Short duration oilseed Brassica varieties are important to increase cropping intensity as well as total oilseed production. In this research, genetic and multivariate analyses were conducted for 19 morphological characters of 48 rapeseed and mustard genotypes. Evaluation of oil content and fatty acid profiles were done for ten selected rapeseed and mustard genotypes. Significant genotypic variations were observed for all morphological characters except 1000 seeds weight. Days to 50% flowering, plant height, total number of siliqua per plant, number of seeds per siliqua, length of siliqua and days to maturity exhibited high broad sense heritability along with high genetic advance. Length of primary branches, number of primary branches, number of secondary branches, total number of siliqua per plant, number of siliqua per main axis and number of siliqua per primary branches had a significant and positive correlation with yield per plant. According to principal component analysis and cluster analysis, BARI Sarisha-9, BD-110455, BD-7113, BD-6954 and BD-6953 were the earliest genotypes and BD-10112, M-395 and M-119-5 were comparatively high yielding genotypes. The genotypes BD-6953, BD-6954, BD-10455, BD-10112 and BD-7113 had comparatively lower erucic acid and saturated fatty acid profiles that are regarded as better edible oil characteristics. The selected genotypes and associated traits could be utilized for developing short duration, high yielding and edible quality rapeseed-mustard varieties.

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Rapeseeds have many health benefits because its oil is rich in polyunsaturated and monounsaturated fatty acids, tocopherols and phytosterols. The
objective
of this research was to examine a possible genetic variation of oil, fatty acids, tocopherols and phytosterols in eight rapeseed varieties and the effect of locations on expression of those chemical compounds. In this study, effects of variety x location interaction for palmitic, stearic, oleic, linoleic, linolenic, eicogenic and erucic contents were found to be significant while that of oil content was not. For oil content, variation between the two locations was much higher than all other factors. Variation among varieties was the major source of variation in most fatty acids. Variation between two locations was much less for tocopherols and phytosterols than that for oil and fatty acids. Instead, variation in residual effect was much higher in tocopherols and phytosterols demanding more number of replication to achieve same level of statistical precision as oil and fatty acids. Correlation analyses confirmed that some of the chemical compounds can be a target for indirect selection.

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• Screening of Pod Shatter Resistance and Analysis of Correlations with Agronomic Traits in Rapeseed (Brassica napus L.)
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  Korean Journal of Food Preservation.2016; 23(6): 839.     CrossRef
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  A-Young Lee, Soon-Taek Hong, Young-Seok Jang, Jeung-Hee Lee
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