R-41, a sunflower restorer inbred line, carrying two genes for resistance against a highly virulent Spanish population of Orobanche cernua |
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Authors: | J Domínguez |
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Institution: | Department of Breeding and Agronomy, C.I.D.A., Alameda del Obisop, P.B. Box 4240, E-14080 Córdoba, Spain |
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Abstract: | The inheritance of resistance to a highly virulent population of sunflower broomrape (Orobanche cernua) has been studied in R-41, a Spanish sunflower restorer inbred line. Using the cytoplasmic male-sterile inbred line HA-89 (cms; very susceptible to this population of broomrape) as a female parent, progenies of the cross with R-41, i.e. Fl, F2 and BC1 to both parents, as well as the parental lines, were analysed for their reaction to the broomrape population EC-94. The goodness of fit of the observed vs expected segregation ratios indicated that the inheritance of resistance to broomrape in line R-41 is conferred by two independent dominant genes. |
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Keywords: | Helianthus annuus Orobanche cernua broom-rape genetic analysis dominant resistance |
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