ISHS Acta Horticulturae 815: International Workshop on Chestnut Management in Mediterranean Countries - Problems and Prospects
PRELIMINARY REPORT ON THE SEGREGATION OF RESISTANCE IN CHESTNUTS TO INFESTATION BY ORIENTAL CHESTNUT GALL WASP |
| Authors: | S. Anagnostakis, S. Clark, H. McNab |
| Keywords: | Breeding, Dryocosmus, susceptibility, genetically controlled |
| Abstract:
In 1995, hybrid chestnuts were planted in North Carolina, (southern U.S.A.), where the introduced insect Oriental Chestnut Gall Wasp (Dryocosmus kuriphilus) is present. Of the 93 trees planted, 53 survived 12 years and were evaluated for the presence of Oriental Chestnut Gall Wasp infestation. Among the survivors, 11 had no wasp galls and 25 had few galls. Because the female parents were all susceptible, the genes controlling resistance to infestation cannot be cytoplasmic. Numbers of trees with little or no infestation suggest that genetic control may be a single, dominant nuclear gene. If this is true, resistance can easily be transferred into timber chestnuts and orchard chestnut cultivars. | |
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