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Selection of resistant genotypes of Quince (Cydonia oblonga Mill.) to root and crown rot caused by the pathogen, Phytophthora cactorum, in the lab condition by H. Sadeghi Garmaroodi; H. Abdollahi; M. Mohammadi Garmaroodi is a Agricultural and Biological Sciences article available to read on EtoBox.

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Phytophthora root and crown rot is a common disease of different hortcrops in rosaceae family including pomefruits and stonefruits. In order to characterize reaction of different quince genotypes to Phytophthora, infected root and crown tissues of apple and quince trees in addition to some soil around them were collected from the orchards and cultured on semi-selective media. Four oomycete isolates out of 20 samples were recovered from which Phytophthora isolates were identified as P. cactorum, using physiological and morphological criteria. Disease resistance evaluation of quince genotypes to P. cactorum was implemented using excised twigs of 24 genotypes in glass bottles containing carrot agar media overlaid with a fresh layer of P. cactorum. The pathogenic isolate of P. cactorum selected from a pathogenicity test on unripe pear fruits. After two weeks of preservation of bottles in dark condition in 25 °C in growth chamber, the extent of necrosis was measured using a digital calipers then it was divided by length of twig to get the necrosis proportion. The genotypes showed a statistically significant different reaction to the pathogen at 1% level. Comparison of means using Duncan

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Author

H. Sadeghi Garmaroodi; H. Abdollahi; M. Mohammadi Garmaroodi

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)