Genetic diversity of late blight resistant and susceptible Indian potato cultivars revealed by RAPD markers |
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| Authors: | Debasis Pattanayak Swarup K Chakrabarti Prakash S Naik |
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| Institution: | (1) Division of Crop Improvement, Central Potato Research Institute, Shimla, 171 001, India |
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| Abstract: | Twenty-four tetraploid Indian potato cultivars were characterized by using RAPD markers to assess diversity within and between
late blight resistant and susceptible cultivars. Sixty-four random decamer primers generated802 fragments, ranging in size
from 60–3200 bp, with 96.4% fragment polymorphism. Shannon's index of diversity was used to quantify the degree of variability
present within and between the variety types. Most of the diversity was detected within variety types, with 88% of variation
being within and 12% being between the resistant and susceptible cultivars. No clear groupings based on late blight resistance
and susceptibility or kinship was reflected on the dendogram. The late blight resistant cultivars exhibited higher variability
compared to susceptible cultivars and they were more dispersed on the PCO plot.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | genetic diversity late blight potato RAPD |
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