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Correlation and Path Coefficient Analysis in Fat and Fatty Acids of Rapeseed and Mustard

S.M. Rafiqul Islam
Scientific Officer
On-Farm Research Division, BARI, Sabujbag, Patuakhali-8600

L. RAHMAN
Professor
Department of Genetics and Plant Breeding, BAU, Mymensingh-2202, Bangladesh

M. S. ALAM
Professor
Department of Genetics and Plant Breeding, BAU, Mymensingh-2202, Bangladesh

Abstract/ Executive Summary:

Twenty-two genotypes of Brassica (B. rapa, B. juncea, and B. napus) were studied for correlation co-efficient between major fatty acids and path coefficient analysis to partition the cause and effect relationship into direct and indirect components. Correlation coefficient of major fatty acids revealed that significant and positive correlation was between palmitic and oleic acids, palmitic and linoleic acids, palmitic and cicosenoic acids, oleic and eicosenoic acids, linoleic and linolenic acids and eicosenoic and erucic acids, while significant and negative correlation was observed between palmitic and erucic acids, stearic and linolenic acids and oleic and erucic acids. Path coefficient revealed that direct effect of all fatty acids except palmitic acid on oil content was positive. Indirect effect of erucic acid through all other fatty acids except palmitic acid on oil content was negative, Indirect effect of palmitic acid via all other fatty acids except erucic acid was positive.

Keywords: Fat and fatty acids, Rapeseed and mustard.

Location: BARI. Joydebpur, Gazipur

Start Date: 00-00-2004

End Date: 00-00-2005

Program Area: Variety and Species

Commodity: Mustard

Objectives:

To find out the interrelationship between different fatty acids and the direct and indirect cause of association, which could help in quality breeding in rapeseed and mustard.

Methodology:

The present study was carried out with twenty varieties of Brassica genus developed by different organizations of Bangladesh and two advanced lines. The genotypes were Daulat, Sonali (SS-75), Kallyania (TS-72), Rai-5, BARI Sarisa- 6. BARI Sarisa-7, BARI Sarisa-8, BARI Sarisa-9, BARI Sarisa-10, BARI Sarisa lI, BARI Sarisa-12, and BARI Sarisa-13 developed by Bangladesh Agricultural Research Institute (BARI), Gazipur; Agrani, Safal, BINA Sarisa-3, BINA Sarisa- 4, BINA Sarisa-5, and BINA Sarisa-6 developed by Bangladesh Institute of Nuclear Agriculture (BINA), Mymensingh and Sampad and Sambal by Bangladesh Agricultural University (BAU), Mymensingh and two lines, viz., BJ- 536 and Nap-179 by BARI. The seeds were collected from the crops grown during Rabi season of 2004-05 from the respective organization. Quantification of fatty acids composition (%) was performed with Gas Liquid Chromatography (GLC) method by Philips PU4500 Chromatograph in the Central Laboratory, BARI. Joydebpur, Gazipur. In the GLC column temperature was fixed at 185°C, injector temperature was 220°C and the detector temperature was 240°C. Fatty acid compositions (%) were calculated from the chromatograph. Unit area for each peak of respective fatty acid was calculated against starting time by GLC. Fatty acid composition was calculated as follows Factor = (100/100-Unit area solvent).

Source of Information: Bangladesh J. Agril. Res. 34(2) : 247-253, June 2009, ISSN 0258-7122

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Correlation coefficient of major fatty acids revealed that significant and positive correlation was between palmitic and oleic acids, palmitic and linoleic acids, palmitic and cicosenoic acids, oleic and eicosenoic acids, linoleic and linolenic acids and eicosenoic and erucic acids, while significant and negative correlation was observed between palmitic and erucic acids, stearic and linolenic acids and oleic and erucic acids. Path coefficient revealed that direct effect of all fatty acids except palmitic acid on oil content was positive. Indirect effect of erucic acid through all other fatty acids except palmitic acid on oil content was negative, Indirect effect of palmitic acid via all other fatty acids except erucic acid was positive.

Knowledge Management: Journal