Segregation for Resistance to Black Rot in Selfed Grape Seedlings
DOI:
https://doi.org/10.71318/apom.1977.31.3.59Abstract
Susceptibility to black rot ( Guignardia bidwellii(Ell.) Viala and Ravaz) has been reported in Vitisspecies at levels varying from highly susceptible V. viniferaL. cultivars to highly resistant clones of V. cinereaEngelm., V. rupestrisScheele, and V. rotundifoliaMichx. (2, 3, 4, 5). Immunity to black rot has been found in selections of V. cinereaand V. rupestris, and is being incorporated into horticulturally desirable cultivars (6). Artificially inoculated (1) young seedlings from crosses between resistant and susceptible cultivars demonstrated a quantitative inheritance pattern, with some seedlings exceeding either parent in susceptibility or resistance (3). The purpose of this paper is to report a clearcut segregation that occurred for black rot resistance on the fruit of mature S 1seedlings of 'Blue Lake' grape.
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