Diversity on Seed Quality Traits of Ethiopian Mustard (Brassica Carinata A. Braun) Among Seed Samples Selected From Oromiya Regional State, Ethiopia Assessed By Proximate Analysis
No Thumbnail Available
Date
2007-07
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
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.
Keywords/Phrases: B. carinata, seed quality traits, protein, oil/fat, fibre, mineral,
moisture, carbohydrate, proximate composition, seed quality traits.
Description
Keywords
B. carinata, seed quality traits, protein, oil/fat, fibre, mineral, moisture, carbohydrate, proximate composition, seed quality traits.