ISHS Acta Horticulturae 465: IV International Peach Symposium
BREEDING FOR RESISTANCE TO GREEN APHID MYZUS PERSICAE SULZER IN THE PEACH |
| Authors: | R. Monet, A. Guye, G. Massonié |
| Keywords: | Prunus persica, Breeding, Selection |
| DOI: | 10.17660/ActaHortic.1998.465.19 |
| Abstract:
Prospecting through botanical collections has lead us to the discovery of several sources of resistance to Myzus persicae, both within the peach species (clone S2678 and Rubira) and among close species (P. davidiana var potanini, and P. cerasifera clone P2993). The clone S2678 (Weeping Flower Peach) was chosen among these different sources of resistance as it could also be used to develop a weeping variety in the same breeding programme. Myzus persicae does not establish colonies on S2678. Besides, its bites induce the appearance of characteristic necrotic areas (hypersensitivity reaction) which make it easy to distinguish resistant trees from sensitive ones. To start with, the resistance mode of heredity was studied by creating F1 and F2 generations from the resistant parent crossed with a sensitive one, Redhaven. The resistance character is dominant and monogenic (symbols Rm1/rm1). Breeding was then continued to improve fruit quality by using the cv. Early Sungrand as a parent to introduce the nectarine character. Following five generations of breeding, the first marketing selections were obtained. | |
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