Populations of doubled haploids for genetic mapping in hexaploid winter triticale |
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| Authors: | M. Tyrka S. Oleszczuk J. Rabiza-Swider H. Wos M. Wedzony J. Zimny A. Ponitka A. Ślusarkiewicz-Jarzina R. J. Metzger P. S. Baenziger A. J. Lukaszewski |
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| Affiliation: | 1.Department of Biotechnology and Bioinformatics,Rzeszow University of Technology,Rzeszow,Poland;2.Institute of Plant Breeding and Acclimatization, National Research Institute,Radzikow,Poland;3.Department of Ornamental Plants,Warsaw University of Life Sciences,Warsaw,Poland;4.Plant Breeding Strzelce Ltd., Co. - IHAR-PIB Group,Strzelce,Poland;5.Department of Cell Biology and Genetics,Pedagogical University of Cracow,Kraków,Poland;6.Institute of Plant Genetics,Poznan,Poland;7.Department of Crop and Soil Science,Oregon State University,Corvallis,USA;8.Department of Agronomy and Horticulture,University of Nebraska,Lincoln,USA;9.Department of Botany and Plant Sciences,University of California,Riverside,USA |
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| Abstract: | 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. |
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