Populations of doubled haploids for genetic mapping in hexaploid winter triticale

To create a framework for genetic dissection of hexaploid triticale, six populations of doubled haploid (DH) lines were developed from pairwise hybrids of high-yielding winter triticale cultivars. The six populations comprise between 97 and 231 genotyped DH lines each, totaling 957 DH lines. A conse...

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Bibliographic Details
Published in:Molecular breeding 2018, Vol.38 (4), p.46-15, Article 46
Main Authors: Tyrka, M., Oleszczuk, S., Rabiza-Swider, J., Wos, H., Wedzony, M., Zimny, J., Ponitka, A., Ślusarkiewicz-Jarzina, A., Metzger, R. J., Baenziger, P. S., Lukaszewski, A. J.
Format: Article
Language:English
Subjects:
Biomedical and Life Sciences
Biotechnology
Chromosomes
Cultivars
Gene mapping
Genetics
Genomes
Genotype & phenotype
Hybrids
Life Sciences
Mapping
Markers
Molecular biology
Plant biology
Plant Genetics and Genomics
Plant Pathology
Plant Physiology
Plant Sciences
Populations
Quantitative trait loci
Rape plants
Rye
Triticale
Vernalization
Wheat
Winter
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Summary:To create a framework for genetic dissection of hexaploid triticale, six populations of doubled haploid (DH) lines were developed from pairwise hybrids of high-yielding winter triticale cultivars. The six populations comprise between 97 and 231 genotyped DH lines each, totaling 957 DH lines. A consensus genetic map spans 4593.9 cM is composed of 1576 unique DArT markers. The maps reveal several structural rearrangements in triticale genomes. In preliminary tests of the populations and maps, markers specific to wheat segments of the engineered rye chromosome 1R (RM1B) were identified. Example QTL mapping of days to heading in cv. Krakowiak revealed loci on chromosomes 2BL and 2R responsible for extended vernalization requirement, and candidate genes were identified. The material is available to all parties interested in triticale genetics.
ISSN:1380-3743
1572-9788
DOI:10.1007/s11032-018-0804-3