Section 1
Chapter 388

Genetic studies of resistance to downy mildew in sunflower (Helianthus annuus L.)

Fernandez Martinez, J.; Dominguez Gimenez, J.

Anales del Instituto Nacional de Investigaciones Agrarias, Produccion Vegetal 8: 105-111


Accession: 000387888

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Test crosses between HA61, resistant to Plasmopara halstedii, and line P21 of Peredovik which is highly susceptible, indicated that, with the exception of one F2 family, in which a segregation ratio of 15 resistant to 1 susceptible was observed, the majority of the families had a segregation ratio which suggested that a single dominant gene controls resistance in HA61 to the race of the fungus existing in southern Spain.

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