National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Forty two diverse genotypes of potato (Solanum tuberosum L.) were evaluated for various quantitative and qualitative traits to determine the association of yield and its components. Correlation analysis revealed that the magnitude of genotypic correlation coefficient was higher as compared to their corresponding phenotypic correlation coefficient for most of the characters. The total tuber yield exhibited significantly positive correlation with plant height, number of stems per plant, number of tubers per plant, average weight of tubers per plant and marketable tuber yield at both genotypic and phenotypic levels. Whereas, it had significant and negative correlation with dry matter and reducing sugar at both the levels. This character showed positive and non-significant correlation with chip colour at both levels. Remaining traits were found negatively and non-significantly correlation at both levels. The path coefficient analysis revealed higher positive direct effect of tubers affected with common scab, marketable tuber yield and number of tubers per plant, while the direct effects of plant height and number stems per plant were observed negative and low in magnitude but this two character contributed indirectly via number of tubers per plant, marketable tuber yield, total soluble solid and average weight of tubers per plant towards total tuber yield. Considering the findings of correlation coefficients as well as direct and indirect effects of different yield components on total tuber yield it was suggested that greater emphasis should be laid on selection for number of tubers per plant, average weight of tubers per plant and marketable yield to achieve further improvement in tuber yield of potato.
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