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Karchi, Z., Newe Ya'ar Experiment Station, ARO, Haifa Post, Israel
Cohen, S., Virus Laboratory, ARO, The Volcani Center, Bet Dagan, Israel
Govers, A., Newe Ya'ar Experiment Station, ARO, Haifa Post, Israel
Yoseph, R., Virus Laboratory, ARO, The Volcani Center, Bet Dagan, Israel
A green-fleshed cucumber mosaic virus (CMV)-resistant cantaloupe line, 'Xy 140', resembling the recurrent parent, was obtained after five cycles of backcrossing followed by selfing from a cross between the cultivars 'Noy Yizre'el' (susceptible) and 'Freeman Cucumber' (resistant). Compared with the respective non-infected cultivars, CMV infection in an early stage of growth reduced the yield of Noy Yizre'el by 73% and of Xvl40 by 31%. Yield reduction in Noy Yizre'el was due to fewer fruits and lower fruit weight, whereas in Xvl40 fruit weight was not affected although the number of fruits per plant was reduced. CMV content of Xvl40 was much lower than that of Noy Yizre'el, but slightly higher than that of the resistant parent - Freeman Cucumber. These results may indicate that during the breeding process a slight loss in the level of resistance had occurred. For all practical purposes, Xvl40 possesses a high level of resistance which will enable good commercial yields even under conditions of very early CMV infection. © 1978 Springer Science + Business Media B.V.
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Response of susceptible and resistant cantaloupes (Cucumis Melo) to cucumber mosaic Virus under field conditions
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Karchi, Z., Newe Ya'ar Experiment Station, ARO, Haifa Post, Israel
Cohen, S., Virus Laboratory, ARO, The Volcani Center, Bet Dagan, Israel
Govers, A., Newe Ya'ar Experiment Station, ARO, Haifa Post, Israel
Yoseph, R., Virus Laboratory, ARO, The Volcani Center, Bet Dagan, Israel
Response of susceptible and resistant cantaloupes (Cucumis Melo) to cucumber mosaic Virus under field conditions
A green-fleshed cucumber mosaic virus (CMV)-resistant cantaloupe line, 'Xy 140', resembling the recurrent parent, was obtained after five cycles of backcrossing followed by selfing from a cross between the cultivars 'Noy Yizre'el' (susceptible) and 'Freeman Cucumber' (resistant). Compared with the respective non-infected cultivars, CMV infection in an early stage of growth reduced the yield of Noy Yizre'el by 73% and of Xvl40 by 31%. Yield reduction in Noy Yizre'el was due to fewer fruits and lower fruit weight, whereas in Xvl40 fruit weight was not affected although the number of fruits per plant was reduced. CMV content of Xvl40 was much lower than that of Noy Yizre'el, but slightly higher than that of the resistant parent - Freeman Cucumber. These results may indicate that during the breeding process a slight loss in the level of resistance had occurred. For all practical purposes, Xvl40 possesses a high level of resistance which will enable good commercial yields even under conditions of very early CMV infection. © 1978 Springer Science + Business Media B.V.
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