Genetic analysis of yield and quality traits in Brassica campestris var. Yellow Sarson
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Date
2005-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The experiment was conducted with seven diverse genotypes of Brassica compestsis var. yellow sarson viz. PYS-9808-1, PYS-2005, PYS-2009-1, YSBNC-1, MYSL-221, and YSCN-14& B-9 at Crop Research Centre, G.B.Pant University of Agriculture and Technology, Pantnagar. The parents and their 42 Fi's including reciprocals were evaluated for seventeen important yield and quality traits.
The results revealed significant differences among genotypes for all the characters.Number of secondary branches per plant, number of siliquae per plant and stearic acid showed high GCV/PCV.High heritability in broad sense was observed for days to 50% flowering, days to 100% flowering, days to maturity, number of secondary branches per plant, number of siliquae per plant, leaf angle, number of seeds per siliqua, palmitic acid, stearic acid, oleic acid, linoleic acid., linolenic acid, eicosenoic acid and erucic acid. Highest genetic advance observed for number of secondary branches per plant and number of siliquae per plant. 1000 seed weight was significantly and positively correlated with number of siliquae per plant while negative correlation with days to 50% flowering and number of secondary branches per plant. Number of seeds per siliquae showed positive and significant correlation with number of secondary branches per plant number of siliquae per plant showed positive and significant correlation with number of primary branches per plant while it showed significant and negative correlation with days to 50% flowering and days to 100% flowering. Days to 100% flowering showed positive and significant correlation with days to 50% flowering. Erucic acid was positively and significantly correlated with oleic acid while it showed negative and significant correlation with palmitic acid and linoleic acid. Eicosenoic acid showed positive correlation with oleic acid while stearic acid was negatively correlated with Palmitic acid.
For some of the characters gca variances were found to be significant while sea variance showcd significance for some characters. The higher magnitude of gca than sea exhibited involvement of additive genetic variance for some traits and rest traits showed higher magnitude of sea, where non- additive gene action was involved. The reciprocal variances were also found to be significant for some traits and were even more pronounced on both gca and sea for some traits. PYS-2009-1 was found to be best general combiner followed by B-9 and PYS-2005.
Majority of crosses showed a moderate to high range of heterosis for all the traits. Economic heterosis was found maximum for number of siliquae per plant (205-276%) and minimum for day to maturity (4.00-5.00%)
YSBNC-1xYSCN-14(days to 50% flowering, days to 100% flowering, oleic acid), PYS-9808-1xPYS-2009-1(days to maturity, number of secondary branches per plant) and YSBNC-1 xB-9 (number of primary branches per plant and number of siliquae per plant) were the best heterotic crosses.
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