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Titre :
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Inheritance of partial resistance to Myzus persicae in lettuce
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Auteurs :
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K. Reinink ;
F. Dieleman ;
R. Groenwold
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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Format :
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71-78
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Langues:
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= Anglais
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Mots-clés:
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Aphididae
;
Lactuca sativa
;
lettuce
;
Myzus persicae
;
green peach aphid
;
resistance
;
Resistance aux depredateurs
;
Test de resistance
;
Genetique de resistance
;
Croissance ponderale
;
Compositae
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Résumé :
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The genetics of partial resistance of lettuce to Myzus persicae was studied using F-1 and F-2 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 F-1 and F-2 from the midparent found, which were probably caused by epistatic effects. Reciprocal F(1)s 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.
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Source :
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Euphytica - 0014-2336, vol. 80, n° 1-2
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