Introgression Breeding in Barley: Perspectives and Case Studies
Changing production scenarios resulting from unstable climatic conditions are challenging crop improvement efforts. A deeper and more practical understanding of plant genetic resources is necessary if these assets are to be used effectively in developing improved varieties. In general, current varie...
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Published in | Frontiers in plant science Vol. 11; p. 761 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Frontiers Media S.A
12.06.2020
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Subjects | |
Online Access | Get full text |
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Summary: | Changing production scenarios resulting from unstable climatic conditions are challenging crop improvement efforts. A deeper and more practical understanding of plant genetic resources is necessary if these assets are to be used effectively in developing improved varieties. In general, current varieties and potential varieties have a narrow genetic base, making them prone to suffer the consequences of new and different abiotic and biotic stresses that can reduce crop yield and quality. The deployment of genomic technologies and sophisticated statistical analysis procedures has generated a dramatic change in the way we characterize and access genetic diversity in crop plants, including barley. Various mapping strategies can be used to identify the genetic variants that lead to target phenotypes and these variants can be assigned coordinates in reference genomes. In this way, new genes and/or new alleles at known loci present in wild ancestors, germplasm accessions, land races, and un-adapted introductions can be located and targeted for introgression. In principle, the introgression process can now be streamlined and linkage drag reduced. In this review, we present an overview of (1) past and current efforts to identify diversity that can be tapped to improve barley yield and quality, and (2) case studies of our efforts to introgress resistance to stripe and stem rust from un-adapted germplasm. We conclude with a description of a modified Nested Association Mapping (NAM) population strategy that we are implementing for the development of multi-use naked barley for organic systems and share perspectives on the use of genome editing in introgression breeding. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-3 content type line 23 ObjectType-Review-1 Reviewed by: Michael Baum, International Center for Agricultural Research in the Dry Areas (ICARDA), Morocco; Shengguan Cai, Zhejiang University, China This article was submitted to Plant Breeding, a section of the journal Frontiers in Plant Science Edited by: Mariola Plazas, Polytechnic University of Valencia, Spain |
ISSN: | 1664-462X 1664-462X |
DOI: | 10.3389/fpls.2020.00761 |