Genetic Variability and Character Association in Potato (Solanum tuberosum L.)
Loading...
Date
2009
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
SKUAST Kashmir
Abstract
Twenty six genotypes of potato (Solanum tuberosum L.) were used to estimate the genetic variability parameters and correlation coefficients for seventeen quantitative and quality characters. The investigation was carried out at Vegetable Experimental Area, Division of Olericulture during kharief 2008 in a randomised block design with three replications and the observations were recorded on various traits viz., percent emergence at 45 days after planting, number of stems hill-1, leaf area (cm2), plant height (cm), plant spread (cm), number of stolons plant-1, stolon length (cm), number of tubers plant-1, average tuber weight (g), yield (g plant-1), yield (kg plot-1) and yield (q ha-1), specific gravity, TSS (0B), vitamin C (mg 100g-1), dry matter (%) and protein content (%). Analysis of variance for all the traits under study revealed highly significant genetic variation among all the genotypes. The genotypes viz., PP-2500, HB/18-36, K.Jyoti, SM/90-68 and HB/82-18 besides being high yielders also showed high per se performance for most of the traits and were economically viable under Kashmir conditions. With respect to quality traits, the genotypes viz., PP-48, Hirpora Local, PP-2500, HB/18-36 and Gurez Local were found to be superior. Phenotypic and genotypic coefficients of variation for most of the traits were found moderate to high except for percent emergence at 45 days after planting, plant height, specific gravity, vitamin C and dry matter. High heritability along with high genetic gain was observed for tuber yield per plant, followed by leaf area, average tuber weight, stolon length, total soluble solids, yield plot-1 and ha-1, number of stolons and number of tubers plant-1 indicating that these traits could be exploited for further improvement through selection procedures. Genotypic correlation coefficients between the traits were generally higher than their corresponding phenotypic correlation coefficients. Tuber yield plant-1 exhibited significant positive correlation with number of stems hill-1, leaf area, plant height, plant spread, number of stolons plant-1, stolon length, number of tubers plant-1, average tuber weight, yield plot-1, yield ha-1, specific gravity and dry matter content both at phenotypic and genotypic levels whereas it was negative and significant with protein content. The path coefficient analysis at genotypic level revealed that average tuber weight had highest positive direct effect on tuber yield plant-1 followed by number of tubers plant-1, stolon length and plant height. These traits are the strongest forces influencing tuber yield, therefore, should be taken into consideration while selecting for higher yield in potato.
Description
M.Sc Thesis submitted to SKUAST Kashmir
Keywords
Correlations, economics, path analysis, potato, variability, Olericulture/Vegetable Science