科研之友
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摘要
Information on the variation available for different plant attributes has enabled germplasm collections to be effectively utilized in plant breeding. This investigation was carried out to characterize 85 durum wheat accessions based on 19 qualitative and quantitative agro-morphological attributes and to describe the genetic variation among the accessions as a subset of worldwide germplasm collection conserved in Iran under irrigated condition. The investigation was also aimed to study relationship among the traits and to find out adapted accessions that can be used in durum wheat breeding program. Univariate and Multivariate (clustering and ordination) techniques were used to investigate the diversity present among the accessions in the collection. Both cluster and ordination analyses suggested that eight groups of accessions existed. The comparison of accession groups based on traits verified that it is possible to find out contrasting group based on the traits for improving genetic materials in breeding programs. Applying accession-by-trait (AT) biplot analysis to the multiple trait data revealed that AT-biplot graphically displayed the interrelationships among traits and facilitated visual comparison of accessions and selection. The results also showed that, based on qualitative and quantitative measurements, the accessions in different groups were belonged to different countries which suggested that there was no clear relationship between accessions and geographical diversity. The information on diversity and relationships among the agro-morphological traits will be helpful to breeders in constructing their breeding populations and implementing selection strategies.
- 出版日期2010-9
