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Possibility of combining low levels of fire blight resistance in pear

, : Possibility of combining low levels of fire blight resistance in pear. Acta Horticulturae (69): 97-101

In this paper presented at the Second International Symposium on Pear Growing, held in Florence, Italy, 5-6 October 1976, it is noted that hybrid combinations of the varieties Bartlett (= Williams Bon Chretien), Seckel, Comice and Re Carlo di Wurtemberg (King Charles of Wurttemberg) provide additive sources of resistance to Erwinia amylovora. Such sources have led to the development of highly resistant varieties, including Magness, Moonglow and Dawn.

Accession: 000463215

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Related references

Quamme H.A.; Kappel F.; Hall J.W., 1990: Efficacy of early selection for fire blight resistance and the analysis of combining ability for fire blight resistance in several pear progenies. A set of progenies was tested for fire blight resistance by needle inoculation at 3 mo of age in the greenhouse and then 5 yr later in the orchard to determine if the measurements of fire blight resistance made in the greenhouse was correlated wit...

Bell, R.L.; Janick, J.; Zimmerman, R.H.; Zwet, T. van der, 1977: Estimation of heritability and combining ability for fire blight resistance in pear. Heritability estimates for resistance to Erwinia amylovora were obtained by calculating the regression of means of progeny (from 256 crosses involving 30 varieties and advanced selections) on midparental adjusted phenotypic values. Approximately h...

Bagnara, G.L.; Rivalta, L.; Laghi, M.; Quarta, R., 1997: Evaluation of resistance to fire blight in pear: combining ability and breeding strategies. Some 107 progenies from various intervarietal crosses were assessed for resistance to Erwinia amylovora following inoculation and under field conditions. Fruit quality and duration of the juvenile stage were also assessed. Analysis of GCA and SCA...

Bagnara, G.L.; Rivalta, L.; Laghi, M.; Quarta, R., 1996: Evaluation of fire blight resistance in pear: combining ability and breeding strategy. The combining ability of parents used in pear breeding for fire blight (Erwinia amylovora) resistance was estimated in order to define the best breeding strategy. The breeding value was calculated to estimate the potential of each single parent. S...

Rivalta, L.B.gnara, G.; Cobianchi, D., 1985: Breeding program for pear genetic improvement for Psylla, pear scab, fire blight resistance and dwarf trees by the Istituto Sperimentale per la Frutticoltura. Acta Horticulturae 159: 92

Bell, R.L.; Zwet, T. van der, 1987: Fire blight resistance in cultivars and selections of pear and the correlations between measures of resistance. In greenhouse and field tests 23 pear cultivars and 36 breeding selections were evaluated for their reaction to inoculation with Erwinia amylovora. The results indicated a large amount of variability in reaction within genotypes and analysis of va...

Lamb, Robert C., 1960: Resistance to fire blight of pear varieties. A technique of testing the resistance of pears to fire blight (Erwinia amylovora) is described. The results of tests of resistance of 51 varieties in 4 years is presented. No variety of pears immune to blight was found but resistance varied quite...

Anonymous, 2006: Pear breeding for fire blight resistance

Dow K.P., 1968: Breeding for resistance to fire blight in the pear d. John Innes Institute Annual Report:

Zwet, T. van der; Oitto, W.A.; Blake, R.C., 1974: Fire blight resistance in pear cultivars. Of 20 pear cvs evaluated for their degree of resistance to Erwinia amylovora 9 were rated as resistant: (in descending order) Magness, Moonglow, El Dorado, Comice, Maxine, Mac, Dawn, Duchesse d'Angouleme and Kieffer. Small plots of trees are...