Genetic parameters of husk spot resistance in macadamia breeding families
نویسندگان
چکیده
Abstract Husk spot caused by the Pseudocercospora macadamiae fungus induces premature abscission of fruit in many industry standard macadamia cultivars. Fungicides and other management strategies add to farm costs, thus breeding for varietal resistance is important. Genetic parameters husk symptom expression had not previously been estimated. To guide selection methods field resistance, over 300 open-pollinated seedlings 32 families 24 parent genotypes were inoculated, seven traits evaluated. Narrow-sense broad-sense heritabilities estimated, values predicted, correlations between trait pairs tested significance. The with highest necrotic lesion number per ( H 2 = 0.41–0.59; h 0.21–0.30) incidence 0.19–0.27; 0.17–0.24). Breeding two highly correlated (r 0.98; p < 0.001), suggesting that either could be used indirectly select other. All expressed symptoms some degree, however, symptom-induced low clones progeny cultivar ‘HAES791’. Necrotic also promising ‘HAES246’ Australian Macadamia Program elite selection, ‘BAM263’. Having identified as potentially partially resistant, these selections can now further evaluated parents new populations.
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ژورنال
عنوان ژورنال: Euphytica
سال: 2023
ISSN: ['1573-5060', '0014-2336']
DOI: https://doi.org/10.1007/s10681-023-03169-2