Path-Coefficient Analysis of Leaf-Anatomical Characters Affecting Frost Injury in Potato |
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| Authors: | S. P. Tiwari N. P. Sukumaran C. L. Khushu |
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| Affiliation: | Dr. S. P. Tiwari;, Cytogenetics Section, N.R.C.C. (I.C.A.R.), Junagadh-362015 Dr. N. P. Sukumaran;, Division of Crop Physiology and Biochemistry, Central Potato Research Institute (I.C.A.R.), Simla-171001 Dr. C. L. Khushil;Division of Genetics, Central Potato Research Institute (I.C.A.R.), SimIa-171001 (India). |
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| Abstract: | Correlation and path-coefficient analysis for leaf-anatomical characters affecting frost injury was carried out in twenty eight varieties and accessions belonging to several wild and cultivated tuber-bearing species of Solanum in order to identify selection criteria in breeding for frost resistance in potato Palisade thickness and palisade proportion showed a significant negative correlation with frost injury Path-coefficient analysis revealed that palisade thickness had the highest direct negative effect on frost injury whereas leaf thickness, not conforming to its behaviour as found in simple correlation analysis, emerged ax the next highest factor to have direct positive effect on frost injury. Direct and indirect effects of these factors on frost injury vis a vis their interdependence were found to be in support ot the ‘palisade thickness method’ for screening frost resistant genotypes in potato breeding programmes. |
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| Keywords: | Solanum spec frost injury leaf anatomy path-coefficient analysis |
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