Inheritance of partial resistance to Myzus persicae in lettuce |
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| Authors: | Kees Reinink Frans L Dieleman Remmelt Groenwold |
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| Institution: | (1) Dept. of Vegetable and Fruit Crops, Centre for Plant Breeding and Reproduction Research (CPRO-DLO), P.O. Box 16, 6700 AA Wageningen, The Netherlands;(2) Department of Entomology, Agricultural University, P.O. Box 8031, 6700 EH Wageningen, The Netherlands |
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| Abstract: | Summary The genetics of partial resistance of lettuce to Myzus persicae was studied using F1 and F2 generations of two crosses between a susceptible and partially resistant accession (Norden x Batacer and Liba x Norden) and three crosses in which both parents were partially resistant (Batavia la Brillante x Batacer, Batacer x Liba and CGN4741 x Batacer). Partial resistance to M. persicae inherited quantitatively, without important dominance effects. Only in the cross Batacer x Liba were significant departures of the F1 and F2 from the midparent found, which were probably caused by epistatic effects. Reciprocal F1s had similar resistance levels, indicating the absence of cytoplasmic or other maternal effects. Estimates of broad-sense heritability ranged from 0.34 to 0.61. The results indicated that lines with an improved resistance level can be obtained from crosses between partially resistant accessions, preferably by line selection or the application of indirect marker aided selection.Abbreviations PR
partial resistance, partially resistant
- S
susceptibility, susceptible |
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| Keywords: | Aphididae Lactuca sativa lettuce Myzus persicae green peach aphid resistance |
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