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Título: | Inheritance of resistance to sunflower broomrape (Orobanche cumana Wallr.) in an interspecific cross between Helianthus annuus and Helianthus debilis subsp. tardiflorus |
Autor: | Velasco Varo, Leonardo CSIC ORCID ; Pérez-Vich, Begoña CSIC ORCID ; Yassein, Ahmed A. M.; Jan, Chao Chien; Fernández Martínez, José María CSIC | Palabras clave: | Helianthus annuus Helianthus debilis subsp. tardiflorus Genetic resistance Orobanche cumana Sunflower broomrape |
Fecha de publicación: | feb-2012 | Editor: | Blackwell Publishing | Citación: | Plant Breeding 131(1): 220-221 (2012) | Resumen: | With 2 tables Sunflower broomrape (Orobanche cumana Wallr.) constrains sunflower cultivation in many areas of Europe and Asia. Populations classified as race G that overcome all known resistance genes have recently appeared. The objective of this research was to study the inheritance of resistance to broomrape race G in a resistant accession of Helianthus debilis subsp. tardiflorus. Heads of H. debilis subsp. tardiflorus were emasculated and pollinated with pollen of the Helianthus annuus-susceptible line HA 89. BC 1F 1, BC 1F 2, BC 1F 3, BC 2F 1, BC 2F 2 and BC 2F 3 generations were developed and evaluated for broomrape resistance. F 1 plants were resistant, indicating dominance of resistance. BC 1 populations segregated in a ratio of one resistant to one susceptible plant, whereas BC 1F 2 and BC 2F 2 populations segregated in a ratio of three resistant to one susceptible plant, which was confirmed in the evaluation of the BC 1F 3 and BC 2F 3 populations. The results indicated that resistance to broomrape race G in H. debilis subsp. tardiflorus is controlled by dominant alleles at a single locus. This mode of inheritance will facilitate the introgression of resistance into elite cultivars. © 2011 Blackwell Verlag GmbH. | URI: | http://hdl.handle.net/10261/88818 | DOI: | 10.1111/j.1439-0523.2011.01915.x | Identificadores: | doi: 10.1111/j.1439-0523.2011.01915.x issn: 0179-9541 e-issn: 1439-0523 |
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