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Inheritance of resistance toPyrenochaeta lycopersiciin tomato

โœ Scribed by R. B. Volin; R. T. McMillan

Publisher
Springer
Year
1978
Tongue
English
Weight
369 KB
Volume
27
Category
Article
ISSN
0014-2336

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โœฆ Synopsis

Tomato accessions (Lycopersicon sp.), along with commercial cultivars and breeding lines were grown in a field infested with the brown root rot (BRR) organism, Pyrenochaeta lycopersici and evaluated for resistance. Three L. esculentum MILL. accessions, PI. 260397, P.I. 262906 and P.I. 203231, were resistant and were used as male parents in crosses designed to transfer resistance to tomatoes of fresh market type. Through analysis of parental generations and Fi and FZ progenies from three crosses the heritability of resistance in the broad sense was estimated to range from 25 to 43 percent. The minimum number of genes influencing resistance was estimated to be from 4 to 8.

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