Quantitative trait variation of Guizotia abyssinica (L.fCass. Collected from Ethiopia.
2008
Yohannes Petros;Merker,Arnulf and Habtamu Zeleke(student)
Thirty six accessions of guizotia abyssinica (niger in English) collected from eight niger growing regions of Ethiopia and grown at Haramaya University andHirna trial sites were evaluated form phenotypic diversity.Ten quantitative traits were used to characterize the accessions at the two sites.The first four principal components based on the regional means of each trait accounted for about 91% of the total variation observed among the accessions.Eigenvectors from the first, second, third and fourth principal components axes accounted respectively for about 43,25,16 and 7% of the total variation. In the first principal components axis that explained about 43% of the regional variation; plant height, days to 50% flowering, days to flower initiation, number of inflorescence per plant, 1000 seed weight, yield per plot and number of primary branches were the most important variables for grouping the accessions into clusters.The UPGMA dendrogram produced using the plot means of each accessions clearly separated the two main types of niger grown in Ethiopia into two main clusters.The prospects of improving the crop are also discussed.
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