Indian Society of Genetics & Plant Breeding

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GENERAL COMBINING ABILITY FOR FIELD RESISTANCE TO LATE BLIGHT IN POTATO

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Estimates ofgeneral combiningabilityof19 potato parents were computed by the weighted
least square analysis using data from greenhouse testing of field resistance to late blight in
32,552 seedlings from 28 crosses. SLBIP-9-12, KufriJyoti and SLBIR-ll-10 were found to be
the best parents for transmitting late blight resistance. Very high correlation <f26. 0.83")
between the observed and fitted percentage of resistant seedlings in different aosses
indicated that useful information can be obtained through this model about the promising
parents for late blight resistance from the data which are otherwise rejected. However,
significant ,l value indicated that specific combining ability between parents also
contributed to the observed variation.
 

Keywords: Late blight resistance, combining ability, potato.

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Year: 1992
Volume: 52
Issue: 4
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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