Progeny testing for resistance to potato virus Y: a comparison of susceptible potato cultivars for use in testcrosses with resistant parents |
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Authors: | Ruth M Solomon-Blackburn G R Mackay |
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Institution: | (1) Scottish Crop Research Institute, Invergowrie, DD2 5DA Dundee, UK |
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Abstract: | Summary For potato breeding or genetical research purposes, the number of copies of a dominant major gene for resistance to potato
virus Y in a parent clone can be determined by test-crossing with a susceptible parent and observing the segregation ratio
of resistant to susceptible seedlings in the progeny. In a comparison of different susceptible cultivars for use in test-crosses
for this purpose, their progenies differed in the clarity of symptoms and parental phenotype proved an unreliable guide. Cvs
Maris Piper, Arran Peak and Dr MacIntosh were found to be suitable tester parents, Pentland Squire less so and cv. Désirée
was confirmed as having a major gene conferring incomplete resistance. It was found advisable to test-cross with more than
one susceptible parent. |
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Keywords: | PVY plant breeding progeny tests genetics resistance Solanum tuberosum L |
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