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Transfer of the ph1b Deletion Chromosome 5B From Chinese Spring Wheat Into a Winter Wheat Line and Induction of Chromosome Rearrangements in Wheat-Aegilops biuncialis Hybrids
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SYSNO ASEP 0561589 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Transfer of the ph1b Deletion Chromosome 5B From Chinese Spring Wheat Into a Winter Wheat Line and Induction of Chromosome Rearrangements in Wheat-Aegilops biuncialis Hybrids Author(s) Türkösi, E. (HU)
Ivanizs, L. (HU)
Farkas, A. (HU)
Gaál, E. (HU)
Kruppa, K. (HU)
Kovács, P. (SK)
Szakács, É. (HU)
Szőke-Pázsi, K. (HU)
Said, Mahmoud (UEB-Q) ORCID
Cápal, Petr (UEB-Q) RID, ORCID
Griffiths, S. (GB)
Doležel, Jaroslav (UEB-Q) RID, ORCID
Molnár, I. (HU)Number of authors 13 Article number 875676 Source Title Frontiers in Plant Science. - : Frontiers Research Foundation - ISSN 1664-462X
Roč. 13, JUN 13 (2022)Number of pages 15 s. Language eng - English Country CH - Switzerland Keywords Aegilops biuncialis ; bread wheat ; chromosome flow sorting ; homoeologous recombination ; in situ hybridization ; meiotic chromosome pairing ; ph1b mutant OECD category Biochemistry and molecular biology R&D Projects EF16_019/0000827 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEB-Q - RVO:61389030 UT WOS 000817802300001 EID SCOPUS 85133444063 DOI 10.3389/fpls.2022.875676 Annotation Effective utilization of genetic diversity in wild relatives to improve wheat requires recombination between wheat and alien chromosomes. However, this is suppressed by the Pairing homoeologous gene, Ph1, on the long arm of wheat chromosome 5B. A deletion mutant of the Ph1 locus (ph1b) has been used widely to induce homoeologous recombination in wheat × alien hybrids. However, the original ph1b mutation, developed in Chinese Spring (CS) background has poor agronomic performance. Hence, alien introgression lines are first backcrossed with adapted wheat genotypes and after this step, alien chromosome segments are introduced into breeding lines. In this work, the ph1b mutation was transferred from two CSph1b mutants into winter wheat line Mv9kr1. Homozygous genotypes Mv9kr1 ph1b/ph1b exhibited improved plant and spike morphology compared to Chinese Spring. Flow cytometric chromosome analysis confirmed reduced DNA content of the mutant 5B chromosome in both wheat genotype relative to the wild type chromosome. The ph1b mutation in the Mv9kr1 genotype allowed wheat-alien chromosome pairing in meiosis of Mv9kr1ph1b_K × Aegilops biuncialis F1 hybrids, predominantly with the Mb-genome chromosomes of Aegilops relative to those of the Ub genome. High frequency of wheat-Aegilops chromosome interactions resulted in rearranged chromosomes identified in the new Mv9kr1ph1b × Ae. Biuncialis amphiploids, making these lines valuable sources for alien introgressions. The new Mv9kr1ph1b mutant genotype is a unique resource to support alien introgression breeding of hexaploid wheat. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2023 Electronic address https://doi.org/10.3389/fpls.2022.875676
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