Abstract
Lethal or chronic diseases of the raspberry caused by the nematodeborne viruses raspberry ringspot, arabis mosaic and tomato black ring can cause serious reductions in the productivity of raspberry plantations, but the existence of clear-cut immunities from these diseases provides a basis for control through plant breeding. The inheritance of these immunities was studied by means of graft tests on families of raspberry seedlings. Immunity from each virus was found to be dominant to susceptibility, but there was evidence that more than one gene was concerned in each case: while it was not possible to decide whether the second gene was a dominant complementary or a linked recessive affecting the viability of the immune segregates, the frequent occurrence in the raspberry of aberrant segregation ratios due to such lethal genes makes the latter explanation the more probable. There was also evidence of linkage between the genes for the three immunities. The experiment confirmed the practicability of breeding to incorporate genes for immunities from these three viruses into new raspberry varieties.
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Jennings, D.L. Studies on the inheritance in the red raspberry of immunities from three nematode-borne viruses. Genetica 35, 152–164 (1964). https://doi.org/10.1007/BF01804883
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DOI: https://doi.org/10.1007/BF01804883