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    ThesisItemOpen Access
    Socio economic analysis of certified wheat seed producers in US Nagar Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-06) Vivek Kumar; Singh, Ashutosh
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    ThesisItemOpen Access
    Socioeconomic analysis of certified wheat seed producers in US Nagar, Uttarakhand
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-06) Vivek Kumar; Singh, Ashutosh
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    ThesisItemOpen Access
    Variability, heritability and genetic advance studies in mid-season cauliflower (Brassica oleracea var. botrytis L.)
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-06) Vivek Kumar; Singh, Dhirendra Kumar
    The present study was undertaken at Vegetable Research Center, G.B. Pant University of Agriculture and Technology, Pantnagar, Udham Singh Nagar (U.K.) during September- December, 2015. Fifty seven genotypes of cauliflower were grown in Augmented Block Design II including five checks (Pusa Early Synthetic, Pant Gobi-4, Pant Gobi-3, Pusa Sharad, Pusa Pausjha) which were arranged in four blocks with eighteen genotypes in each block inclusive of five checks. The study was primarily focused on assessing variability, heritability, genetic advance, correlation coefficient, path coefficient, principal component analysis and D2 analysis. Observations were recorded on 16 quantitative characters viz., leaf length, leaf width, petiole length, plant height, plant spread, number of leaves per plant, stalk length, days to curd maturity, gross curd weight, marketable curd weight, curd length, curd breadth, net curd weight, harvest index, curd size index and curd yield per hectare. Analysis of variance revealed significant differences among all the genotypes for majority of the characters except plant spread, curd length and curd size index. On the basis of yield contributing characters the following genotypes were found promising viz., INBPCF 120, 2013/CAUMVAR-6, PCF-93, PG-5 and PCF-246. High heritability coupled with greater genetic advance was observed for gross plant weight. Curd yield per hectare showed positive and highly significant correlation with marketable curd weight, gross plant weight, net curd weight, curd breadth and plant height. Path coefficient analysis revealed that net curd weight exhibit high positive direct effect towards total yield while harvest index exerts a negative direct effect towards curd yield per hectare. The Principal component analysis showed that the first principal component account maximum 45.69% variation of total variation, while the first five principal component axes together with explained 81.72% variation, suggesting first five principal axes are adequate to explain the variation in reduced dimension. Genetic divergence through D2 analysis revealed maximum inter-cluster distance between clusters IV and VII followed by cluster IV and VIII therefore, it is recommended that genotypes grouped under cluster IV, VII and VIII were found promising for most of the yield attributes, thus can be utilized in future cauliflower breeding programme for the development of superior varieties.