polygenic than resistance to capitulum attack.…”

Section: Discussionmentioning

confidence: 97%

Comparative genetic analysis of quantitative traits in sunflower (Helianthus annuus L.)

Bert

Dechamp

Serre³

et al. 2004

Theor Appl Genet

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One hundred and fifty F(2)-F(3) families from a cross between two inbred sunflower lines FU and PAZ2 were used to map quantitative trait loci (QTL) for resistance to white rot (Sclerotinia sclerotiorum) attacks of terminal buds and capitula, and black stem ( Phoma macdonaldii). A genetic linkage map of 18 linkage groups with 216 molecular markers spanning 1,937 cM was constructed. Disease resistances were measured in field experiments for S. sclerotiorum and under controlled conditions for P. macdonaldii. For resistance to S. sclerotiorum terminal bud attack, seven QTL were identified, each explaining less than 10% of phenotypic variance. For capitulum attack by this parasite, there were four QTL (each explaining up to 20% of variation) and for P. macdonaldii resistance, four QTL were identified, each having effects of up to 16%. The S. sclerotiorum capitulum resistance QTL were compared with those reported previously and it was concluded that resistance to this disease is governed by a considerable number of QTL, located on almost all the sunflower linkage groups.

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“…Most papers show genetic effects preponderantly additive for disease resistance when single hybrids were artificially infected by S. sclerotiorum on plant organs such as capitula [13,19,27], leaves [5], terminal buds [1], basal stem [14] and cotyledons [24]. Conversely, Vrânceanu et al [28] showed strong SCA effects for resistance to mycelium infection of Sclerotinia basal attack in sunflower germplasm and Pîrvu et al [16] detected two inbred lines with a single recessive gene controlling mechanical resistance to initial penetration of the stem-surface tissues by Sclerotinia mycelium.…”

Section: Discussionmentioning

confidence: 99%

Genotypic responses and diallel analysis for an early resistance test to Sclerotinia sclerotiorum in sunflower

Castaño

Baldini

Ré

et al. 2002

OCL

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Résumé : L'évaluation de la performance des génotypes du tournesol aux infections de Sclerotinia sclerotiorum permet d'identifier des nouvelles sources de résistance aux différents types d'attaque produits par ce pathogène. Les tests de résistance, menés la plupart du temps au champ, peuvent fournir des renseignements pertinents sur le niveau de résistance du matériel testé. Ce dernier pouvant ensuite permettre l'obtention de variétés hybrides. Malheureusement les protocoles d'évaluation de résistance actuellement sont couteaux et difficile à mettre en place, donc l'utilisation de tests ayant le but du rétrécissement des coûts et travaux menés doit être considéré d'intérêt. Dans ce contexte cet article décrit le comportement du germplasm de tournesol à base génétique large par moyen d'un test d'évaluation de résistance à S. sclerotiorum réalisé en conditions contrôlées de serre à un stade précoce du développement de la plante. Un plan de croisements diallèle, sans les réciproques, a été suivi en utilisant quatre populations d'origine argentine. Les dix génotypes, c'est-à-dire les 4 populations et leurs 6 descendants, ont été infectés sans blessure en déposant une graine d'avoine contaminée par du mycélium de S. sclerotiorum au niveau du sol et à la base de la jeune tige des plantules au stade quatre paires de feuilles. La proportion de plantules mortes est estimée 25 jours après l'inoculation. L'analyse des données a détecté des réponses significativement différentes parmi les génotypes infectés ainsi que des effets significatifs des aptitudes (générale et spécifique) à la combinaison des populations évaluées. La méthodologie usagée a permis de détecter des populations parentales du tournesol qui pourraient être utilisées en sélection pour leur performance à S. sclerotiorum. L'utilité de ce matériel et du test d'évaluation de résistance à S. sclerotiorum dans les programmes d'amélioration génétique du tournesol est discutée. Summary :The evaluation of sunflower genotypic performance against Sclerotinia sclerotiorum infections is important for understanding its usefulness as source of resistance. In the field, artificial and natural resistance tests provide important information that can be used in the selection of the best materials, however the procedures for resistance tests are usually both expensive and laborious. This work describes the performance of sunflower genotypes of broad genetic base at an early stage of plant development using a resistance test carried out under controlled conditions in the greenhouse. Statistical analysis detected highly significant genotypic responses and the combined abilities effects among the evaluated populations and their offspring, obtained by a diallel crossing system method 2 for dead seedlings (%) at 25 days after S. sclerotiorum infection on the basal stem.Article disponible sur le site http://www.ocl-journal.org ou http://dx

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Resistance of sunflower (Helianthus annuus L.) to terminal bud attack bySclerotinia sclerotiorum (Lib.) de Bary

Cited by 8 publications

References 8 publications

Inheritance of resistance to phomopsis (Diaporthe helianthi) in sunflower

Inheritance of resistance to phomopsis (Diaporthe helianthi) in sunflower

Comparative genetic analysis of quantitative traits in sunflower (Helianthus annuus L.)

Genotypic responses and diallel analysis for an early resistance test to Sclerotinia sclerotiorum in sunflower

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