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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/118

Title: DIVERSITY STUDY ON SEED QUALITY TRAITS OF ETHIOPIAN MUSTARD (BRASSICA CARINATA A. BRAUN) AMONG SEED SAMPLES SELECTED FROM OROMIYA REGIONAL STATE, ETHIOPIA ASSESSED BY PROXIMATE ANALYSIS
Authors: Abel, Teshome
Keywords: B. carinata
seed quality traits
protein
oil/fat
fibre
mineral
moisture
carbohydrate
proximate composition
seed quality traits
Date Added: 21-Sep-2007
Abstract: This study was designed to generate information on the diversity of seed quality traits of samples of B. carinata populations. For this study, twenty one populations of B. carinata and three cultivars of B. carinata and additional three cultivars of B. napus were used. All the analyses were done according to the official methods of AOAC (Associations of Official analytical Chemists) international. The characterization of germplasm collections of seeds based on seed proximate composition has a special importance; it serves as a benchmark for identification of potentially improved parents for breeding works. In addition, the variability on the seed quality traits could be used to classify and asses the genetic relationship among populations of B. carinata. The study showed that the protein content ranges from 13.63 % to 23.88 % with a mean value of 18.67 %, crude fat content also showed a range from 30.36 % to the 52.19 % with total mean value of 45.80 %, the fibre content goes from 4.37 % to 13.5 % with mean value of 8.59 %, mineral content showed a ranged from 2.34 % to 4.01 % with a mean value of 3.29 %, moisture content ranged from 3.18 % to 5.09 % with the mean value of 4.23 % and finally, carbohydrate content showed a range from 21.36 % to 43.0 % with the mean value of 27.58 %. In the correlation analysis, the crude fat content of the samples showed negative correlation with that of the protein content and carbohydrate content. Moreover, the moisture content on dry weight bases showed a positive correlation with mineral content and protein contents and negative correlation with that of carbohydrate content. In contrast, carbohydrate content showed positive correlation with that of fibre content of the seeds. The principal component analysis generated three main components which explained around 80% of the total variation observed. In the cluster analysis, most of the cultivars used in the study fall in the same group, which indicates their consistency for the six seed quality traits analyzed in the study. Furthermore, the comparison of populations of B. carinata with that of the released cultivars in terms of seed quality traits revealed that there is still a room for enhancement of the cultivars. In general, the information generated from this study could be used to plan crosses and optimize the use of B. carinata here in Ethiopia and worldwide.
Description: A Thesis Submitted to Graduate Studies Program, Addis Ababa University in Partial Fulfillment of the Requirements for the Degree of Master of Science in Biology (Applied Genetics)
URI: http://hdl.handle.net/123456789/118
Appears in:Thesis - Biology

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