A Detailed Analysis of the BR1 Locus Suggests a New Mechanism for Bolting after Winter in Sugar Beet (Beta vulgaris L.).

Trankner, C., Lemnian, I. M., Emrani, N., Pfeiffer, N., Tiwari, S. P., Kopisch-Obuch, F. J., Vogt, S. H., Muller, A. E., Schilhabel, M., Jung, Christian and Grosse, I. (2016) A Detailed Analysis of the BR1 Locus Suggests a New Mechanism for Bolting after Winter in Sugar Beet (Beta vulgaris L.). Frontiers in Plant Science, 7 . DOI 10.3389/fpls.2016.01662.

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Sugar beet (Beta vulgaris ssp. vulgaris) is a biennial, sucrose-storing plant, which is mainly cultivated as a spring crop and harvested in the vegetative stage before winter. For increasing beet yield, over-winter cultivation would be advantageous. However, bolting is induced after winter and drastically reduces yield. Thus, post-winter bolting control is essential for winter beet cultivation. To identify genetic factors controlling bolting after winter, a F-2 population was previously developed by crossing the sugar beet accessions BETA 1773 with reduced bolting tendency and 93161P with complete bolting after winter. For a mapping-by-sequencing analysis, pools of 26 bolting-resistant and 297 bolting F2 plants were used. Thereby, a single continuous homozygous region of 103 kb was co-localized to the previously published BR1 QTL for post-winter bolting resistance (Pfeiffer et al., 2014). The BR1 locus was narrowed down to 11 candidate genes from which a homolog of the Arabidopsis CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR 73-1 (CPSF73-1) was identified as the most promising candidate. A 2 bp deletion within the BETA 1773 allele of BvCPSF73-la results in a truncated protein. However, the null allele of BvCPSF73-la might partially be compensated by a second BvCPSF73-Ib gene. This gene is located 954 bp upstream of BvCPSF73-la and could be responsible for the incomplete penetrance of the post-winterbolting resistance allele of BETA 1773. This result is an important milestone for breeding winter beets with complete bolting resistance after winter.

Document Type: Article
Additional Information: Times Cited: 0 Traenkner, Conny Lemnian, Ioana M. Emrani, Nazgol Pfeiffer, Nina Tiwari, Surya P. Kopisch-Obuch, Friedrich J. Vogt, Sebastian H. Mueller, Andreas E. Schilhabel, Markus Jung, Christian Grosse, Ivo
Keywords: sugar beet, winter beet, flowering time, mapping-by-sequencing, vernalization
Research affiliation: Kiel University > Kiel Marine Science
OceanRep > The Future Ocean - Cluster of Excellence
Kiel University
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.3389/fpls.2016.01662
ISSN: 1664-462X
Projects: Future Ocean
Date Deposited: 27 Feb 2017 08:16
Last Modified: 26 Aug 2019 09:41
URI: http://oceanrep.geomar.de/id/eprint/36351

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