Abstract
Regeneration cycle of seeds kept at genebanks is determined by seed longevity. Information about longevity of species is important for storage periods, germination test intervals, and reproduction cycles. Seed longevity is different between species and depends on the storage conditions. It also differs between genotypes of a species providing the basis of genetic analyses of seed longevity. Studies in hexaploid wheat and barley have identified numerous quantitative trait locus (QTL) linked to the trait. Seed longevity in durum wheat, however, has not been attempted so far. Here, we present the first report of genetic analysis of grain longevity in durum wheat using a bi-parental mapping population composed of 114 recombinant inbred lines. QTL analysis identified three highly significant and one significant QTL for initial germination (on chromosomes 4B, 5A (2 QTL), and 6B), three significant QTL for germination after accelerated aging treatment (on chromosomes 5A and 7B (2 QTL)), and five significant QTL determining relative germination and distributed on chromosomes 3A, 3B, 5A, 6B, and 7B. This study confirms the results of previous investigations in bread wheat and provides a baseline for further research in durum wheat.
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Mian Abdur Rehman Arif and Andreas Börner designed the study. Mian Abdur Rehman Arif performed the experiments and wrote the manuscript. Andreas Börner reviewed the manuscript.
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This article does not contain any studies with human participants or animals performed by any of the authors.
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Communicated by: Barbara Naganowska
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Arif, M.A.R., Börner, A. Mapping of QTL associated with seed longevity in durum wheat (Triticum durum Desf.). J Appl Genetics 60, 33–36 (2019). https://doi.org/10.1007/s13353-018-0477-y
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DOI: https://doi.org/10.1007/s13353-018-0477-y