An association between resistance to root aphid (Pemphigus bursarius L.) and downy mildew (Bremia lactucae Regel) in lettuce [Lactuca sativa L.]
1980
Crute, I.R. | Dunn, J.A. (National Vegetable Research Station, Wellesbourne, Warwick (UK))
Many lettuce cultivars (Lactuca sativa L.) with high resistance to lettuce root aphid (Pemphigus bursarius L.) also carried the gene Dm-6 for specific resistance to downy mildew (Bremia lactucae REGEL). This suggests the possibility of linkage between this gene and root aphid resistance. The origin of this association is discussed
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