Inheritance of green peach aphid resistance in the peach cultivar 'Rubira' |
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| Authors: | T Pascal F Pfeiffer J Kervella J P Lacroze M H Sauge W E Weber |
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| Institution: | Unitéde Génétique et d'Amélioration des Fruits et Légumes, and;UMR INRA/UAPV Ecologie des Invertébrés, Institut National de la Recherche Agronomique, Site Agroparc, F-84914 Avignon, France;E-mail: |
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| Abstract: | The green peach aphid (GPA) is a serious pest of peach tree in many areas of the world. To date, only one GPA resistance gene has been assigned in peach. This study was initiated to determine the inheritance of GPA resistance in the red leaf peach rootstock cultivar ‘Rubira’. Crosses were made between ‘Rubira’ and the susceptible green leaf peach rootstock cultivar ‘Pamirskij 5′. Genetic analysis was performed on the parents, F1 and F2 progenies. Analyses of segregation patterns of plants in F1 (1:0) and F2 (3:1) indicated single dominant gene control of GPA resistance in ‘Rubira’. Reddish spots, probably due to aphid feeding punctures, are associated with, but not themselves responsible for, the GPA resistance in ‘Rubira’. No relationship was found between GPA resistance and the red leaf character of ‘Rubira’. |
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| Keywords: | Prunus persica Myzus persicae antixenosis insect resistance gene red leaf character reddish spot |
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