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Exploration and Utilization of Genetic Diversity Exotic Germplasm for Barley Improvement

Angessa, T.T. and Li, C. (2016) Exploration and Utilization of Genetic Diversity Exotic Germplasm for Barley Improvement. In: Exploration, Identification and Utilization of Barley Germplasm. Elsevier Inc., pp. 223-240.

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Research reports show high genetic diversity in exotic germplasm, which include landraces and wild barley, and low genetic diversity in commercial cultivars. However, exotic germplasm have been reported to be underutilized in barley cultivar development. This is probably due to consumer demand on high yield and high-quality barley cultivars especially for malting purposes, and poor agronomic and quality traits in exotic germplasm. Nevertheless, exotic germplasm have genes that can help reduce the damage caused by biotic and abiotic stress factors. Mass screening and evaluation helped to identify important genotypes that contributed to the development of commercial cultivars. To increase the efficiency of identifying genotypes with important genes from barley germplasm conserved ex situ worldwide, systematic approaches need to be used. The Core-Collection concept, based on agromorphologic traits, and the Focused Identification of Germplasm Strategy (FIGS), based on ecological data of collection site matched with the ecology of the stress factors, can play useful roles. Although such approaches can substantially reduce the number of germplasm for evaluation, they have their own shortcomings that may limit their uses.

Publication Type: Book Chapter
Murdoch Affiliation: School of Veterinary and Life Sciences
Publisher: Elsevier Inc.
Copyright: © 2016 Zhejiang University Press Co., Ltd.
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