Abstract
A study was conducted by using twenty one (21) F9 populations derived from inter-varietal crosses of Brassica rapa L. Path co-efficient analysis revealed that plant height, number of primary branches per plant, number of siliqua per plant, seeds per siliqua, and siliqua length had the positive direct effect on yield per plant and days to 50% flowering, number of secondary branches per plant, and thousand seed weight had the negative direct effect on yield per plant. Correlation studyrevealed that yield per plant had significant positive association with plant height, number of primary branches per plant, number of siliqua per plant, seeds per siliqua, and siliqua length (genotypic or phenotypic level). Based on the variability study, some F9 plants showed high heritability for short duration and yield contributing characters were selected from some of the crosses combinations of the intervarital crosses of Brassica rapafor further selection.
Highlights
Brassica oil is the world's third most important sources of edible vegetable oils [1]
Simple correlation coefficient was obtained using the formula suggested by [9, 6] and path coefficient analysis was done following the method outlined by [10]. i) Path co-efficient analysis: Path co-efficient analysis was done according to the procedure employed by [10] quoted in [6 and 11] using simple correlation values
Association of character determined by correlation coefficient may not provide an exact picture of the relative importance of direct and indirect influence of each of yield components on seed yield per plant
Summary
Brassica oil is the world's third most important sources of edible vegetable oils [1]. On Recommended Dietary Allowance (RAD) basis, Bangladesh requires 0.29 million tons of oils which is equivalent to 0.8 million tons of oilseeds; but it produces only about 0.254 million tons, which covers only 45% of the domestic need [4]. This crop covers the highest acreage which is 78% of the total oilseed acreage of Bangladesh [3].The average yield of Brassica oilseed in Bangladesh is around 963 kg/hectare [4]
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