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Genetic and Molecular Studies for Regulation of Bolting Time of Onion (Allium cepa L.)

Authors
Hyun, Dong YunKim, Ok-TaeBang, Kyong-HwanKim, Young-ChangYoo, Nam HeeKim, Cheol WooLee, Jeong Hwan
Issue Date
Dec-2009
Publisher
SPRINGER HEIDELBERG
Keywords
Onion; Bolting time; Chromodomain
Citation
JOURNAL OF PLANT BIOLOGY, v.52, no.6, pp.602 - 608
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF PLANT BIOLOGY
Volume
52
Number
6
Start Page
602
End Page
608
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/118855
DOI
10.1007/s12374-009-9078-y
ISSN
1226-9239
Abstract
The control of bolting time in onion is an important approach for bulb and seed production, as onion plants which bolt do not produce marketable bulbs and seed yields are dependent on floral induction. However, genetic and molecular studies about bolting time in onion plants have not been examined yet to date. In order to understand the regulation of bolting time in onion plants, we conducted the genetic crosses between late bolting-type cultivar (MOS8) and very early bolting-type cultivar (Guikum). Segregation ratio of late to very early in F-2 populations indicated that this lateness trait was determined by a dominant locus. We also analyzed protein profiles in onion plants with different bolting time by a proteomics approach. Interestingly, a protein spot with significant similarities to chromodomains of mammalian chromo-ATPase/helicase-DNA-binding 1 or heterochromatin protein 1, which is involved in the histone modifications, was identified. Histone methyltransferase activity was also observed in onion plants. Taken together, these results suggest that a genetic pathway may be involved in the modulation of bolting time in onion plants, though there is no direct evidence that this protein spot obtained by proteomics is relevant to vernalization.
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